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HOW TO RUN MAXIMA COILS ( UPDATED )

Posted: Tue Jul 30, 2013 8:01 pm
by R34SR
HOW TO RUN 01 MAXIMA COILS ON MS2PNP FOR S14 KA24DE
ECU#: NS9501A ( PCB VERSION 1.2 )



UPDATE 02/21/2016

I noticed some confusion about the spark outputs A and B for some users, just wanted to confirm what member "carbonfibers14" noted....if you are using the newer revision 1.3 board that has 26 pins on the rear instead of the older 15 pin ver 1.2 board like i used in this writeup, you will have completely different outputs for your spark A and B output. On a 1.3+ board, spark A will be pin 17 and spark B will be pin 16...please wire appropriately!!

Also , with proper cooling i have ran these coils up to 18 psi, stock .44 gap with a gt2871r at 3.0ms dwell time without any spark blowout , random discharges or overheating....they are no match for ls coils, but they sure can get the job done!

Lastly , there are some who had issues with the coils overheating when they installed them the way that recommended, please make sure that you have them set to "going high/ inverted" IF they still overheat then try "going low" to see if that helps before changing the way they are wired ( Im not sure if this also is a ver 1.2 vs 1.3 mainboard difference OR perhaps i truly have them wired incorrectly in my diagram, unfortunately i am not able to check my wiring at this time , i sincerely apologize in the event that is in fact the case.


I'll start by saying that even though you realize how straight forward the installation is when you're done, there was actually a lot of trial and error in getting it to run without issues since documentation on running maxima coils is almost nil aside from people saying they have only 3 pins...power, ground and ecu signal. No one says WHICH pins those are exactly, what must be done with the stock ignition system to prevent interference, and also that not just ANY 12v ignition signal or ground can power them properly.

This guide assumes that you have the DIY aftermarket trigger wheel installed and timed correctly, as it is needed to run in wasted spark mode.

So... on to the coils, I chose the 01 maxima coils because they are drop in with perfect fitment, do not NEED a mounting system unless you feel like it, has a built in ignitor so no external one needed, they are triggered by 5v so perfect for us megasquirt users and best of all NO MORE PLUG WIRES!! Some folks use 95-99 maxima coils, which is fine, I just chose these because they are “newer” and felt a bit heavier, which in my mind equates to a larger coil..however I could be wrong, oh and don't forget...you need to use 4 coils from the FRONT BANK of the maxima. I bought mine new but If you go to a junker you need 2 donor cars.



To get things started, lets orient ourselves with the maxima coils, From top to bottom we will label the pins X, Y, and Z.

Image
Image


You will need to run 2 wires from your MS2PNP module to the coils.

Image


1. PIN 2 of the ecu is SPARK “A” which needs to be ran to the coils on cylinder 1 and 4 ONLY by connecting them to PIN “Z” of both those coils. (this is the signal that charges and fires the coils)

2. PIN 3 of the ecu is SPARK “B” which needs to be ran to pin Z of the coils also, but ONLY on cylinders 2 and 3.

3. PIN 15 is an ecu ground, which is how I grounded all 4 of my coils at first, which proved not to be sufficient under cranking, therefore I highly recommend you DO NOT ground the coils at the ecu...instead you should ground the coils at the engine head or intake manifold.

4. SIDENOTE: I chose to run PIN 11 of the ecu to my aftermarket TACH as my tach signal did not work after this installation.

5. Powering the coils:
Now this can be one of the most overlooked, yet important parts of your installation, you need to power all 4 coils with an ACCESORY 12v power supply,however it must also be a power supply that is not affected by cranking otherwise the coils will not have enough juice to get your motor started (trust me). I chose to run a direct connection to the battery using an 80 amp battery isolator relay, 80 amps is probably overkill but its what I had laying around. I am triggering the relay using an “add a fuse” On the fuel pump fuse in the driver side fusebox ( s14 ). When the relay receives 12v it engages the heavy duty direct battery connection to all 4 coils.

Here is a basic overview of what I did so you can get a picture in your head of how to go about your install.... (DONT HATE ON MY PAINT SKILLS)

Image

Now that the coils are completely wired up, its time to disable the stock ignition system so that it does not fire simultaneously as your maxima coils...if they do, they will cause serious interference and you will get erratic timing at higher rpms which will induce serious knock and possibly kill your engine. In order to do this simply disconnect the 2 pin connector on your distributor to kill the power to the coil. Don't touch the 6 pin connector on the distributor as that is what carries your CAS signal.

Image

Now for the fun part, lets test everything to see if you did a good job, or if you just need to hand your 240 over to a more competent being...me......i kid I kid:-).

First lets configure megasquirt to run in wasted spark mode instead of using the stock single coil. Use these settings and you should be good to go, as you can see I'm using 1.3ms of dwell time and can currently hit 15lbs of boost without blow out on the stock plug gap for NGK bkr7e plugs. I recommend you start with 1.0ms which is considered a safe starting point for these coils (from what I read) and work slowly up if necessary checking for excessive heat build up on the coils. (trigger angle varies by motor, please use your own value here otherwise you will have incorrect base ignition timing)

Image

Next up connect a spark plug to each coil and ground all 4 to any spot on the engine to test for spark.

lets start by:

1. Opening tuner studio with the ignition on and connected to the ecu.
2. Click on “Advanced”
3. Click on “Output Test Mode”
4. Enter the values you see below exactly as is then hit BURN and you should be getting spark from “COIL A” which are cylinders 1 and 4
5. Now select “COIL B” which are cylinders 2 and 3....you should now see spark from both of these.

Image

Now that we have successfully wired up our coils and tested for spark..... its time to fire her up!
Install your plugs, connect the coils and let her rip.

Once you have her started you will want to verify timing by using the fixed advance table to 15* (or 20 or whatever number floats your boat) and verify that it holds that number ALL THE WAY to the maximum rpm that you use....you need to do this to make sure that the timing is not drifting in the upper rpm range.

If you have done all these things correctly, give yourself a pat on the back, a cold beer and enjoy your new distributorless COP ignition system!!

Re: HOW TO RUN MAXIMA COILS

Posted: Wed Jul 31, 2013 8:58 pm
by S14wayz
Exactly what I need! Aesthetically they look so good.. super clean. Thank you for taking the time to make the write up. stickkyy!

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 5:21 am
by airman
Excellent write up, stickied!

Make sure those pictures don't go anywhere! I'd host them on the KA-T.org server if I could!

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 6:28 am
by R34SR
Thanks guys , glad you like.

The pics are hosted on a photobucket account i've had for years so i don't think that's going anywhere, anytime soon :-)

I also think we should start a thread about what other coils would work in similar configuration nothing but make, model , year and COP only. I happened to be in the junk yard the other day and saw an audi a8 older model , i pulled the coils and they fit perfect and are much larger than maxima coils.

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 6:53 am
by arob987
I'm not planing to run maxima coils but this looks like a great writeup.glad to see great info being stickied.

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 6:56 am
by Matt Cramer
Great write-up! Thanks for posting it.

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 8:15 am
by R34SR
Thanks matt, i should mention that you were very helpful in diagnosing when i was having an issue with the LS coils, which turned out to be as simple as disconnecting the stock coil system.

Oh and dont sue me for using your pic of the ecu :-)

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Aug 01, 2013 7:56 pm
by sm240sx
very nice! ill probably run these coils :D

Re: HOW TO RUN MAXIMA COILS

Posted: Sun Aug 11, 2013 10:16 pm
by S14wayz
where did you get your coils new from? OEM?

Re: HOW TO RUN MAXIMA COILS

Posted: Mon Aug 12, 2013 5:58 am
by R34SR
Arch auto parts...but there's also rock auto..

Re: HOW TO RUN MAXIMA COILS

Posted: Tue Aug 27, 2013 12:49 pm
by Wmcleverly
What would I need to load for the aem setup to run these coils. I have the aem series 2 and maxima coils I want to install. Has anyone done this to a aem ems what pins do I need to hook up. All help without bashing would be great

Re: HOW TO RUN MAXIMA COILS

Posted: Wed Sep 18, 2013 7:45 pm
by Wmcleverly
^^^bump^^^

Re: HOW TO RUN MAXIMA COILS

Posted: Sat Sep 21, 2013 8:28 am
by R34SR
you need to talk to someone who has used AEM, i believe Rosado Racing was one of the first folks i saw running macima coils with an AEM ecu....pm those guys and im sure they can at least give you a basic rundown.

Re: HOW TO RUN MAXIMA COILS

Posted: Mon Sep 23, 2013 7:49 pm
by Wmcleverly
Thanks. I got ahold of him and he walked me right through it

Re: HOW TO RUN MAXIMA COILS

Posted: Mon Sep 23, 2013 11:28 pm
by R34SR
Glad I could point you in the right direction...even nicer that they took the time to help you.

Re: HOW TO RUN MAXIMA COILS

Posted: Wed Oct 23, 2013 12:17 pm
by souljaseth33
This is a great write up I will keep in mind.

On s13 ka, just do not plug in the external coil to disable factory ignition, but keep the dist plugged in?

Re: HOW TO RUN MAXIMA COILS

Posted: Sat Dec 28, 2013 8:13 am
by neverlift
what base would you start at with the spark hardware latency if you were experiencing some timing fluctuation?

Re: HOW TO RUN MAXIMA COILS

Posted: Fri Jan 10, 2014 5:29 pm
by R34SR
Better late than never response i guess.....i dont patrol these forums nearly as frequently as i used to...work and life is a bi*ch.

Anyway 1.0ms is a safe number to start with.....ive been running 1.5ms with these maxima coils and so far no issues.


if your getting drift, especially in the upper rpm range its usually some kind of signal interference...make sure you have good clean engine grounds...a power source for the coils that is installed the way i described in this write up...and lastly make sure the stock ignition system is completely disabled and not firing.

Re: HOW TO RUN MAXIMA COILS

Posted: Mon Jul 14, 2014 4:03 pm
by 240sx-venezuela
I had to switch ecu signal wire with power wire because I did it like the picture but the coils got hot, once I switched they worked perfectlly

Re: HOW TO RUN MAXIMA COILS

Posted: Sun Oct 26, 2014 6:49 am
by s13240
Thank you for this write up, this is awesome!.

Re: HOW TO RUN MAXIMA COILS

Posted: Wed Mar 11, 2015 5:20 pm
by Kill3rwill
Thanks for the write up bro! I used it today, like the other guy said, the power and signal needs to be switched in your diagram in order to run. But other than that, it helped simplify things.

Re: HOW TO RUN MAXIMA COILS

Posted: Wed Mar 11, 2015 8:22 pm
by R34SR
glad to see this is still useful, I'm sorry to hear more than one person had to switch the power and ground to get it to work, I wish I could recheck my setup to confirm this but unfortunately I don't get to drive my car much at all lately, work and planning my future has practically taken my "life" away, which used to be working on my 240
:(

Re: HOW TO RUN MAXIMA COILS

Posted: Wed May 13, 2015 12:53 pm
by CarbonFiberS14
Great write up, just finished my setup yesterday. Only thing I could add besides the forementioned diagram change is that the pins are different for gen 2 pnp megasquirts. Spark A is pin 17 and spark B is 16.

Re: HOW TO RUN MAXIMA COILS

Posted: Wed May 13, 2015 12:58 pm
by R34SR
glad to hear it's working for you guys, I still can't confirm changes because my s14 is in NYC and im in Fla , sad times for my 240...

Re: HOW TO RUN MAXIMA COILS

Posted: Thu Oct 29, 2015 2:43 am
by CarbonFiberS14
Just wanted to add this because I am redoing my harness-
Use an s15 sr20det coil pack harness and purchase the coil interface harness connector from wiring specialties and you can have an almost oe setup. I recently started having issues with the harness I prevoisly made.

Re: HOW TO RUN MAXIMA COILS ( UPDATED )

Posted: Mon Jun 13, 2016 6:26 am
by deepsage
I believe the top connector on the coils is signal and the bottom is power. The back of the coil connector shows "IB G +", from top to bottom. The shop manual for the 2000 Maxima indicates same in wiring diagram.

Can somebody please send me a picture of his values on the megasquirt

Posted: Mon Feb 13, 2023 10:43 pm
by Anthony27
deepsage wrote: Mon Jun 13, 2016 6:26 am I believe the top connector on the coils is signal and the bottom is power. The back of the coil connector shows "IB G +", from top to bottom. The shop manual for the 2000 Maxima indicates same in wiring diagram.
deepsage wrote: Mon Jun 13, 2016 6:26 am I believe the top connector on the coils is signal and the bottom is power. The back of the coil connector shows "IB G +", from top to bottom. The shop manual for the 2000 Maxima indicates same in wiring diagram.
R34SR wrote: Tue Jul 30, 2013 8:01 pm HOW TO RUN 01 MAXIMA COILS ON MS2PNP FOR S14 KA24DE
ECU#: NS9501A ( PCB VERSION 1.2 )



UPDATE 02/21/2016

I noticed some confusion about the spark outputs A and B for some users, just wanted to confirm what member "carbonfibers14" noted....if you are using the newer revision 1.3 board that has 26 pins on the rear instead of the older 15 pin ver 1.2 board like i used in this writeup, you will have completely different outputs for your spark A and B output. On a 1.3+ board, spark A will be pin 17 and spark B will be pin 16...please wire appropriately!!

Also , with proper cooling i have ran these coils up to 18 psi, stock .44 gap with a gt2871r at 3.0ms dwell time without any spark blowout , random discharges or overheating....they are no match for ls coils, but they sure can get the job done!

Lastly , there are some who had issues with the coils overheating when they installed them the way that recommended, please make sure that you have them set to "going high/ inverted" IF they still overheat then try "going low" to see if that helps before changing the way they are wired ( Im not sure if this also is a ver 1.2 vs 1.3 mainboard difference OR perhaps i truly have them wired incorrectly in my diagram, unfortunately i am not able to check my wiring at this time , i sincerely apologize in the event that is in fact the case.


I'll start by saying that even though you realize how straight forward the installation is when you're done, there was actually a lot of trial and error in getting it to run without issues since documentation on running maxima coils is almost nil aside from people saying they have only 3 pins...power, ground and ecu signal. No one says WHICH pins those are exactly, what must be done with the stock ignition system to prevent interference, and also that not just ANY 12v ignition signal or ground can power them properly.

This guide assumes that you have the DIY aftermarket trigger wheel installed and timed correctly, as it is needed to run in wasted spark mode.

So... on to the coils, I chose the 01 maxima coils because they are drop in with perfect fitment, do not NEED a mounting system unless you feel like it, has a built in ignitor so no external one needed, they are triggered by 5v so perfect for us megasquirt users and best of all NO MORE PLUG WIRES!! Some folks use 95-99 maxima coils, which is fine, I just chose these because they are “newer” and felt a bit heavier, which in my mind equates to a larger coil..however I could be wrong, oh and don't forget...you need to use 4 coils from the FRONT BANK of the maxima. I bought mine new but If you go to a junker you need 2 donor cars.



To get things started, lets orient ourselves with the maxima coils, From top to bottom we will label the pins X, Y, and Z.

Image
Image


You will need to run 2 wires from your MS2PNP module to the coils.

Image


1. PIN 2 of the ecu is SPARK “A” which needs to be ran to the coils on cylinder 1 and 4 ONLY by connecting them to PIN “Z” of both those coils. (this is the signal that charges and fires the coils)

2. PIN 3 of the ecu is SPARK “B” which needs to be ran to pin Z of the coils also, but ONLY on cylinders 2 and 3.

3. PIN 15 is an ecu ground, which is how I grounded all 4 of my coils at first, which proved not to be sufficient under cranking, therefore I highly recommend you DO NOT ground the coils at the ecu...instead you should ground the coils at the engine head or intake manifold.

4. SIDENOTE: I chose to run PIN 11 of the ecu to my aftermarket TACH as my tach signal did not work after this installation.

5. Powering the coils:
Now this can be one of the most overlooked, yet important parts of your installation, you need to power all 4 coils with an ACCESORY 12v power supply,however it must also be a power supply that is not affected by cranking otherwise the coils will not have enough juice to get your motor started (trust me). I chose to run a direct connection to the battery using an 80 amp battery isolator relay, 80 amps is probably overkill but its what I had laying around. I am triggering the relay using an “add a fuse” On the fuel pump fuse in the driver side fusebox ( s14 ). When the relay receives 12v it engages the heavy duty direct battery connection to all 4 coils.

Here is a basic overview of what I did so you can get a picture in your head of how to go about your install.... (DONT HATE ON MY PAINT SKILLS)

Image

Now that the coils are completely wired up, its time to disable the stock ignition system so that it does not fire simultaneously as your maxima coils...if they do, they will cause serious interference and you will get erratic timing at higher rpms which will induce serious knock and possibly kill your engine. In order to do this simply disconnect the 2 pin connector on your distributor to kill the power to the coil. Don't touch the 6 pin connector on the distributor as that is what carries your CAS signal.

Image

Now for the fun part, lets test everything to see if you did a good job, or if you just need to hand your 240 over to a more competent being...me......i kid I kid:-).

First lets configure megasquirt to run in wasted spark mode instead of using the stock single coil. Use these settings and you should be good to go, as you can see I'm using 1.3ms of dwell time and can currently hit 15lbs of boost without blow out on the stock plug gap for NGK bkr7e plugs. I recommend you start with 1.0ms which is considered a safe starting point for these coils (from what I read) and work slowly up if necessary checking for excessive heat build up on the coils. (trigger angle varies by motor, please use your own value here otherwise you will have incorrect base ignition timing)

Image

Next up connect a spark plug to each coil and ground all 4 to any spot on the engine to test for spark.

lets start by:

1. Opening tuner studio with the ignition on and connected to the ecu.
2. Click on “Advanced”
3. Click on “Output Test Mode”
4. Enter the values you see below exactly as is then hit BURN and you should be getting spark from “COIL A” which are cylinders 1 and 4
5. Now select “COIL B” which are cylinders 2 and 3....you should now see spark from both of these.

Image

Now that we have successfully wired up our coils and tested for spark..... its time to fire her up!
Install your plugs, connect the coils and let her rip.

Once you have her started you will want to verify timing by using the fixed advance table to 15* (or 20 or whatever number floats your boat) and verify that it holds that number ALL THE WAY to the maximum rpm that you use....you need to do this to make sure that the timing is not drifting in the upper rpm range.

If you have done all these things correctly, give yourself a pat on the back, a cold beer and enjoy your new distributorless COP ignition system!!

Can somebody please send me a picture of his values on the mega squirt

Posted: Mon Feb 13, 2023 10:43 pm
by Anthony27
deepsage wrote: Mon Jun 13, 2016 6:26 am I believe the top connector on the coils is signal and the bottom is power. The back of the coil connector shows "IB G +", from top to bottom. The shop manual for the 2000 Maxima indicates same in wiring diagram.
deepsage wrote: Mon Jun 13, 2016 6:26 am I believe the top connector on the coils is signal and the bottom is power. The back of the coil connector shows "IB G +", from top to bottom. The shop manual for the 2000 Maxima indicates same in wiring diagram.
R34SR wrote: Tue Jul 30, 2013 8:01 pm HOW TO RUN 01 MAXIMA COILS ON MS2PNP FOR S14 KA24DE
ECU#: NS9501A ( PCB VERSION 1.2 )



UPDATE 02/21/2016

I noticed some confusion about the spark outputs A and B for some users, just wanted to confirm what member "carbonfibers14" noted....if you are using the newer revision 1.3 board that has 26 pins on the rear instead of the older 15 pin ver 1.2 board like i used in this writeup, you will have completely different outputs for your spark A and B output. On a 1.3+ board, spark A will be pin 17 and spark B will be pin 16...please wire appropriately!!

Also , with proper cooling i have ran these coils up to 18 psi, stock .44 gap with a gt2871r at 3.0ms dwell time without any spark blowout , random discharges or overheating....they are no match for ls coils, but they sure can get the job done!

Lastly , there are some who had issues with the coils overheating when they installed them the way that recommended, please make sure that you have them set to "going high/ inverted" IF they still overheat then try "going low" to see if that helps before changing the way they are wired ( Im not sure if this also is a ver 1.2 vs 1.3 mainboard difference OR perhaps i truly have them wired incorrectly in my diagram, unfortunately i am not able to check my wiring at this time , i sincerely apologize in the event that is in fact the case.


I'll start by saying that even though you realize how straight forward the installation is when you're done, there was actually a lot of trial and error in getting it to run without issues since documentation on running maxima coils is almost nil aside from people saying they have only 3 pins...power, ground and ecu signal. No one says WHICH pins those are exactly, what must be done with the stock ignition system to prevent interference, and also that not just ANY 12v ignition signal or ground can power them properly.

This guide assumes that you have the DIY aftermarket trigger wheel installed and timed correctly, as it is needed to run in wasted spark mode.

So... on to the coils, I chose the 01 maxima coils because they are drop in with perfect fitment, do not NEED a mounting system unless you feel like it, has a built in ignitor so no external one needed, they are triggered by 5v so perfect for us megasquirt users and best of all NO MORE PLUG WIRES!! Some folks use 95-99 maxima coils, which is fine, I just chose these because they are “newer” and felt a bit heavier, which in my mind equates to a larger coil..however I could be wrong, oh and don't forget...you need to use 4 coils from the FRONT BANK of the maxima. I bought mine new but If you go to a junker you need 2 donor cars.



To get things started, lets orient ourselves with the maxima coils, From top to bottom we will label the pins X, Y, and Z.

Image
Image


You will need to run 2 wires from your MS2PNP module to the coils.

Image


1. PIN 2 of the ecu is SPARK “A” which needs to be ran to the coils on cylinder 1 and 4 ONLY by connecting them to PIN “Z” of both those coils. (this is the signal that charges and fires the coils)

2. PIN 3 of the ecu is SPARK “B” which needs to be ran to pin Z of the coils also, but ONLY on cylinders 2 and 3.

3. PIN 15 is an ecu ground, which is how I grounded all 4 of my coils at first, which proved not to be sufficient under cranking, therefore I highly recommend you DO NOT ground the coils at the ecu...instead you should ground the coils at the engine head or intake manifold.

4. SIDENOTE: I chose to run PIN 11 of the ecu to my aftermarket TACH as my tach signal did not work after this installation.

5. Powering the coils:
Now this can be one of the most overlooked, yet important parts of your installation, you need to power all 4 coils with an ACCESORY 12v power supply,however it must also be a power supply that is not affected by cranking otherwise the coils will not have enough juice to get your motor started (trust me). I chose to run a direct connection to the battery using an 80 amp battery isolator relay, 80 amps is probably overkill but its what I had laying around. I am triggering the relay using an “add a fuse” On the fuel pump fuse in the driver side fusebox ( s14 ). When the relay receives 12v it engages the heavy duty direct battery connection to all 4 coils.

Here is a basic overview of what I did so you can get a picture in your head of how to go about your install.... (DONT HATE ON MY PAINT SKILLS)

Image

Now that the coils are completely wired up, its time to disable the stock ignition system so that it does not fire simultaneously as your maxima coils...if they do, they will cause serious interference and you will get erratic timing at higher rpms which will induce serious knock and possibly kill your engine. In order to do this simply disconnect the 2 pin connector on your distributor to kill the power to the coil. Don't touch the 6 pin connector on the distributor as that is what carries your CAS signal.

Image

Now for the fun part, lets test everything to see if you did a good job, or if you just need to hand your 240 over to a more competent being...me......i kid I kid:-).

First lets configure megasquirt to run in wasted spark mode instead of using the stock single coil. Use these settings and you should be good to go, as you can see I'm using 1.3ms of dwell time and can currently hit 15lbs of boost without blow out on the stock plug gap for NGK bkr7e plugs. I recommend you start with 1.0ms which is considered a safe starting point for these coils (from what I read) and work slowly up if necessary checking for excessive heat build up on the coils. (trigger angle varies by motor, please use your own value here otherwise you will have incorrect base ignition timing)

Image

Next up connect a spark plug to each coil and ground all 4 to any spot on the engine to test for spark.

lets start by:

1. Opening tuner studio with the ignition on and connected to the ecu.
2. Click on “Advanced”
3. Click on “Output Test Mode”
4. Enter the values you see below exactly as is then hit BURN and you should be getting spark from “COIL A” which are cylinders 1 and 4
5. Now select “COIL B” which are cylinders 2 and 3....you should now see spark from both of these.

Image

Now that we have successfully wired up our coils and tested for spark..... its time to fire her up!
Install your plugs, connect the coils and let her rip.

Once you have her started you will want to verify timing by using the fixed advance table to 15* (or 20 or whatever number floats your boat) and verify that it holds that number ALL THE WAY to the maximum rpm that you use....you need to do this to make sure that the timing is not drifting in the upper rpm range.

If you have done all these things correctly, give yourself a pat on the back, a cold beer and enjoy your new distributorless COP ignition system!!

Re: HOW TO RUN MAXIMA COILS ( UPDATED )

Posted: Tue Feb 14, 2023 1:19 pm
by R34SR
Photo bucket ***** everything up, and I have no documents of how I had it setup in the past.

I can tell you that it's pretty straightforward if you are doing wasted spark. What will confuse you is the firing order 1342

Iirc spark output A from the MS ECU goes to cyl 1 and cyl 4 coil and B goes to cyl 2 and 3 coil . All coils get a ground straight to engine, all coils get a + power supply direct to fused/ relayed battery connection. ( trust me it's needed for cranking esp on ls coils) and that's it... 3 wires on each coil and you're done. Megasquirt settings are
goinghigh/ inverted and a dwell of 2.5 to 3.0 is good, check for excessive heat.