BAD MAF, OR is this normal?

Basic tech questions such as future setups, different turbo kits, car diagnosis, etc
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s14BEAST808
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BAD MAF, OR is this normal?

Post by s14BEAST808 »

So im still having sputtering/misfiring issues time to time.
Dizzy checks out good, sparks plugs are good, rotor is good, cap is good, plugs are new.
This is my question about the maf
Car runs about 900-1000 rpms with maf plugged in, a little shakey, and sometimes just suddenly dies.
So while the engine is running, i unplug the maf and the idles jumps up to 1,100 rpms and purrs really nicly, i hav also noticed that when the maf is unplugged it revs up way faster to 2,500 rpms. When the mafs plugged in it stumbles a little bit and then raises when i quickly WOT it. Now when i plug the maf back in the car instantly dies. Are these the signs of a bad maf???
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PDavis40
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Post by PDavis40 »

Is there a turbo? blow through or normal style?
s14BEAST808
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Post by s14BEAST808 »

engine is n/a atm
s14BEAST808
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Post by s14BEAST808 »

When the maf is plugged in, and if i open the throttle all the way super fast, it hesitates for a good second then climbs up finally, when the mafs unplugged it revs up SUPER fast to 2500 rpms.
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eazye2000
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Post by eazye2000 »

I don't know much about your setup. But if you have a stock ECU, injectors, MAF, and pretty much everything else, I would say there is something up with the MAF. Try some CRC MAF cleaner, or you can look up some of the non-chlorinated brake cleaner method; but I have no personal experience with this and have only read about it. (saves you like 3 bucks)
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s14BEAST808
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Post by s14BEAST808 »

yeah i bought genuine maf cleaner.... didnt really notice a change
s14BEAST808
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Post by s14BEAST808 »

Everything is completly stock except the gutted cat and 2.5 inch megan catback exhaust with test pipe
s14BEAST808
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Post by s14BEAST808 »

UGGGG come on guys. People on this island suck dicckk. Nobody will meet up with me just so I can test to see if my maf works or not
NateDogg
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Post by NateDogg »

Just use a multimeter to see if it's reading wrong.

Download a FSM and diagnose it.
'91 S13
Built, balanced KA-T
s14BEAST808
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Post by s14BEAST808 »

So i found someone locally to swap mafs. And of course when i meet up with him, my car acts normal and dosesnt hesitate at all......... so irrataing... So i swapped mafs and it just seemed fine, like i didnt do anything at all. It seems intermentint.... SO my next step is to pick up some injectors, send them to detschwerks for cleaning and see if that does anychange.

QUESTION, THE REAR O2 SENSOR. ITS SMALLER THEN THE REGULAR O2 SENSOR.
WHERE CAN I FIND AN antifouler for it???? Quesiton is because i gutted my cat.
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240-kid
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Post by 240-kid »

Lol
Yeah chasing intermittent problems suck ass.

What kind of gas do you run?
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s14BEAST808
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Post by s14BEAST808 »

V-Power from Shell. (Premium) As much as possible.
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Post by s14BEAST808 »

92 Oct i believe
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azS13
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Post by azS13 »

Up until you said it was intermittent I would have said to check for any vacum leaks. But that kinda changes things, if it had a leak it would be there all the time. maybe the wiring to the maf is messed up somewhere? Your injectors shouldn't cause it to hesitate when the maf is plugged in and then act normal when its unplugged.
91 240sx- always broken
1jz project started May 2011
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yojo006
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Post by yojo006 »

i had the same problem my car was down for weeks it also was intermittent, i have a stock 98 kouki and kept stalling out and shaking, smoking alittle out the exhaust....no codes what so ever, i did the same as you and tryed my MAF on a friends car and it ran fine ......it ended up being the MAF after all...i have been running for about 3 months no problems...im running a 97,98 Altima MAF cause they r alot easier to find in the junk yards yet still a 2.4l
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