car not starting after walbro fuel pump install

ATL240 · Post by **ATL240** » Sun Jun 26, 2011 3:19 pm

I just installed a brand new walbro fuel pump in my S14 with a z32 fuel filter and now it's having problems. It was running great for a day after the install, but then it started sputtering and turning off while I was driving it. Now it just won't start at all. I can hear the pump buzz every time I open the switch so i'm confused as to what's wrong.

It has good spark, compression, and I took the gas line after the fuel filter and gas comes out when I open the switch. What could it be? The car is broken down so I really need to fix it ASAP. Please help

s14BEAST808 · Post by **s14BEAST808** » Sun Jun 26, 2011 4:09 pm

Well you possible might have flooded it, but something else is wrong. Just wondering, what kind of FPR do you have? Is it just stock? And how did you wire the pump up? Did you follow the instructions correctly?
Id say take your plugs out see if there covered in gas, and leave the plugs out for a day, or just a super long time, gotta let that gas sink and or evaporate. See if your oil smells like gas too, if so CHANGE it. After you let it sit for a long ass time, put all the plugs in again, and see if she will fire. Hopefully you didnt wire it up wrong.

ATL240 · Post by **ATL240** » Sun Jun 26, 2011 4:28 pm

I'm running the stock FPR, and no turbo yet. Yeah I took the spark plugs out and there fine, I also left them off overnight. I no for sure that I wired it right( I followed the write-up from here) the stock fuel pump also tells you which wire is +/- . And it started up fine the first time and ran good for a day.

I noticed on one of the fuel hoses when the switch is open that gas flows but not constant. Is this normal???

s14BEAST808 · Post by **s14BEAST808** » Sun Jun 26, 2011 4:38 pm

err..... maybe you might just have a bad pump man... or somethings blocking... you should have constant pressure i believe

s14BEAST808 · Post by **s14BEAST808** » Sun Jun 26, 2011 4:39 pm

which hose are you talking about?
the return or send line?

ATL240 · Post by **ATL240** » Sun Jun 26, 2011 5:17 pm

It's hose that goes to the FPR. I just looked at it again, when I leave the switch on the pump turns on and off. Where could it possibly be blocked at though if the filter is fine?? I hope it's not the pump.

240freak88 · Post by **240freak88** » Mon Jun 27, 2011 12:28 am

wich sock did you use?when i installed mine,i used the sock they gave me and a week later had the same problem,.,then switched to my stock one and 5 months later it flows and runs great.

ATL240 · Post by **ATL240** » Mon Jun 27, 2011 10:56 am

240freak88 wrote:wich sock did you use?when i installed mine,i used the sock they gave me and a week later had the same problem,.,then switched to my stock one and 5 months later it flows and runs great.

I used the stock sock

ATL240 · Post by **ATL240** » Mon Jun 27, 2011 10:57 am

does anyone no how I can give the pump direct power without openinig the gas tank?

Jmcc · Post by **Jmcc** » Mon Jun 27, 2011 11:26 am

ATL240 wrote:does anyone no how I can give the pump direct power without openinig the gas tank?

jump the relay.

240freak88 · Post by **240freak88** » Mon Jun 27, 2011 11:29 am

ATL240 wrote:does anyone no how I can give the pump direct power without openinig the gas tank?

whatsup man ,if i were you 1st thing i would do is take off the feed line going to the injector rail,put the car in the acc position and see if the pump primes the fuel line(have a bucket to catch gas if any comes out)

2nd id hard wire the the fuel pump directly to the battery for its own power source

s14BEAST808 · Post by **s14BEAST808** » Mon Jun 27, 2011 5:17 pm

Jmcc wrote:
ATL240 wrote:does anyone no how I can give the pump direct power without openinig the gas tank?
jump the relay.

I second this. Jump it and see if that helps it.

ATL240 · Post by **ATL240** » Tue Jun 28, 2011 1:43 pm

thanks. I jumped the relay and the pump runs good so that means the pump is good. But the car does not stay on even with the pump buzzing. And I changed the relay and it still clicks!

Also took the hose off after the filter and plenty of gas comes out.

Now what??

240freak88 · Post by **240freak88** » Tue Jun 28, 2011 2:33 pm

maybe fuel pressure regulator or injectors?

ATL240 · Post by **ATL240** » Tue Jun 28, 2011 2:40 pm

Is it normal for the fuel pump to prime itself every couple of seceonds when the switch is open?

Walperstyle · Post by **Walperstyle** » Wed Jun 29, 2011 12:58 am

Spark leads crossed? Coil not connected?

ATL240 · Post by **ATL240** » Wed Jun 29, 2011 8:20 pm

Walperstyle wrote:Spark leads crossed? Coil not connected?

by spark leads do you mean spark plug wires(yes they are in the right order)?? And it's an s14 so coil is built into distributor.

Today I put the stock fuel pump back in & no luck. It still primes itself every couple of seconds......would a bad fuel pressure regulator or injectors make it do this?? I can't think of anything els that would cause this but the ECU.

240freak88 · Post by **240freak88** » Wed Jun 29, 2011 8:28 pm

ATL240 wrote:
Walperstyle wrote:Spark leads crossed? Coil not connected?
by spark leads do you mean spark plug wires(yes they are in the right order)?? And it's an s14 so coil is built into distributor.

Today I put the stock fuel pump back in & no luck. It still primes itself every couple of seconds......would a bad fuel pressure regulator or injectors make it do this?? I can't think of anything els that would cause this but the ECU.

maybe your injectors arent spraying correctly?clogged?ecu,maf?
just thinking of what can come into play maybe im wrong

slavezero · Post by **slavezero** » Thu Jun 30, 2011 9:53 am

sounds dumb but you didnt cross your fuel lines some how did you?

ATL240 · Post by **ATL240** » Thu Jun 30, 2011 11:10 am

slavezero wrote:sounds dumb but you didnt cross your fuel lines some how did you?

haha no, I didn't. The car was running perfect after I installed it, the next day it started sputtering and now it wont start.

YouTube Channel · Post by **supakat** » Thu Jun 30, 2011 12:12 pm

I have had a walbro die on me after 4 months. These pumps need more than 1/4 tank at all times. The fuel cools down the pump.

Jmcc · Post by **Jmcc** » Thu Jun 30, 2011 12:18 pm

did you check your plugs you might have fouled them out. i know a walbro on stock fpr will bring base fuel prressure up.

ATL240 · Post by **ATL240** » Thu Jun 30, 2011 4:33 pm

supakat wrote:I have had a walbro die on me after 4 months. These pumps need more than 1/4 tank at all times. The fuel cools down the pump.

the pump is good, I gave it direct power. And I have the stock fuel pump in there now.

ATL240 · Post by **ATL240** » Thu Jun 30, 2011 4:35 pm

Jmcc wrote:did you check your plugs you might have fouled them out. i know a walbro on stock fpr will bring base fuel prressure up.

I changed the plugs, and I keep checking them after cranking the car every couple of times. Im gonna try and get a cheap ECU and swap it out to see if that is the problem.

ATL240 · Post by **ATL240** » Fri Jul 01, 2011 10:38 am

Last night my cousin and I sprayed carb cleaner through the intake and it started but would shut off when we stopped spraying it of course.

body80 · Post by **body80** » Fri Jul 01, 2011 1:36 pm

Get a fuel pressure gauge.

Carb cleaner isn't a diagnostic tool.

YouTube Channel · Post by **supakat** » Fri Jul 01, 2011 2:54 pm

Actually it is a great tool! Tells you timing is good, spark is good but fuel is bad. If he crimps the return line and car turns on then FPR is bad. Maybe the fuel lines are backwards, ecu bad, injectors bad. Without pics or we physically there, it is hard for us to find the solution.

ATL240 · Post by **ATL240** » Sat Jul 09, 2011 5:41 pm

Today I changed the FPR. The car ran great for a couple of minutes then it started sputtering and it turned off a couple of times. So i'm guessing the distributor is going bad?

ATL240 · Post by **ATL240** » Wed Jul 13, 2011 5:55 pm

I just fixed it! It was the damn distributor!

240freak88 · Post by **240freak88** » Wed Jul 13, 2011 5:58 pm

ha atleast you figured it out dude good for you