mysticstriper

Ok here's the deal, I've pulled the gas tank and hot wired the pump, it's putting out 39 psi at the fuel rail. There was no power to it or the relay or the inertia switch for that matter hence the hot wire. I have spark at the plugs, and the test light shows voltage to the injectors. It will crank and run just fine if gas is poured in the throttle body through the pcv nipple. So...I'm lost. I have fire and fuel, it seems like it should run. Has anyone got any ideas? I'm a little burned out with this problem.

94StinkinLincoln

so it starts and continues to run if gas is put in through intake?

redpony88

what you said seems to contradict itself. if you have fuel presure at the rail and you say your injectors are pulsing, But it will only run if you put gas in the intake, that doesnt make sense... did you use a noid light or something to make Sure the injectors are pulsing? could they possibly be HORRIBLY clogged? or the fuel rail. has the car been sitting for a long time?

94StinkinLincoln

same thing im trying to figure out.

mjr46

well the first thing you need to do is undo what you've tried to bypass and put it all back the way the factory intended it to be and troubleshoot why the fuel pump won't power up....it should briefly power up in the koeo mode and if no pip signal is seen then power is cut to the pump..pip signal is generated from stator in dizzy and amplified trough tfi and sent to ecm as an input where ecm executes output command to power up pump relay or denergize it

AdderMk2

he's not saying that the injectors are pulsing... Those who do not understand the EFI system in our cars do not realize that the fuel injectors have a +12v constant feed to the injectors, and it is infact the ground, that is switched by the ECM


so the fact that you have +12v at the injectors, doesnt mean ****....

94StinkinLincoln

yup, thats why i asked if it stayed running, but if the injectors did not pulse, then it wouldnt run at all but for a short second at best.

redpony88

so possibly it could have something to do with the dizzy, as in stator, tfi. or it could be ecu related? since there's no power to the pump?

mysticstriper

Yes, it will continue to run as long as gas is being poured in. I don't know if the injectors are pulsing, all I could do is chack with a test light and it showed to have voltage to the injectors. if I take out the single hot wire there will be no power at all to the fuel pump.
What happened is, I work in Brazil for 32 days on then I'm home for 25 days. I parked it may 8th- it was running fine as always. When I came home it wouldn't crank. I checked spark which was fine so I tried a little gas in the TB and it cranked right up...for a few seconds. So here I am trying to get it running, it's one of the most important things I look forward to when I come home. Also ordered new gears and a bunch of stuff this time and it won't even start. I really appreciate any help yall can give me

redpony88

check fuses, hmmm odd that there's not voltage at the relay or anything.....
id say check ALL the fuses and be sure there's not one blown out before you go and trouble shoot the tfi, dizzy or the ecu.....