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Need help car wont start!


JeenyusVR4
01-13-2010, 06:18 PM
ok i just replaced my fuel pump cuz it wasnt turning. I went to start the car and still the pump wont turn on. i sprayed intake clean through the intake while cranking and the car wants to start so i know its a fuel problem but i cant figure out why it wont turn on. I just recently replace the relay as well. I have a fuel pump hot wire kit as well if that helps. is it possible that the sending unit is bad? i checked the wiring from the battery and theres not breaks in the wire or anything as well. any kind of help is greatly appreciated.

Stealthee
01-13-2010, 10:11 PM
You need to break out a test light and start checking for power. It should be a blue black wire at the fuel pump. If there is no power there go to the MFI relay. It is also blue black there.

Obviously you know the pump is good since you just replaced it but for shits and giggles run a hot lead to the fuel pump wiring harness and see if the pump kicks on. If it does, which it should, try to start the car. If the car starts then you are onto your problem in knowing its a power issue.

JeenyusVR4
01-13-2010, 11:35 PM
Ya i was thinking about the MFI. I took the hotwire kit power wire from the battery and touched it to the black/blue wire to the pump and it turned on. So i went to turn on my car and it turned on beautiful until the fuel ran out, so now im looking for a power issue. one problem that i had was after i diconnected the pump harness i took a look at the condition and what i found was that there was a broken pin on the male end but i looked it up and its the low fuel warning pin. So now my question is would that have anything to do with the pump not getting power cuz i can deal with not having that light if doesnt affect it. Im going to check power at the relay bypass and all the wires at the fuel pump. Are there any suggestions that i am missing cuz im sure there is. Thanks for the help so far stealthee at least im on the right track haha.

JeenyusVR4
01-14-2010, 04:02 PM
ok so i started checkin some more stuff today. i found out that the relay for the hotwire kit isnt getting any power so i tested the black/blue wire on the male side of the fuel pump connector and still now power from there.

so then i tested the fuel pump ballast resistor located almost underneath the intake by unplugging the connector and testing the resistance between the two wires and its comin up as OFL (open loop) on my multimeter.

my guess is that this is the problem but my question is since im not too familiar with the fuel pump resistor would that make it so no power can get to the fuel pump connector?

91STT
01-14-2010, 06:40 PM
they are two ways to do the hot wire mod.
one includes the resistor and the other doesn't.
are you sure you incorporated the resistor in your hot wire mod?
is there a fuse near the battery for your hot wire kit?
do you hear the mfi relay click when you try starting the car?
you may need someone to crank the car while you stick your head under the passenger side dash to hear the relay.
the low fuel warning wire will not cause a no fuel condition.
where is the hot wire relay installed, under the hood or inside the car?

JeenyusVR4
01-14-2010, 10:02 PM
ok so i traced down the black/blue wire running from the relay that i bypassed by the battery all the way to the fuel pump and i found where the connector wires run outside the car and back in the wires were completely corroded through.

i repaired the wires and now the fuel pump turns on and i started taking off the fuel rail loop and fuel shot out but not it seems like im getting no spark!

just to make sure fuel wasnt the problem i took off the y-pipe tube and sprayed intake cleaner throught it while carnking and there is not difference in cranking meaning fuel is good now but im on to a spark problem.

Whats the best things to start checking on the ignition system? of course to check the fuses and realys but im not 100% on what the best approach is. Thanks for the help i really appreciate it.

Stealthee
01-14-2010, 10:19 PM
You probably need to look into your CAS. It sounds as if you didn't have the hotwire method you wouldn't have fuel either.

JeenyusVR4
01-14-2010, 10:29 PM
Oh ya i dont really know what this means but when i cranked the car i could see a small arcing happenning right where one of the plug wires connects to the ignition coil.

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