My car doesn´t start or has other problems: troubleshooting

Anything 4th gen TECH related

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91hatchligon
L3 - Bolt ons
L3 - Bolt ons
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Joined: Mon Nov 08, 2010 1:22 pm
Location: Utah

Re: My car doesn´t start or has other problems: troubleshoot

Post by 91hatchligon »

Sounds like either the ignition module or the coil.

Mac Listo
L1 - DPFI
L1 - DPFI
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Joined: Tue Jun 02, 2015 5:09 am

Re: My car doesn´t start or has other problems: troubleshoot

Post by Mac Listo »

91hatchligon wrote:1.When you turn the key to the on position can you here the fuel pump prime the system? it a buzzing/humming noise from the rear.
2. Are you getting spark when its not starting? If not is could be the coil or the ignition module.
3. Dose it seem not start more often when hot?
4. Have you had it die while driving?
1. I hear it prime when it starts and works. When it doesnt work it doesnt prime. Sometimes when it primes it turns over and starts and the idle slowly falls until it stops (about a 4 second process)
2. Yes.
3. I havent noticed it if it does but am curious to know.
4. No.

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91hatchligon
L3 - Bolt ons
L3 - Bolt ons
Posts: 394
Joined: Mon Nov 08, 2010 1:22 pm
Location: Utah

Re: My car doesn´t start or has other problems: troubleshoot

Post by 91hatchligon »

Sounds like the fuel pump from what you are describing.

Mac Listo
L1 - DPFI
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Joined: Tue Jun 02, 2015 5:09 am

Re: My car doesn´t start or has other problems: troubleshoot

Post by Mac Listo »

Fuel pump was replaced when this was happening with a 255lph Walbro.

Replaced:

Fuel Pump
ECU (p28 to a 072 both obd-1)
Distributor
Main Relay
Fuel Filter

From what I gather, there is no fuel pump relay or fuse for a 90 hatch. If there is, I am missing it if its not part of what the main relay does.

Mac Listo
L1 - DPFI
L1 - DPFI
Posts: 43
Joined: Tue Jun 02, 2015 5:09 am

Re: My car doesn´t start or has other problems: troubleshoot

Post by Mac Listo »

Never Mind. I dont know what that 4 blade relay is behind the hood release, but there is an even bigger relay in that area and I took it out and it smelt burnt. I am assuming THAT is my main relay...

caljank
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Joined: Sun Nov 22, 2015 8:35 am

Re: My car doesn´t start or has other problems: troubleshoot

Post by caljank »

Nice, summary of starting issues. I appreciate your time and effort.

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