Car won't run with check engine light off

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Apr 10, 2005 | 11:29 AM

white91z28

Thread Starter

Registered User

Joined: Feb 2003

Posts: 48

From: Louisville, Kentucky

Car won't run with check engine light off

I have a 94 lt1 and for some reason my car won't run with the car out of safe mode. I have replaced the opti spark and coil no help. The only way it will run is with the MAF disconneted. And yes I have replaced that too and no help. What could be the problem. PLEASE HELP

Last edited by white91z28; Apr 10, 2005 at 11:33 AM.

Apr 11, 2005 | 05:35 AM

slopokrodrigez

Registered User

Joined: May 2003

Posts: 2,275

Re: Car won't run with check engine light off

On a 94, the same power line bringing 12 volts to the MAF, also carrys 12 volts to the PCM, the theft detterent module and the fuel pump relay. On each one of those devices, it's the pink wire. If anyone of those has a problem where it's pulling the 12 volt line down, it will effect the other devices on the same 12 volt line.

Measure from the pink wire to ground at the MAF connector with the MAF unplugged and with it plugged in with a multi-meter.