2001 Pontiac Grand Prix engine has no spark

CKAFRIEND

MEMBER
2001 PONTIAC GRAND PRIX
6 CYL
FWD
AUTOMATIC
97,185 MILES

My 2001 Grand Prix has no spark for the engine to start. I had the coils and the ignition module tested and there was no problems there. The plugs and wires are new. I replaced the ECM and the Crank sensor, but still have nothing. What else could cause this problem?

4 Replies

JDL

MECHANIC
16,098 POSTS

Hello, I'd have to do my own testing, as far as the wiring circuits. I would'nt replace anything without testing the wiring circuits.

What is the litre size of your vehicle? Are you missing anything besides spark, is there an injector pulse, during cranking? Any codes?

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Thursday, March 26th, 2009 AT 11:00 AM

CKAFRIEND

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2 POSTS

The engine is a 3.1L. I don't know what you mean by injector pulse, but there were no trouble codes when I used the scanner to check them.

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Thursday, March 26th, 2009 AT 11:31 AM

JDL

MECHANIC
16,098 POSTS

The 3.1 shows to have two separate crank sensors. I'm not sure which one you replaced? The one I usually think of first is the one that plugs into the ignition module. I can't tell you that sensor is faulty, I'd have to look at it.

If you do a lot of cranking and the injectors are pulsing, you may have flooded the engine, check the plugs.

You could use a noid lite on the injector plug, crank the engine, if the noid lite pulses, there is voltage and ground at the injector/s. You could probably use an led testlite to check for pulse.

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Thursday, March 26th, 2009 AT 12:36 PM

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