No spark

NOBLE LATHROP

MEMBER
2000 PONTIAC GRAND PRIX
3.8L
V6
2WD
AUTOMATIC
300,000 MILES

My car was running rough and was throwing a mass airflow sensor code. I replaced it and the MAP sensor. After I replaced them the car started and ran great for about a minute then shut off. It is getting fuel and air but no spark.
I've replaced the camshaft and crankshaft position sensors and still have no spark. I don't know what it could be. I also swapped the ICM and coil packs with another car with a 3.8 and the other car ran great.

1 Reply

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

Okay, this could be a problem with the electrical connector or the wiring going to the Crankshaft Position Sensor [CKP]. In the diagrams down below I have included the Power-train Management wiring diagrams for your vehicle with the CKP circuit highlighted for you. I have also included a guide on how to find unwanted resistance in an automotive electrical circuit with the voltage drop method. You will need to use a Digital Multi-meter [DMM] to implement these guides and here is a link to a guide explaining how to do that below:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and get back to us with what you find.

Thanks,
Alex
2CarPros

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