Mechanics

GMC SAFARI SENSOR PROBLEM

2000 GMC Safari

Electrical problem
2000 GMC Safari 6 cyl Two Wheel Drive Automatic 140000 miles

My van wont start whenever the air is damp. I have replaced the spark plugs and wires, rotor, dist. Cap and the mass air flow sensor. Do you have ideas on what else I can check. No codes show sense it hasnt started when it is having the problem. On dry days it starts right up and runs good.
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Cbintegra
March 17, 2010.




Hi
Try this on dry day engine starting get a spray bottle with water. Spray then Ignition Control Module they try and start if starts do same to crankshaft sensor.
See diagrams


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_405.jpg


http://www.2carpros.com/forum/automotive_pictures/198357_Grafic_3_107.jpg


Let me know
Thanks for donate

Docfixit
Mar 18, 2010.
Thanks alot, man! You probably saved me hundreds that a mechanic would have charged. I sprayed water on the crankshaft sensor on a dry day like you advised and it didn't start. Put a new one on and sprayed it and it started right up. The real test will be in a few hours when it rains, but I'm pretty sure that fixed it. You know what you're doing! Thanks again.

Tiny
Cbintegra
Mar 21, 2010.
Glad to have helped Yea could have turned into a Money Pit. Come back if you need help in the future

Docfixit
Mar 22, 2010.
I was wrong. It is raining today and the van would not start again. The only thing I havent replaced is the ignition control module. Any other ideas?

Tiny
Cbintegra
Mar 22, 2010.
Check out vehicle control module left side engine compartment. See if rain water getting on VCM. Pull connectors see if its wet.

Docfixit
Mar 23, 2010.
I checked out everything I could see without taking it apart. Nothing seemed wet.I give up. Taking it to a mechanic tomorrow. Thanks anyway
AD

Tiny
Cbintegra
Mar 23, 2010.

AD