MAF, purge

2002 PONTIAC GRAND PRIX

187,000 MILES • 3.8L • 6 CYL • AUTOMATIC

VICKI JACKSON

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Received codes for MAF, purge valve, and o2 censors. Replaced them all.
Codes for o2 sensors gone, the others remained. Realized the fuse for MAF and purge was blown, replaced it, codes were cleared, but returned.
Then the fuse blew again.
What could the problem be?

Jun 25, 2017 at 12:54 PM

STRAILER

CERTIFIED EXPERT
53,854 POSTS

Hello,

I am showing a MAP sensor instead of the MAF sensor I hope that is correct. You must have a wire touching ground somewhere here are some engine wiring diagrams (below) and a guide to show you hoe to test the system and find the problem. You are checking resistance to ground. Just for fun though disconnect all of the injectors to see if the fuse blows.

https://www.2carpros.com/articles/how-to-check-wiring

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken

Images (Click to enlarge)

Jun 27, 2017 at 3:28 PM