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hesitation when driving

3207 Views 8 Replies 8 Participants Last post by  gtkane
I have a 1997 Safari van. Love it. It has this annoying "feature" of hesitating in moist conditions. We have done everything we can think of, from full tune-ups (replacing wiring, etc..). Spent many hours and much $. Been seen by at least 3 GM dealerships and the problem still recurs. I have tried gas line anti-freeze which I sometimes think has an effect. My regular dealership says this is a problem identified with this van with no cause or solution yet found. Any suggestions?
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I work for a GM dealer, and see this problem regularly.

It is an issue with the mass airflow sensor. This is what you do:
Remove the sensor
Remove the 4 torx bolts that hold it together
Take the 3 pieces apart, but note the direction everything goes back together
On the center peice, you will see 2 or 3(depending on the model) very small resistors. DO NOT TOUCH THEM WITH FINGERS OR SCREWDRIVER! They are very delicate and will break easily!
Spray them with brake parts cleaner and gently clean them with a Q-tip.(the back side of them will be really dirty)
Assemble the pieces exactly how they came apart and re-install.
Start up the van and be amazed at the power it has now.
Oh,yeah...when the dealer told you about "known problem with no solution as of yet...", that is dealership lingo for "we haven't got a f*****g clue, but we don't want to look stupid!

I'll admit that I have had to use that line once or twice in my career.
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