Ok just recently I had a problem with hesitation with my 2003 Monte Carlo 3.8 Cleaned Maf and Throttle body... Today it died on the free-way now it will not stay running at all. Had to have it towed to my house. Any ideas????? Much help appreciated. Thanks

 

Was it running rough before you cleaned theMAF? Any codes? Any symptoms leading up to the current state?

 

Cleaned the maf and throttle body 2 weeks ago. It has had a hesitation problem that started at that time. Its not throwing any codes. Today went out and it started but my rpm"s are going from 700 to 1100 up and down when idle's.

 

What is the mileage and when was the last time plugs/wires were changed?

 

The engine is not the original this engine has about 85k on it. The owner a a stealership is who I bought it from . I have not changed the plugs or wires yet.

 

I'd check clean the IAC..

I also recommend changing out the MAF..
be sure it's an ac delco...DO NOT USE AN AFTER MARKET BRAND!

 

I had a stalling problem on my '02 and it turned out to be the cam shaft sensor.

 

Thanks for your help guys.

 

Posted a few days ago about my 2003 monte 3.8 won't stay running changed out the ICM no change. Thinking it maybe Crank shaft sensor????? I start it cold runs a few minutes then the RPM"s go up and down then it dies. Then won't start. Errrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr LOL Any more ideas?????

 

I'll give you a bump so more knowledgeable members might respond