Engine Performance problem
1995 Chevy Lumina 6 cyl Front Wheel Drive Automatic 155000 miles
My son's Lumina has an intermitent problem. It has the 3.1 V6 and 155,000 miles. It routinely runs like a top. Very recently when you get in the car and start it up the engine will idle between 400 and 1400 rpm. It will not settle down. If you try to accelerate it will surge and hesitate. As the car slowly gains speed, the engine smooths out and runs fine, idles at 750 when you come to a stop, and runs like normal. Once it gets through this it won't happen again for another day or so.
If you shut the car down and restart, it will sometimes cure the problem. I have changed the plugs, wires are about a year old.
Could this be a mass air flow vale, O2 sensor, ignition pack?
Thanks for the help,
have the same problem?
Saturday, March 13th, 2010 AT 3:32 PM