I own a 1996 chevy monte carlo 3.1. I have had this problem for quite a while now and it just seems to be that i'm chasing a ghost. The engine stumbles upon startup and and the RPM's jump erratically between 800-1100 RPM's. When I go to move the car (ex. Reverse, drive, overdrive) the engine stumbles and sounds and seems like it's going to stall out all together. If I manage to get it up to speed, it runs great. If I don't it tends to stall out and not start back up until I let it sit for a few hours. I know i'm moving in the right direction but this car is nickel and dimeing me with all the parts i'm buying for it. So far I have replaced the IAC valve, throttle position sensor, spark plugs and cables, and the ignition module. I will soon be replacing the coil packs but I want to know beforehand whether I should spend the money on them. Any insight from anyone who can give me a clear answer on this problem? Any thoughts and help will be greatly appreciated.
Monday, August 29th, 2011 AT 11:14 PM