I had the timing belt and water pump replaced a few days ago on my 97 LS teg. Now when the car is idle (after it warms up), the RPMs tend to decrease/increase slightly. This was definitely not the case before as the car would idle steady at 750 RPMs. I've also noticed my car has lost some power when driven at higher speed. Any help would be greatly appreciated..

Thanks!

 

Have you tried changing your spark plugs and wires? That helped me some...also you might want to change your fuel filter.

 

I haven't changed spark plugs or wires. I'll try do it this weekend. Thanks...