Common Idling Problem
I have a '97 Sable that has what I've found on the forums, to be a very common problem, yet no-one seems to have a positive cure for.
When the car is idling in gear, with the A/C on, it has an intermittent miss.
I have replaced the the IAC, the DPFE, cleaned the throttlebody, fixed any suspect vacuum leaks, and cleaned the MAF, with no change.
I guess the plugs and wires are next.
Something else, as the engine misses, the lights momentary dim. I put a meter on the battery and it drops by about a half a volt during the miss.
I think one of the problems with the forum system is when some people do finally figure out there problem, they don't come back and tell everyone what they found.
I going to knock this out and when I do, I'll post it.