In Reply to: Try different approach... posted by Luxo M3 on May 15, 2001 at 10:24:45:
pull spark plugs out and grab some STP carb cleaner and a flashlight.
Flash light into cylinder and see if you can see the head of the piston. Should be fairly silvery or metallic still.
If you see black..you got some serious carbon build-up.
Spray the carb cleaner into the cylinder. You don't need too much. The stuff eats up carbon like water.
Start car. With car running...
Pull an intake line or TRY to get the carb cleaner "straw" into the intake system AFTER the flow meter. Spray and friend runs idle a tad higher. This should help clear carbon off the intake valves.
OK so what the hell am I saying?
The Carbon build-up up in a higher mileage motor will do a couple of things like lower-compression, mess up the power phase of combustion and even cause detonation on even mildly warm days. Clearing up some of this carbon should help a lot.
If that is the issue.
Just an idea.