In Reply to: Anyone ever use GM Top Engine Cleaner. posted by Paul G. on October 19, 2001 at 10:50:29:
Bought spray can for $7.00. It says to spray in carb. Keep RPM's around 1000 because it will be rough and may stall. Yes it did! I install it directly into the intake manifold through the AC temp vacumn pickup. I removed the top sprayer from the can. It leaves a small plastic tip that is a perfect fit for rubber vacumn line tubing about 1/2" long. I pushed directly up on the can and it discharged into the base of the manifold. Left it alone for 15 minutes. Start up was fairly rough and lastled about 20 secs. (medium amount of smoke) Results: smoother idle and feels like smoother acceleration.