I have a Chevy G20 Van 1989. The problems seems to be: Sounds like it is burping or coughing air up and out the carburetor, the Idle sometimes slows and stalls. Runs fine at normal speeds and coughing sometimes is not present. But when slow to Idle that is when the coughing sound begin the Idle slow the vehicle may stall The Map sensor and throttle position sensor has been replace.
Wednesday, May 8th, 2013 AT 4:52 PM