1991 GMC C1500 Droping RPMs

1991 GMC C1500
163,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
ROCKETT1420
  • MEMBER
  • 1 POST
Well when I'm driving slow (under 20mph) and take my foot off the gas the the RPMs imedietly drop from around 1000RPMs to almost 0 and my truck almost dies. It also does it as soon as I put it in reverse and push the gas it drops and it trys to die. Any suggestions what it can be or what I can do would be greatly appreciated. Thankyou
Nov 10, 2015 at 4:22 PM
Advertisement
Avatar
HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
check for a vacuum leak under tbi unit they blow in front or back
Nov 12, 2015 at 6:13 AM