I have a vacuum leak and an IAC problem

1993 GMC VAN
313,000 MILES
Avatar
TMACMONA
  • MEMBER
  • 1 POST
1993 GMC Ventura Van, Scan test reveals vac leak and IAC problem, Van is surging at stop, sometimes will not start unless d open butterflies), Replaced the following: Heat sensor, map sensor, IAC motor, AGR, PCV Valve, Main gasket on throttle body, checke
Nov 6, 2011 at 10:11 PM
Advertisement
Avatar
BILLYMAC
  • ✓ASE Certified Mechanic
  • 2,204 POSTS
  • ASE Certified Mechanic
This is telling you that the iac is failing. there is a oring on the iac sensor it is prob broken.yes this will cause surge or erattic idle
Nov 6, 2011 at 11:02 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.