1982 GMC S15 computer

1982 GMC S15
153,000 MILES • 4 CYL • 2WD • MANUAL
Avatar
JOHN BLAYLOCK
  • MEMBER
  • 1 POST
starts up great ,but at above a scarey red line rev, or full blast! This is th 2.5 pontiac with a 300 rochester fuel inj. throttle body. Is this possibly a computer reset if so how?
Mar 9, 2010 at 2:57 PM
Advertisement
Avatar
SERVICE WRITER
  • ✓ASE Certified Mechanic
  • 9,123 POSTS
  • ASE Certified Mechanic
I would look for a vacuum leak. Disconnected hose or a cracked one.

Try flexing hoses and see if there are separations, cracks at connections etc.
A smoke machine could flush out a vacuum leak fairly easily.
Mar 9, 2010 at 6:46 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.