IAC issues

1988 CHEVROLET SUBURBAN
Avatar
WACKOSIREN
  • MEMBER
  • 2 POSTS
1988 Chevrolet Truck V20 3/4 ton Sub 4WD 5.7L TBI 8cyl

Replaced the IAC. When it was started ... it raced like a bandit. Turned it off and disconnected the battery for 30 minutes. Now it will not start at all. Acts like it is not getting any gas. Any help would be appreciated.
Jun 9, 2012 at 10:52 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
when you replace the iac, the valve is fully retracted and will settle down in a period of time. removing the battery cable was not a good idea. you wiped out the memory of the computer and it has to re learn all over again compounding the situation. give it about 1/2 throttle to start it and see if it idels. you may have to drive it for it to re learn.

Roy
Jun 9, 2012 at 11:13 PM
Avatar
WACKOSIREN
  • MEMBER
  • 2 POSTS
cant drive it cant keep it running. plz if it was me i would have takin it to the shop. i dont mess with electrical .... but the man has a friend who said do this. so this is where i am at not i have to try to fix it. i have been workin on vehicles since i was a kid, my dad taught me, isnt much i cannot do, but i do know what i dont touch.

i found an article that said i can re train it by jumping the block under the dash. is this possible? we used to get the codes out of the old vehicles by jumping with a wire.
Jun 9, 2012 at 11:32 PM
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
thats just code pull, nothing to do with re learn system.

try the battery thing again and see if it fires up

Roy
Jun 9, 2012 at 11:42 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.