GM Truck Club Forum banner
1 - 1 of 1 Posts

·
Registered
Joined
·
4,151 Posts
My 87 TBI 350 idles high because the main housing gets worn out where the main butterfly shaft runs through it so it hangs up and keeps the throttle cracked open a bit causing the high idle. If I quickly pop my foot on the pedal and let it pop up it will idle down to normal. I have been told you can have it worked over for a couple of hundred clams but I may just go with a aftermarket TBI instead.
 
1 - 1 of 1 Posts
Top