|
|
amcculloch
New User
Apr 11, 2007, 9:15 PM
Post #1 of 2
(1615 views)
|
i have a 1989 gmc 3500 box truck with the 454 got it from a friend for free it sat for about 2 years i replaced the fuel pump and drove it home but it wont idle down i cant figure it out i cleaned the throttle body and it didnt work any suggestions
|
|
| |
|
|
way2old
Veteran
/ Moderator
Apr 12, 2007, 5:38 AM
Post #2 of 2
(1610 views)
|
|
Re: 1989 gmc idle
|
Sign In
|
|
If it is idling really high, look down in the throttle body and see if you can see a small part of the intermediate gasket on the throttle body that has been sucked inside. This will cause a vacuum leak and the ECM is compensating with more fuel. More fuel and more air equals more rpm's.
Being way2old is why I need help from younger minds
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 