engine idle speed

[anniegreensprings]

can anyone tell me what the engine idle speed should be on a 1992 350 LT1. mine is idling at 500 RPM, it seems a little low. i was told you cannot raise the idle up because it is controlled by the computer. would changing
the idle air control valve help? thank you for your time.

 

[Schrade]

Any other symptoms? Any codes, current or history (check engine light)?

 

[vetteoz]

500 is ballpark but your IAC passages could be carboned up and your TB might need good clean along with resetting the TPS /IAC..
As asked above ; are you having other idle problems?

 

[dogfish246]

Sounds Good! My 96 LT1 runs at 450rpm-500rpm in drive when fully warmed up, and 750rpm in neutral...:cool

 

[anniegreensprings]

500 is ballpark but your IAC passages could be carboned up and your TB might need good clean along with resetting the TPS /IAC..
As asked above ; are you having other idle problems?

no, every other things seem to be working alright. i'll try giving it a good cleaning and resetting the TPS and IAC. thank you all for your help. what a great website this is.

 

[gmjunkie]

no, every other things seem to be working alright. i'll try giving it a good cleaning and resetting the TPS and IAC. thank you all for your help. what a great website this is.

Wont do any good to try to set the TPS!! It's non adjustable the ECM does it automatically!! :L:L:L
But it won't hurt a thing to clean the IAC and Passages!!

 

[Dog House]

Does this hold true for an 1989 as well that you can not set the TPS?