Mechanics

IS IT POSSIBLE TO MANUALLY ADJUST THE IDLE W/ FUEL INJECTION

Pontiac Grand Am

Is it possible to manually adjust the idle w/ fuel injection in a 91 Grand am?
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Mishkam
February 16, 2007.




Yes it is possible. However it is (almost) never a good idea. Generally the throttle plate adjusting screw is sealed. It is sealed because if the idle is high it is usually a vaccum leak and adjusting the screw will only mask the problem, and can cause more damage by causing a lean condition.

Unless you had a backfire that bent the throttle plate, I would not touch the adjusting screw. The throttle body may be clogged up from the EGR or the IAC may not be working properly.

Tiny
Mmprince3000
Feb 16, 2007.
Its actually idling just a tad low while in drive. Which is causing a vibration at low end idle.

Tiny
Mishkam
Feb 16, 2007.
Then I would check the timing first. It may also be the throttle body plate is clogged up from EGR soot or the IAC passage is clogged.
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Tiny
Mmprince3000
Feb 26, 2007.

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