1991 Firebird Idle problems.

91FIREBIRD305

MEMBER
1991 ALL OTHER MAKES ALL OTHER MODELS

Its a 305 with 171 miles on it,
The car was owned by a buddy of mine and I finally bought it from him :D
Well finally for my question,
When I start the car it idles high, around 1000 rpm or higher, I have to let it sit for a few before I can drive it so it will idle down, kinda sounds like a miss in it also, thats just when its in idle, it drives fine, the tranny jerks into gear when I go into reverse, or over drive.
The wires were changed, but he said the plugs looked brand new when he checked them, anyone know how I could fix the idle problem?

5 Replies

91FIREBIRD305

MEMBER
3 POSTS

Let me get into more Detail,

At 8am this morning I start her up to get to work, she idles above 1000 rpm's and about five mins later she idles fine.

Someone has to know something?

Sorry for sounding like a @$$, but I need some help.

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Monday, July 3rd, 2006 AT 9:49 AM

91FIREBIRD305

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3 POSTS

Ok, well no answer. Meh.

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Thursday, July 6th, 2006 AT 9:09 PM

DODGER

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1 POST

1000 RPMs is about normal for an idle speed. I have a '97 firebird myself and it starts out at 1200 RPMs and then drops down to a steady 1000.

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Thursday, November 9th, 2006 AT 12:32 PM

GAMSO

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7 POSTS

Um adjust your throttle that will control your idle thats what I did.

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Sunday, December 7th, 2008 AT 11:21 PM

JDL

MECHANIC
16,098 POSTS

How long since a tune-up? Any applicable trouble codes? Check the temp sensor. If this has a map sensor, but no maf, a vacuum leak can cause the idle to go high. The leak may seal after engine warms?