91 firebird
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Junior Member
Joined: Feb 2012
Posts: 6
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Car: 91 firebird
Engine: 3.1 v6
Transmission: auto
91 firebird
The problem i am having is the car is idling too high. It is idling at 1800rpm in park and 1300rpm in drive. How do i get it to idle down?
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Thread Starter
Junior Member
Joined: Feb 2012
Posts: 6
Likes: 0
Car: 91 firebird
Engine: 3.1 v6
Transmission: auto
Re: 91 firebird
just got the car. no vac leaks or any kind of leaks. also need a new trunk latch whole assembly. know where to get one? changed the throtle positioning sensor and the guy we got it from changed the timing
Last edited by Bobby Higgins; Feb 8, 2012 at 05:25 PM.
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Joined: Sep 2010
Posts: 1,928
Likes: 1
From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: 91 firebird
If you can't afford to take it to a shop you'll have to get your hands dirty. Buy a manual (Chiltons is OK) and start reading. There are lots of things to check/replace. Spark plugs can give you a clue as to how it's running. Vacuum gauge to check the vacuum. Test the fuel pressure. Distributor cap, rotor. Assorted sensors. Maybe clean the idle control valve. The list goes on. If you can get hold of some basic test equipment. A digital volt meter is really useful. Make sure everything is connected right. And double check for vacuum leaks. Then.....
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iTrader: (1)
Joined: Sep 2010
Posts: 1,928
Likes: 1
From: Georgetown TX
Car: Base 91 'bird
Engine: 3.1 v6
Transmission: 4L60
Axle/Gears: 9-bolt 3.27 & PBR
Re: 91 firebird
Why was the timing changed? It should be factory spec (10 btdc?) unless something else was done that would require a change. There is no idle sensor. Do you mean the idle air control valve? If so was it installed correctly and are the passages and seat all clean? I've got a complete spare hatch pull down but haven't look at it in detail yet.
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