Idle Problems... Engine Surges & BLM's @ 150
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Joined: Jun 2004
Posts: 647
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From: South Jersey
Car: 1991 RS Convertible
Engine: 96 LT1
Transmission: T5
Axle/Gears: 3.45 9-Bolt
Idle Problems... Engine Surges & BLM's @ 150
Hey everyone,
Im having issues with my 91 RS 305TBI. The car isnt running right at idle. The car surges & sometimes dies. I hooked a computer to it and found that the BLM's are almost always at 150 during idle. Im wondering if this has something to do with it? Im about to go get a new IAC valve, but I thought I would throw this up here to see if I could get any feedback before I wasted any money.
Thanks,
Mark Balistreri
Im having issues with my 91 RS 305TBI. The car isnt running right at idle. The car surges & sometimes dies. I hooked a computer to it and found that the BLM's are almost always at 150 during idle. Im wondering if this has something to do with it? Im about to go get a new IAC valve, but I thought I would throw this up here to see if I could get any feedback before I wasted any money.
Thanks,
Mark Balistreri
Thread Starter
Senior Member
iTrader: (2)
Joined: Jun 2004
Posts: 647
Likes: 1
From: South Jersey
Car: 1991 RS Convertible
Engine: 96 LT1
Transmission: T5
Axle/Gears: 3.45 9-Bolt
I have two possible solutions.
1) IAC valve is bad. (Cheap & Easy)
2) A cylinder misfire would cause lots of extra oxygen to go through the exhaust system. The O2 sensor would pick up this oxygen, tricking the computer into believing that the engine was running lean. Thus, adding all of the extra fuel. The extra fuel could make the car not idle right.
1) IAC valve is bad. (Cheap & Easy)
2) A cylinder misfire would cause lots of extra oxygen to go through the exhaust system. The O2 sensor would pick up this oxygen, tricking the computer into believing that the engine was running lean. Thus, adding all of the extra fuel. The extra fuel could make the car not idle right.
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