No High Idle on cold Start up.
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Junior Member
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Joined: Jan 2007
Posts: 94
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From: Rhinelander, WI
Car: 89 Formula
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9 Bolt 3.27
No High Idle on cold Start up.
I started my 89 Bird with a 305 TBI and I no longer have a high idle speed on initial start. Runs ok but no high idle. Ideas?
Senior Member
Joined: Feb 2010
Posts: 258
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From: in my car
Car: 1987 Gta Trans Am
Engine: 383 Stroker
Transmission: t-56
Axle/Gears: 3.47 02 SS rear end
Re: No High Idle on cold Start up.
Not completely sure, but could be a coolant temp sensor or maybe o2 sensor defective, making the car think its already hot on start up and defaulting to closed loop.
Senior Member
Joined: Feb 2010
Posts: 258
Likes: 0
From: in my car
Car: 1987 Gta Trans Am
Engine: 383 Stroker
Transmission: t-56
Axle/Gears: 3.47 02 SS rear end
Re: No High Idle on cold Start up.
No problem. You can find out whats wrong more effectively by 2 ways. Easiest would be a scan tool. Just crank it up and see what values are for the 02 sensor and check freeze frame data from crank up and check coolant sensor. Next would be a multimeter. Look up what values the sensors SHOULD be at and see what you actually have and go from there. Good luck.
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