87 5.0 TPI idle high
Thread Starter
Junior Member
Joined: May 2008
Posts: 47
Likes: 0
From: VT
Car: 87 GTA
Engine: 5.0
Transmission: 5spd
Axle/Gears: 3:45
87 5.0 TPI idle high
Does anyone know why the idle will stick more on a high idle when the temp outside is colder,verses when it's warmer?? It doesn't much when it's warmer..But still idles like **** till motor is warmed up near temp. Temp sensor??? Thanks
Senior Member
Joined: May 2002
Posts: 845
Likes: 0
From: Northern California, Redding
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
Re: 87 5.0 TPI idle high
An intake vacuum leak that seals when the heat makes the metals expand? A bad IAC motor?
Member
Joined: Mar 2005
Posts: 132
Likes: 0
From: Tyndall AFB, FL
Car: 1985 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: garbage 2.73
Re: 87 5.0 TPI idle high
Your question is kind of misleading. Sounds like youre asking whys the idle stay fast longer on cold days than on warm days. Thats simple.....it was designed that way. Now if you think you may have a problem....it could be a few different things. Coolnat temp sensor, depending on the year it could be a crappy cold start valve, or on later models the cold start fuel enrichment protocol could be jacked.
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