Running rich after sitting
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Joined: Feb 2022
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Running rich after sitting
Hey guys, I have a 1989 Pontiac firebird with the 2.8 in it. When it sits over night it starts rough and idles rough until I drive it for awhile. Once I first start it, it backfires a lot and you can smell it running rich. Also while it idles it starts and then drops down to roughly 700-900 rpms. The check engine light also comes on when it runs rough. Any ideas what might be causing this?
Joined: Nov 2008
Posts: 2,093
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From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Running rich after sitting
Leaking or failed regulator, stuck injector(s).
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