Third gen rough idle and stalls at a stop
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Junior Member
Joined: May 2024
Posts: 14
Likes: 1
From: TX
Car: 1991 Camaro
Engine: 3.1L
Third gen rough idle and stalls at a stop
1992 RS
when I first turn the car over it’ll start up nice and idle ok then once I’ve drove it around a good couple minutes it will rough idle and stall at stops (only at stops), I have to go into neutral and keep it alive if traffic is bad, or a long red. When I got the car and was driving it for a month I then discovered it didn’t even have an air filter… could my injectors be clogged, need replaced, or hose em with choke spray ? Clogged fuel filter ? What would y’all think could be the culprit and/or recommend
(I haven’t replaced much since I bought it but I need to or else I won’t have much of a driving car huh
(new “mechanic” aka monkey 🔧
any help would be appreciated guys!)Joined: Sep 2000
Posts: 2,504
Likes: 195
From: Moorpark, CA
Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: Third gen rough idle and stalls at a stop
Start by giving it a solid tune up (new plugs, wires, air filter, fuel filter, oil & filter, etc.). It's much easier to trouble shoot when you know the basics are covered. While you're knocking out that stuff, replace as much of the rubber vacuum hoses as you can. Old rubber cracks and leaks air. Once you've taken care of all that, then get back to us on if it's still stalling.
Supreme Member




Joined: Jan 2004
Posts: 2,322
Likes: 100
From: So. Ohio
Car: 88 Camaro
Engine: L98 350
Transmission: 700r4
Re: Third gen rough idle and stalls at a stop
On my 88 the AIR system check valves were all leaking wide open letting exhaust back up and for some reason this seemed to screw up the idle. You might look into your minimum idle setting too.
Thread Starter
Junior Member
Joined: May 2024
Posts: 14
Likes: 1
From: TX
Car: 1991 Camaro
Engine: 3.1L
Re: Third gen rough idle and stalls at a stop
Start by giving it a solid tune up (new plugs, wires, air filter, fuel filter, oil & filter, etc.). It's much easier to trouble shoot when you know the basics are covered. While you're knocking out that stuff, replace as much of the rubber vacuum hoses as you can. Old rubber cracks and leaks air. Once you've taken care of all that, then get back to us on if it's still stalling.
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