EGR Stuck?
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Junior Member
Joined: Dec 2024
Posts: 62
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Car: 1991 RS 305TBI
EGR Stuck?
I've been chasing a rough idling issue and I'm inspecting my EGR valve on my 91 tbi. Should I be able to press the EGR closed by pushing on the diaphragm with the engine off? If I try to push on the diaphragm through the EGR "window", it will not budge at all.
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: EGR Stuck?
Yes, you can typically move them by hand. If you have a vacuum pump, you could also try to move it with that.
Joined: Dec 2004
Posts: 16,734
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: EGR Stuck?
not sure how your pressing. You can only push up to open the valve.
Supreme Member
Joined: Feb 2011
Posts: 1,589
Likes: 89
Re: EGR Stuck?
Everyone who can't remove EGR from the computer tune.
Disable the EGR, don't remove it from the computer tune = nothing but problems with detonation and fueling.
EGR isn't evil. No reason to disable it.
Last edited by Schurkey; Mar 20, 2025 at 03:35 AM.
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