low rpm stumble
Thread Starter
Safety Car
Joined: Nov 2001
Posts: 3,632
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low rpm stumble
help ! i have an erratic idle , and a stumble/miss at low rpm's . so far i have changed the fuel pump , plugs , wires , cleaned the mass air , and throttle body . i have no engine smoke . 1986 l98 auto
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: low rpm stumble (markmaz)
I tend to have a surging idle in my 86 when it gets up to temp and sits for a little while. Did you replace the distributor cap? also try cleaning the IAC valve.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: low rpm stumble (markmaz)
you should be able to clean it with Carb Cleaner or something like that, i would run a search on IAC cleaning before going ahead with it
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: low rpm stumble (markmaz)
if the idle air control is clogged up then it will cause the computer to have a fit and screw up your idle
