low rpm stumble
11-12-2001, 12:22 PM
#1
Safety Car
Thread Starter
Member Since: Nov 2001
Posts: 3,632
Likes: 0
Received 0 Likes
on
0 Posts
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
11-12-2001, 12:47 PM
#2
Team Owner
Member Since: Sep 2001
Location: Athens AL
Posts: 59,654
Received 1,401 Likes
on
1,017 Posts
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.
11-12-2001, 01:57 PM
#5
Team Owner
Member Since: Sep 2001
Location: Athens AL
Posts: 59,654
Received 1,401 Likes
on
1,017 Posts
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
11-12-2001, 02:05 PM
#7
Team Owner
Member Since: Sep 2001
Location: Athens AL
Posts: 59,654
Received 1,401 Likes
on
1,017 Posts
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
