91 Rough idle after warm up
Thread Starter
Instructor
Joined: Jan 2005
Posts: 145
Likes: 0
From: Ft.Worth Texas
91 Rough idle after warm up
One day about two weeks ago my 91 vette started missing after it warmed up.Ran fine on the higher rpm but would miss and stumble at start.Changed plug wires,plugs,cap,rotor,checked all vacuum lines,egr,etc.all ok. Smells a little rich,milage is irratic on panel 14-35,on highway.Thanks for any help. 02 sensor?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
It could be the O2 sensor, IM, injectors, TPS, MAF, ect. Is your SES light on while driving? Not trying to sound rude but there are many things that could cause this and checking for codes would be the first step. 
Instructor
Joined: Apr 2006
Posts: 117
Likes: 1
From: east haven ct.
Originally Posted by rcr103
One day about two weeks ago my 91 vette started missing after it warmed up.Ran fine on the higher rpm but would miss and stumble at start.Changed plug wires,plugs,cap,rotor,checked all vacuum lines,egr,etc.all ok. Smells a little rich,milage is irratic on panel 14-35,on highway.Thanks for any help. 02 sensor?
