4 wheels aren't as fun
Join Date: Jun 2005
Location: Cincinnati, Ohio
serpentracer is offline
Re: 98 s10 rough idle when warm ( P0300 - random misfire )
my missing and missfire code was from my EGR valve. mine is the electronic one. this is one thing you will need to test with a scan tool etc, you don't want to spend $200 for it for nothing.
after a while a code for the egr valve came on so I replaced it, and the missfire problem went away with it.
so how do you know the 0442 isn't the gas cap?
02 sonoma 4.3L auto
97 sonoma 2.2L manual
Last edited by serpentracer; 03-27-2009 at 08:17 PM.