Vehical: 1999 Chevy Silverado Z71 4x4 Extended cab,. 5.3 liter automatic
with 143k miles.
I've had this truck for almost two years now and it had 89k miles on it when
I bought it. I'm about to (if I can afford it) replace the plugs, wires, and
at the very least both pre cat O2 sensors here pretty quick because I have
no idea when the last time any of these part were changed and I'm sure
I've always had a problem with the motor missing when it's hot out but it's
not limited to just when it's hot sometime it'll do it cold but it's
certinally worse when the weather is hot and the truck has been driven for
wahile. I normally run regular unleaded (86 octane) and have tried running a
tank of 89 octane through her and nothing really seemed to change.
The check engine light has come on several times since I bought it but it
always either goes off by itself over time or can be reset wtih a scan tool
and it wont come on for another extended period.. The only code I can
remember pulling are knock/miss codes, you'll have to excuse me I can't
remember the code number off the top of my head.
Besides the fact that I want and really need to change these parts anyway
does anyone have any ideas what else I need to look at? What about the knock
sensor itself? I honestly think that the O2 sensors are the biggest part of
my problem next with plugs and wires.
Suggestions Welcome before I go spending money I don't have! :)