I am still getting poor mileage 400km per 80 liter tank.
I have the v6 vortec with the w engine.
The truck runs perfect but sure sucks the gas. It Starts hot and cold
with the flick of the wrist. It has a perfect smooth idle lots of power.
When cruising down the hiway I am barely on the pedal.
It was worse before I did some repairs now I am stumped. The idle
exhaust smells strong not like unburnt gas but like an old sixties v8.
Here is what I have done:
Checked for codes none found.
New air filter, cap, rotor, plugs, wires.
Fixed leaky vacuum lines.
Replaced the o rings and CPI unit inside of intake. (ouch $708.00
I removed the electronic EGR valve it seems ok it moves free and no
I found the fuel tuning valve stuck and fixed it.
I would like to know how do I test the o2 sensor and egr etc. with a
Is there an Eprom that might help me also?