The truck starts right up, whether it's cold OR hot. When the truck gets up to operating temperature, it will ping terribly - (THE WORST PINGING I'VE EVER HEARD) mostly at part throttle. It seems not to ping so much under WOT, but it bogs and smokes big time.
(None of this behavoir happens when the truck is cold)
After getting the infamous code 32, I replaced the EGR valve and EGR module. It didn't fix anything - the EGR port was blocked with carbon. Next I removed the intake and cleaned the sludge (lots of sludge from the previous owner) from the top end and had the intake soaked in an acid hot-tank for a weekend. The truck STILL pings very badly once it gets warm (when it's cold, it runs fine) and it's smoking quite a bit too.
It has a new O2 sensor and a fresh set of plugs. New MAP sensor, and the EGR vacuum lines are clear. The timing is set to 0, as it's supposed to be. Stock exhaust, stock thermostat, stock everything.
I'm stumped. Any ideas?
have the same problem?
Saturday, November 10th, 2007 AT 5:25 PM