Mash gas pedal, clatter increases for split second and quits.
Does not happen in cooler weather.
EGR syst. OK
87 or 93 octane, no difference.
Air filter cln.
Plugs 20k mi.
oil chng, 3 - 5 k mi.
Drive 90 mi./day, all hwy. 55 - 85 mph
MOONSTER_TOOLZ 10/15/2010Did you check ignition timing if correct? Check for over-advance ignition timing. Also it is a possibility that your EGR valve is stuck closed and your compression ratio in the combustion chamber is high. Moreover a defective knock sensor can also be the cause. Have you done with scan tool service? If not, I recommend having your engine scanned to retrieve trouble codes stored in your computer.