Starting Saturday, my truck has been idling very roughly and making about 8mpg (compared to 16 earlier that day). It doesn't vibrate when you give it throttle though. I cleaned the throttle body, changed the oil (to Royal Purple), replaced the spark plugs with Bosch Platinum 4, checked the plug wires, distributor car and rotor, replaced the coolant temperature sensor, put cleaner in the gas, checked and cleaned the EGR valve, checked vaccuum lines, and everything else I can think of. It's still making plenty of power like it used to but it's getting about half the gas mileage and idling very rough (shaking the whole truck like a 454). It sounds like it's running on about 4 cylinders at idle. I'm thinking it might be an exhaust valve or two because the tailpipe sucks in air about every stroke (if you hold a dollar or piece of paper at the end, it sucks it in) If you have any ideas I would really appreciate it.
P.S. I recently replaced the fuel filter too.
-Evan
2006-11-22
10:30:56
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7 answers
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asked by
Evan
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