A year ago at 61,000 miles I had to have the heads replaced due to the engine overheating. After having the work done I had to change the alternator because the engine was running horrible.
After replacing the alternator, the engine ran a lot smoother, but still had a small rough idle. The rough idle was more present when the truck was in gear and not moving. I then started getting a code stating that there was a Cylinder #4 misfire.
After replacing the # 4 fuel injector, all spark plugs, wires, distributer cap, rotor and ignition coil the engine ran better, but still had a slight rough idle.
After replacing all sensors on the throttle body and then cleaning the throttle body, the engine ran like new. Just a few months ago the rough idle started again. I once again got a Cylinder #4 misfire.
This weekend I replaced all 8 fuel injectors, changed all the spark plugs and cleaned the throttle body again. The rough idle is still there.
When I start the engine, it revs up high, then idles back down to normal, When I put it in gear, the entire truck shakes a little and seems hesitant.
It seems as though the rough idle is more present when sitting at a stop light in gear. When not in gear the rough idle is not as bad.
I am running out of options. I just rolled over to 70,000 miles.
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Sunday, March 15th, 2009 AT 7:10 AM
