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Truck belongs to my cousin...has 124k miles on it...Ran fine till the other day. Was going down the road then all of a sudden it lost power and starting knocking pretty bad is what he described. Was able to very slowly limp it home. I went over there today and looked at it...Oil looks good, no coolant in it. Started it and it didn't knock at all but idled VERY rough. After running for about 5 minutes I felt the exhaust manifold...Rear two cylinders felt very hot, the front two were not nearly as hot, I could actually hold my hand without getting burning on the front two, like they were not firing.
Pulled the spark plugs at those two cylinders and they were somewhat black and a little oily. Replaced with new plugs and started it back up...NO change. Distributer was tight and all wires appeard to be fine. Wires and plugs all changed about 2 years ago.
Also, exhaust sounded weird...Like a "bom bom bom bom bom" coming out of the exhaust, definitely sounded like a miss to me.
One thing I did notice was as I raised the RPM it seemed to smooth out.
Does not seem to be using much oil or anything. No real excessive smoke coming out of the tailpipe.
Any ideas???
Pulled the spark plugs at those two cylinders and they were somewhat black and a little oily. Replaced with new plugs and started it back up...NO change. Distributer was tight and all wires appeard to be fine. Wires and plugs all changed about 2 years ago.
Also, exhaust sounded weird...Like a "bom bom bom bom bom" coming out of the exhaust, definitely sounded like a miss to me.
One thing I did notice was as I raised the RPM it seemed to smooth out.
Does not seem to be using much oil or anything. No real excessive smoke coming out of the tailpipe.
Any ideas???