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Old 03-18-2013, 20:35   #1 (permalink)
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Major problems

New to the board guys and had a major issue with my 2001 ford f-350 (5.4 gas). Well been having trouble the last 2 months with the engine running a cylander down. 1st time fixed a coil and took care of it for a week...bam then it started misfiring again. Same thing did another coil and it fixed it for less then a week. Decided to do another one today and it didnt fix the problem. so after trying to fiddle with all the coils just kind of gave up. So on the way home the truck got REAL loud and vibrating way worse then ever! Lost so much engine power it was unreal..truck was just running so rough it was gross. Finally pulled it in and smelt a weird smell. So out of the exhaust was like a bluish smoke that smelt like melted plastic. I was like wtf. So my question is I know have major issues here..but is the engine shot here u think or what?
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Old 03-19-2013, 17:27   #2 (permalink)
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Re: Major problems

Blue smoke usually indicates burning oil . Pull the plugs and see how they look and also check compressions .
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Old 03-19-2013, 19:30   #3 (permalink)
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Re: Major problems

Wow, sorry you don't understand what happened.
You 'cannot' continue to 'force run' the motor under those conditions.
What you did was likely melt the cats.
This happens when cylinders missfire and pass raw gas to the cats where is burns so hot in melts them internally and blocks exhaust flow.
What you smelled was the cats heating at over 1200 degrees under the cab and overheating everything around it. 1200 degrees is a bright red color in daylight.
Now you need to use a Scanner to retreive the codes and repair things right.
If the cats are melted, you have a huge extra expense all caused by the original missfire trouble.
It's time to have a good shop do the repairs.
Good luck. Let us know how it all goes.
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