I have a 2001 6nz cat with 670,000 miles on it, and for about 6 months I've had a vibration that I feel in the floor and "gas pedal". It's only under full torque. Replaced the clutch in Dec checked all the u-joints, yokes and all felt tight. But it is getting worse.
Any ideas?
I've got a 6nz problem.
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Robnozz, Apr 17, 2009.
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I would say maybe have your fuel injectors tested?? Does it feel underpowered or anything?
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Replaced the cam and injectors at the beginning of 2008, doesn't seem underpowered.
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Hmmm, injectors can be tricky. I put some in my c-15 when I had one and a few months later had to have 2 replaced. Could be something in the transmission...? Or Fuel filters? That would be an easy and cheap fix to try. That's why I no longer own trucks. Too much guessing. LOL
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Yeah I hear you. My feeling is it's in the motor, just doesn't feel like it's in the tranny. Thanks for the reply.
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No prob. I will ask a mechanic friend of mine in the morning and post anything he may think of for ya to check. Good Luck!
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Have you had your ride height checked or drive line angles?
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Don't know if this helps diagnose it, but it has been smoking alot more at start-up, whether it be a cold start, or a warm one. The smoke is white to grey colored. -
Do you know what your fuel pressure is? Does the engine idle rough at all?What about wide open under no load at operating temp?Was the stock cam put in?
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Have you checked the magnets in the diffs? I have had two trucks this month that had the same type of vibration and it was a failed bearing in a diff.
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