6.5L TD problems - Diesel Bombers



Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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Old 07-13-2013, 05:02 PM
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Default 6.5L TD problems

I have a 95' Chevy 6.5 TD. Its kind of hard to start, I have to put my foot on the pedal a little and try and start it. I have to feather it till it will stay running and then its fine, but it has a miss. It smokes a lot when it is first started and until you drive it a ways then it will stop. It drives fine for a little then it will start missing. If you try to get on it a little when you pull out of while you're driving. It hesitates/breaks up and carries on. I'm thinking it might be the optical sensor or PCM that is throwing the timing off etc. Can anyone help me?
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Old 07-13-2013, 09:28 PM
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First thing is to make sure the lift pump is pumping when the engine is running-it is powered by the oil pressure switch in stock form and they fail quite often-AC Delco ONLY for OPS replacement.

Also google "OPS relay mod" for long term reliability.

Also check for trouble codes.
Google OBD1 paperclip code reading.
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