Hello to all diesel folks! I have an issue with my old gen 1! When I get on the accelration pedal it starts to studder and tons of white smoke comes out the exhaust with patches of black smoke every now and then. When I let off the pedal it idles down fine.

I have eliminated it being air in the fuel lines, I ran a fuel line directly into the engine's lift pump from a 5 gallon container of diesel.

It will sit and idle fine all day, it will even accelerate fine at about half throttle but when you step on it, it looses power, studders, and bunches of smoke.

Anyone with some advice will be greatly appreciated!

 

My truck did it once when i had bad fuel I put in some 911 fuel conditioner in it BAM runs good.
It is the time of year the fuel stations have switched to winter blend or did they???

 

You haven't eliminated a bad lift pump.

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