Knocking Power Loss

[2INSANE]

Hello! I have an 83 Gmc 6.2 diesel truck Civilian I just swapped a Cucv J code with new injection pump on it. Only 30,000 miles. Started knocking loud and loss of power. Happens when at idle while in gear. Any ideas will help?

 

[cucvrus]

Are the transmission to engine bolts tight? Are the Torque converter bolts tight? That would create both issues. Have you checked the oil? I would check all the fasteners. These are my ideas from afar. Good Luck.

 

[2INSANE]

Transmission bolts are tight, torque converter is tight. Fluids are full and new.

 

[snowtrac nome]

check oil verify good oil and pressure look for metallic flakes in the oil the loss of a rod bering is enough to drop compression so an engine wont fire. if the engine is mechanically sound I would think it is a fuel knock the result of a bad injector. you can find which one by cracking lines until the noise goes away

 

[2INSANE]

I checked oil. Still super clean with no metal shavings.

I found the problem. It was a bad injector. When the motor was cold, I started it up, opened the hood and put my hand on the exhaust manifolds on each cylinder. Each one started to warm up except 1. I replaced that injector and filled the fuel filter with ATF and full bottle of Seafoam in the tank. The noise went away and I have more power then ever! Thanks again for all the help!