Engine swap???

I should shouldn't say I have no tach. It sits on 100 at idle then moves to maybe 300 when revving. I would think if one of the sensors was bad it would throw a check engine light.

 

also noticed my water temp isnt reading. The gauge is pegged on the 250 side as soon as the key is turned. I also have codes now 46, 32, 13, 38, 26, 25. The engine I put in was from a 2001 Freightliner and it was put in my 2004 Peterbilt 379. Does the pete have a computer that the engine ecm isnt communicating with?

 

The 6nz did have a partial rebuild done. It got new rings, O-rings on the liners, all new bearings, new valves and guides in the head, reman injectors, and new seals and gaskets all around. They did run test it so I don't think the harness is bad. Ill have to check fuses on batteries to ecm. Would the pins on the ecm be different for some reason?

 

I saw another post where someone did the same swap and had the no tach problem, but no one answered. I pm'ed Mr. Haney on another site. I'm sure he will be able to point me in the right direction

 

I talked with Kurt today. The tach issue just requires it to programmed to my truck since the ecm came from a freightliner. The codes are most likely not active and just stored. It is having issues with low power and a bad stumble when driving. I found that to be a fuel pressure issue. Going to change the check valve/pressure regulator Monday. If that doesn't do it Ill change the transfer pump