OlBlue

I didn't take that as a bash. If you know for certain, what I stated as guesses, then everyone learns and wins.

I don't see what I posted was misleading though??

Anyway, do you have any suggestions on how to get his rig running?

gmctd

He stated the truck runs good, but no power - indicates the ECM(?) is mostly functional.

No power is usualy due to no Boost control, so check that first.

The gages problem is more than likely wiring differences in the cab-to-engine\ECM connectors, due to production changes between '98.5 to '01.

Lay the connectors together, look for wires\pins that do not match-thru.

Those are the things I'd check first.

If the ECM didn't smoke at power-up, suspect it last.

Right?

Sorry - I'm a life-long GM man, where it is a PCM or ECM or TCM, depending on whether the transmission is also controlled.

OlBlue

Don't the 01s run a higher voltage for the Map sensor than the 98.5s? Perhaps the ECM is not "seeing" much boost because the 98.5 sensor voltage is lower?????

cummnz4x4pwr

OK heres the deal if it is a 2001 motor (no matter what year the truck) you leave everything and I MEAN EVERYTHING on the motor 2001 this includes harness computer any and all sensors---the pcm does not control anything on that motor at all so it has no effect on the way the motor runs. THE ECM MUST MATCH THE MOTOR(Because as stated before the voltages are different with the year changes, sensor changes etc...) the cummins comp. is simply that its the CUMMINS Computer Made to fit that motor.

im just trying to help here, I have done the swap several times


jake

Truckman

I am doing it the other way,, I start this Friday afternoon,, I am going to treat my NEW 2001 for my 1998.5 as a Long Block, All my sensors in my 98 Goes into the 01 any place on the 01 there is a sensor that's not on the 98 it gets a pipe plug And use my ECM,, I don't fore see any problem's BUT Murphy always shows up,,,

Truckman

New Engine is in ,, Just like I thought it would go,,2 Days,some snags,, Had to weld the wastegate actuator in the right position for the truck,,The engine I used had 8525 Miles on it ,It was from a 35 Passenger Bus That Burned,,So after the turbo thing it went pretty smooth,,Now have my first 100 miles on it..
And Just like I posted earlier,, The only sensor I had to changed was the map Sensor and my 1998.5 ECM runs the truck the same as it did with my #53 cracked block engine..I posted some photos of the transplant in my gallery....


Hi My name is Bob and I have been #53 Free for 2 Days and 100 miles now,,,, hahahaha haha

I just wanted to say a Big THANKS to all the good folks here who offered all the info that was needed to complete this Job.....

THANKS

99fl70

Ok, I am in a simular boat. Hope it floats. I bought a 99 FL70 It had a damaged cylinder form the tone ring coming loose. I bought a 01 Dodge motor. Moved the ECM and all sensors to the 01 motor. It starts and runs fine. Even good in first and second gear. After shifting to third and beyond, it is a dog. Cummins says I am where no man has gone before. I don't think so based on this post. The 01 motor did not have a tone ring or even a place to put one. I did not use it. My plan is to build an external tone ring like the 03's have. Is there an easier way. If I go back to the 01 ECM, it does not have all the sensor connections and doesn't look like it will plug into the Freightliner PCM.

Help

pro puller

This thread is a little old but im in the process of doing this swap.My truck is a 99 with a cracked 53 block & my new engine is a 2001 with no crank sensor or tone ring on the crank.Is there a way i can get around this or do i have to swap the crank shaft from the 99 into the 01 so i can use the crank sensor & tone ring with the 99 ecm & harness.Or should i use the 2001 ecm & harness & just plug them into my 99 truck harness.The 99 is a 5 speed 235 horse & the new 2001 engine is also a 235 horse but it was an automatic trans motor.Are there any wiring changes at the main plugs on the engine to body harness.Thanks for any help.

Kurt

Chad Mutters

What is the easiest way to correct this problem if it has already been put in Wrong truck runs but won't charge and no gauges

Bambi

Need some help with a swap I’m doin can you help me out

ecmexchange

Agreed about the ecu. DO not swap it, you will have more problems down the road.

Bambi

I have a 2001 computer but I plug it in and it still start like the motor knocking then it goes away
but no power and the tach is at zero.... do you I need to reprogram the ECM TO MY TRUCK since the
ecm is from a other truck