I have a used ecm for my
truck since mine is no longer running my engine properly and failing. Plug and play or dealer needs to program?

 

What year is your truck?

 

2001, running extremely rich, 5 mpg rich. New cap rotor plugs wires coil and injectors. Haven’t replaced the distributor itself, timing without the trucks computer control is at 1 degree advance as close as I could get to 0 when going through everything. Full exhaust system with cat and sensors, factory intake manifold with Hughes kit and a cold air. Any other info needed haha

 

Dealer needs to flash the PCM with the correct VIN for the truck, else things like ABS, and SRS, will whine about it.

Moving the distributor doesn't change ignition timing, it changes injector timing. If you are too far off with that, it will run absolutely terrible. Need a scan tool to properly set it. (fuel sync.) (have the dealer do it while you are having the PCM flashed.....)

Have you checked your plenum yet? (see the stickied thread at the top of this forum.)

 

I did use a snap on scanner to check fuel sync which I set with system off to 1, with fuel sync still off it ran a little better and with it back on it got a little happier just still runs crappy, and I had done the Hughes plenum kit to knock that issue out. Now if I just plug in the ecm I should be able to drive it to the dealer right?

 

Yeah, the 'new' pcm should run the engine just fine, just abs, and srs will likely be disabled.

 

Well I plugged it in and no issues, srs and abs still functional! I do have one question for you buddy, you think either of these have death flash?

 

Probably both of 'em. It was pretty standard.

 

Well the replacement came out of a 98 5.9l, was told it was a pre death flash update but I was hoping someone had a code list for the update and what numbers I should be looking for

 

According to theory, there is only like 4 horsepower, and 20lbs of torque different..... (though, people have spent a couple hundred bucks to GAIN that kind of power....) Best bet is to just get an aftermarket tuner, and call it a day. Make sure you flash the PCM to the correct VIN first though.