ECU has to be synced with BECM. I have helped 2 local mechanics do this, both cases they narrowed the issue down to faulty pins on ECU giving/receiving bad info from O2 sensors, rovers still ran though.

Bought used ECU to swap in and ended up with a car that wouldn't start. I used my Autologic to sync them.

 

I bought a used ECU and it was installed today and the truck started for a minute and then shut off.

So as most people say, it needs to be synced, or the VIN needs to be changed or what not.

Is this something that is easily done? Are there any ways around this? Does the computer have to be in the truck to reprogram it?


I have the truck sitting in a shop now and after spending a fortune working everything out. I just want to now get this programmed.

I would even pay for someone local to me to come to the shop and reprogram it so I can just get it going.

You guys have been so awesome, but this has been an absolute nightmare for me.

Thanks everyone.

 

Where are you? Helps if you put your location in your info...

 

You could send your new ECU, and old BCU to someone with a D2 and the correct computer and they could probably help you out. I should buy an old D2 just so I can do this, I've got a suitable computer.

 

Did it run for a whole one minute ? Or was it few seconds ?

 

It was a few seconds.

 

I would check fuel pressure. At the mechanic, they should have the manometer to rule that out of possible hurdles.
Or make it sniff starting fluid. Or both.
Come back with findings.

 

This is normal for a ECM/BCU sync issue. From Rave, "However, if the ECM has an invalid BCU security code the engine will crank, start, and then immediately stall."

 

see if you can read codes, you should have some codes for the sync issue now.

 

What computer do I need? I would love to be able to get this done without towing it somewhere and unfortunately mailing my ecu and bcu away might take too long.