I wonder if anyone can help me with this, My van is a 1990 G30 5.7 tbi with a TH400.
I had problems with idle some time ago and a mechanic here in the UK tried to fix it.
Unfortunately, he took the engine service bulb out after switching my ECM.
I now have a 1227747 ecm with the original chip...he says.
I am trying to buy from the US another correct ECM & chip but I have a feeling it should be a 1228747
I don't know what ECM came with the van from new.

The reason for changing is that the engine runs badly, is terrible on mileage and after replacing the bulb the engine service light keep flashing fast.
When I get the code I get 51 ECM fault.
I have another problem in that the van has no injector spray just suddenly & won't start, I don't think this is related, probably fuel pump just gone.

Could you tell me if I should get the 1227747 or 1228747?
Also is the ebay remapped chip for the 1228747 any goon in case my chip is no good?

I really want to get this running well as I have a list of mods I want to do.
Many thanks.
Andy.