P38A Engine turns over but not starting

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Update- I have now fitted a second hand Genuine SAGEM, engine cranks over fine but does not fire, although there is still only the one pulse of the injectors, spark plugs fire correctly. This is with the original engine ECU.
I have also got a Genuine GEMS 8.2 Engine ECU all numbers match my original, but when this is fitted the dash ignition lights come on, but when I turn the key to start there is nothing & all the dash lights go out.
So I assume it will have to be synced to the BECM some how before the engine will crank over.
Thanks for your help.
 
storm said:
Update- I have now fitted a second hand Genuine SAGEM, engine cranks over fine but does not fire, although there is still only the one pulse of the injectors, spark plugs fire correctly. This is with the original engine ECU.
I have also got a Genuine GEMS 8.2 Engine ECU all numbers match my original, but when this is fitted the dash ignition lights come on, but when I turn the key to start there is nothing & all the dash lights go out.
So I assume it will have to be synced to the BECM some how before the engine will crank over.
Thanks for your help.
Click to expand...

If the BECM and Engine ECU do not have the same security code you are going nowhere.
 
storm said:
yes, but is there anything I can do to get them to have the same code? or is it the end for breaking a good car with only 66580 miles!
I just don't know what to do now.
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Nanocom or other decent diag. Pity you're so far away or I'd pop over. I cannot take that kind of journey at the moment with my workload. @Wazzajnr seems to get about a bit. Not sure if he visits Kent though.
 
Grrrrrr said:
Nanocom or other decent diag. Pity you're so far away or I'd pop over. I cannot take that kind of journey at the moment with my workload. @Wazzajnr seems to get about a bit. Not sure if he visits Kent though.
Click to expand...
Pete12345 very kindly popped over with his Nanocom but it came up ECU locked, so could not do anything. I'm not sure if a sync mate would fix it. I have the original ecu that cranks the engine, the replacement one does nothing when the key is turned so although i was told it was tested I don't know if it is any good or just needs coding?
 
Grrrrrr said:
Maybe one of the real gurus has an idea? @Rick-the-Pick or @wammers ? Has @mozz smith had a go at it yet? @martyuk might have an idea but he's off working away at the moment.
Click to expand...
I have not had anything from the guys you mentioned.
Heres a bit more info which may help, a friend came round with a Snap on Diagnostics machine last night. With the original engine ecu connected & with the diagnostics reading the engine details she started !! & run smoothly with no black exhaust.
But once the machine was disconnected it would not start just cranked over. Tried the replacement engine ecu & the Snap on machine connected, dash lights came up, then nothing when turning the key.
 
When u plugged in your snap on dish did u copy ecu code to ur becm otherwise I fink it may start but not rember code for nxt time
 
What I mean is, the snap-on tool obviously provided a connection to enable a start up, and whilst I'm no sparky it's likely a ground issue.
You need one of two things, expert help from on here or an auto electrician. They are all mobile and a local garage should be able to recommend one.
Sounds frustrating whatever the problem is.
 
myfirstl322 said:
What I mean is, the snap-on tool obviously provided a connection to enable a start up, and whilst I'm no sparky it's likely a ground issue.
You need one of two things, expert help from on here or an auto electrician. They are all mobile and a local garage should be able to recommend one.
Sounds frustrating whatever the problem is.
Click to expand...
My original engine ecu has a burnt track on the circuit board, hence why I got a replacement unit with all matching numbers, but when the replacement is connected there is nothing when the key is turned.
It run with the original & the Snap on diagnostic.
 
When it turns over while just cranking do you see anything on the Rev counter?
If you recently had the Crank Sensor replaced for a very good reason I would suspect the new one and/or its wiring.
Not sure why having diags attached makes any difference, but clearly it does in some strange way.
 
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