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did you personally have this as a good running setup before it was parked up over that time and know 100% it was never touched

100% never touched the dta from dtawin

Without doubt something has changed or been changed since you last ran the car, things don't changed on their own.

Have you tried reloading the Known working Map? Surely you have kept a copy on your PC or a memory stick. This sometimes fixes things if your ecu map has been corrupted.

Tony.

The problem is the original map was overwritten when i started entering the ecu as i saved the ecu map b4 i started. I realise i should have renamed it and backup that way to keep history.
Engine now starts but stalls within half a second. Waiting for sparkplugs. Fuelpressure and injectors work so i suspect now its spark plugs.

So the answer to my question twice where you said nothing had changed from it working previously........something had in fact changed.

It is unlikely spark plugs will cause the engine to start briefly, then stall.

More likely it is not getting a suitable amount of fuel/air if you have now confirmed good spark on all cylinders, and at a sensible time.

Try reducing fuel by a lot...then trying to start.
Then gradually increasing a bit at a time until it starts to show some life. That will at least give you a starting point for how much fuel it might want for a cold start.

Oh dear, you really should save your original working map/s, always a base to return to if a problem like yours occurs.
There will be nothing wrong with the P8Pro.
Seen it so many times.

Tony

stevieturbo wrote:So the answer to my question twice where you said nothing had changed from it working previously........something had in fact changed.

It is unlikely spark plugs will cause the engine to start briefly, then stall.

More likely it is not getting a suitable amount of fuel/air if you have now confirmed good spark on all cylinders, and at a sensible time.

Try reducing fuel by a lot...then trying to start.
Then gradually increasing a bit at a time until it starts to show some life. That will at least give you a starting point for how much fuel it might want for a cold start.

Ive just changed the fuel pump as the old one was stuck due yo 3years standing and the old petrol was bad so i have drained fuelystem. The new pump is a cheap aftermarket bosch type.. ive got no fuel pressure gauge but will install one to see if i get around 3 bar fuelpressure which i believe should be ok. I got inline filters fittet before and after the pump. There is a lot of pressure on the fuelrails as i noticed when cleaning the injectors. It might be too much but than the factoy inline pressure regulater may not work although return line throws fuel back in tank.

And now even more has changed....

3 year old fuel would be a bad starting point, so absolutely it needs fresh fuel.

I thought you had already confirmed you had fuel ? But if you're saying the fuel pump is "stuck".....that must not have been the case ?

And lets hope you've used suitable filters...many do not.

To be clear the first thing i did beforebstarting in the first place was drain all fuel and renew the pump filters and fresh fuel before starting. Than i cleaned injectors and tested them too.