If you do not have a tune the injectors are most likely the issue. 550cc are not stock. Stock injectors should be 19# injectors which I don't know what "cc" that is.
You can not change injectors or MAF without the code changed on the DME or you will have a major rich situation. Do not run the car like this or all that gas will wash the oil off the cylinder walls and scuff a piston.
Run the stock injectors with the RRFPR and you will be ok but 15psi will be too much boost for the RRFPR to flow so tune down the waste gate for 10psi or less.
Best of luck. Tunes for the turbo 318 are coded by Barrie at Midnight Tuning. He is BMWCONNECT on this board |