Misfire, tough idle - fuel injector issue?

[xchen]

Originally Posted by ard

You need to program each injector's 'flow compensation value' into the DME. So BMW injector or no-name, still needs to be coded.


The challenge, IMO, is with these aftermarket parts, who knows if they are actually measured properly.


If the DME doesnt have the correct calibration, that one cylinder can be too rich or too lean- each causing their own issues.


But Im not convinced it was a cylinder/injector issue- did you chase down the other paths raised in this thread? (or the other- I lost track)

Thank you Art: No I have not been able to start chasing potential vacuum leaks. JFOJ has mentioned using a ODBII tool (for which I have one) to monitor Fuel Trim values for identifying vacuum and crankcase air leaks and I have posted request for HOW.