Originally Posted by
Karlos G
If he suggests a Bayjoo chip to sort the fuelling then he doesnt know what he's talking about! Any MFI chip will simply remove the boost cut (some also alter the spark adv curve but not many), fuelling is set by adjusting the EMFPA on the side of the metering unit.
well tbh karlos, thats how ive always thought fuelling is setup, via metering head. ecu is purely to remove boost limit. they also said the backfire was prob boost cut, at 15psi!! this was prior to the run on the rollers but it turned out to be lean. hence the backfire. the owner seemed to know a bit and suggested a chip AND fuelling setup, not using a chip to magiclly get the fuelling to suit whatever boost is run although i can se how its interpreted. its only one of the employees that made me have initial doubts. no real benefit in a chip if it can hit 15psi then? do boost gauges lie to THAT extent?? i could do with visiting one of the ford specialists really, someone who deals with m.f.i regular