Re: Lean Misfires at 2700-2800 rpm
I found a few small boost/vacuum leaks and I fixed them. This didn't help the lean spot at 2800.
I didn't get the chance to test for exhaust leaks, but I think there must an exhaust leak on the front bank, before the O2 sensor, because according to the NBO2 sensors my front bank is always slightly leaner than my rear, but when I pulled my downpipe last month, the front was black (rich) whereas the rear was white (lean). This would also explain why I'm getting misfires in the 2200-2800 rpm range (closed loop), but not in the open loop 2200-2800 rpm range.
Declan
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'91 VR4 - Modlist: DR650R turbos, Snow stage 2D alky kit, DSM SMICs, blowthrough ported LT1 MAS, Dejon Tool intakes & y-pipe, Blitz DSBC Spec R, HKS SSQV BOV, PTE 580cc injectors, Dual feed fuel system with Aeromotive FPR & filter, Hotwired Supra pump, HKS DLI, MSD Wires, Apex'i S-AFC II, MAFTranslator, Turbobob ECU, Scanmaster III, LC-1 WBO2, ESP downpipe, Vac/EGR delete, Gutted precats and test pipe, Maximal solid mounts, 300m 18 spline output shaft, Centerforce Dual Friction clutch, RPS flywheel, GC coilover conversions with helper springs, Powerslot slotted rotors, Goodridge SS brake lines, Hawk pads (front), Stillen metal matrix pads (rear)
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