Re: Lean Misfires at 2700-2800 rpm
I've put my car in storage now for the winter. While driving it on the highway to the storage place I couldn't even use 5th gear because this would bring me into the 2600-3200 rpm range that causes the missing.
When I would drive in 5th, it'd miss and I'd hear the bov blow off ever so slightly. If I stayed at that RPM point it'd miss constantly (or pulse) and I'd hear a chuff-chuff-chuff kind of sound from the bov. This made me wonder if it could be an issue, like Keithmac said earlier on re: pressure pulses.
An experiment I would have like to have tried (but ran out of time), would be to use of a blowthrough MAF setup and drive very slow, so as not to overspool the turbos, with the turbo piping disconnected from the Y-pipe. Without the turbos connected to the Y-pipe there would be no possibility of pressure pulsing and if it still missed in/around 2600-3200rpm then it would effectively rule in/out pressure pulsing as a cause of the problem. Has anyone tried this?
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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, ek2mfg plenum spacer, 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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