Re: Lean Misfires at 2700-2800 rpm
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Originally Posted by TurboBob
With the OBD-1 cars, you should be able to tune it to the rich side so that the trims are bottomed, and in that area of the map the O2 trim is running about 60 - 80 or so. That way, when it goes into open loop for the 16:1 area, it will be a little richer than it wanted when it sets the O2 trim at 100.
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I'm not sure if I fully understand what you mean. The problem I have isn't during open loop, its during closed loop under very low to light load, ie. at highway cruise, in 5th gear.
I've tried richening it up for the given rpm points (up to 30% more fuel) and it has helped to some degree (the car doesn't lurch as bad), but it still lurches. The only real fix I've been able to come up with is to cruise outside of that RPM range. 
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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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