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04-13-2008, 09:04 AM
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#11 (permalink) | |
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Forum Member
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Re: Hesitation @ WOT
Quote:
-Coil packs -PTU -re-gap spark plugs -spark plugs wires -FPR -ECU I believe I found the problem, is something related with FUEL, when I just start the car (at idle) Im getting a 11.x A/F ratio with a 38psi of fuel pressure and 13.x volts to the pump. after few minutes (warms up) the fuel pressure drops to 20 or bellow and start running lean, A/F ratio readings of 18.x plus. what could be causing the Fuel Pressure to drop? btw Im running a Walbro 255 lhp External Fuel pump
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04-13-2008, 12:56 PM
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#12 (permalink) | |
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Forum Member
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Re: Hesitation @ WOT
Quote:
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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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04-14-2008, 10:01 AM
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#14 (permalink) |
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Forum Member
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Re: Hesitation @ WOT
check the voltage at the pump when it drops..
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Dynamic Racing Stage II Heads, 15G TD04L Turbos, DSM SM Intercoolers, HKS SSQV BOV, K&N Air intake filter, DNP intake Y-pipe w injection port, Blitz Duel SBC Boost Controller, ACPT Carbon Fiber Drive Shaft, DENSO 550cc Injectors, Denso (Supra) fuel pump @ 43psi, Split Second Arc2 Fuel Controller w GM maf, Fuel Lab Adjustable FPR, Autometer Fuel gage on rail with loop upgrade, Magnecore 8.5mm spark plug wires, Snow Performance Methanol Injection with spray indicator led, Prosport Boost, EGT gauges AEM UEGO Controller with Wideband O2, Cianci Custom hand made 3-pillar gauge pod, G-force steel braided brake lines, ATR downpipe, Greddy Single Shot Exhaust, NGK copper plugs, PWR aluminum radiator, RPS aluminum flywheel, RPS Stage III clutch Polyurethane Motor Mounts, 3sx steel braided turbo oil feed lines I love the smell of boost in the morning.... smells like.... VICTORY!!! - Apocalypse now |
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04-14-2008, 05:45 PM
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#15 (permalink) |
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2 Time Member of SBC
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Re: Hesitation @ WOT
Chris your front 02 voltage was .8 -.10 for the entire pull we did. Not sure why this would affect your car in closed loop mode.
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   Green 1995 3000GT FWD-TT 8:1 // ATX to MTX // NA to TT // Completed in 2005 // Purchased 11/12/02  White 1999 3000GT Black Dash/Tan Leather Interior // SOHC // MTX // Stock Daily Driver Purchased 7/25/07 Red.._1992 Stealth RT/TT Twin Turbo AWD // Project Car for AWD // Purchased 05/19/08   <-- Click Here Join FL3S |
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04-14-2008, 07:09 PM
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#16 (permalink) | |
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Forum Member
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Re: Hesitation @ WOT
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True. this issue only happens in open loop mode. Last edited by chask : 04-14-2008 at 07:14 PM. |
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Re: Hesitation @ WOT
