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10-11-2012, 05:57 PM
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(Thread Starter) |   Not Ranked : 0 score  Fuel Pressure dropping when slowing. idle is pretty consistent around 420-440 cruising 1000-1200 WOT 1600+ My questions is when i am downshifting, and using my gears to help slow the car, I see my fuel pressure drop to about 300. Is that normal? As soon as i put the clutch in, or touch the gas, it jumps back up. Best example would be if you are going down a steep grade and you are using the gearing of the car to help hold the speed down instead of using the brake, the pressure will drop to around 300 and hold there until i put the clutch in and it jumps back up to 400+
__________________ 2010 Black Mica Corksport: RP, SRI/TIP, Cold Airbox, RMM Inserts, Mudflaps JBR: SSP & Bushings SURE: Boost Tubes COBB: Accessport Other: AT Internals, 35% Tint, DDM 6k HID, NGK Plugs My car is being rfinkle(d) with! VD: e85 tune 283hp/333tq  |
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10-11-2012, 06:00 PM
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Normal
__________________ 2010 Mazdaspeed 3 Black Mica w/ Tech Package Insalled: Corksport SRI/TIP // Cobb AccessPort// Autotech Internals // Corksport LED Kit // Corksport Stubby Antenna // Forge v2 BPV // JBR SSP// JBR 80a RMM // JBR Weighted Shift Knob // ETS TMIC // Corksport Catless Downpipe // Corksport RacePipe // Denso itv22 // Stratified Guardian Angel // block8head Defrost Pod // Prosport Boost Gauge // Zoom Boom Box Awaiting Install: HTP 3" TIP // HTP Battery Tray // Sure 3" MAF // Stratified Boost Dial  |
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| The Following User Says Thank You to Dmurray06 For This Useful Post: | MazdaBoy2.3 (10-11-2012) |
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10-11-2012, 06:02 PM
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The engine doesn't use any fuel when you are engine braking, so yeah, not a problem.
__________________ 2012 MS3 Stratified 91 Cobb AP | UR FMIC, TP, CBE | Autotech Internals Forge v2 BPV | Denso ITV22 | SURE Aeros Full3 ID283* JBR 88a RMM/TMM, 70a PMM, OCC, RSB, TIGs, Coolant bypass, EGR delete, Bushings, Knob Aeroforce Interceptor | Pennzoil Plat 10W-30 | FoMoCo XT-M5-QS 15% Tint *Product is advertised as ID300 |
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| The Following User Says Thank You to Keko For This Useful Post: | MazdaBoy2.3 (10-11-2012) |
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10-11-2012, 06:07 PM
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Thanks guys. I Appreciate it.
__________________ 2010 Black Mica Corksport: RP, SRI/TIP, Cold Airbox, RMM Inserts, Mudflaps JBR: SSP & Bushings SURE: Boost Tubes COBB: Accessport Other: AT Internals, 35% Tint, DDM 6k HID, NGK Plugs My car is being rfinkle(d) with! VD: e85 tune 283hp/333tq |
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| The Following User Says Thank You to MazdaBoy2.3 For This Useful Post: | Dmurray06 (10-11-2012) |
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10-11-2012, 06:08 PM
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you will see your AFR go up to 29+ oh and brakes are cheaper than engine ... but i guess if your doing it to prepare for a corner .. that's understandable
__________________ 08 MS3 () Arias Pistons & Pauter Rods, P&P Head, Port match IM, DCR VVT, ARP Head Studs, F2 BSD & Baffle, Cobb AP, Cobb SRI, PG TIP, CS Test Pipe, FMIC, Tial QR, JBR RMM/TMM, Oil spin-on Conversion, Autolite XP5263 () Koni Yellows, Roadmagnet springs(6.5k Front, 6.4k Rear), Enkei GF1/Ferderal RS-R, Cobb RSB, TB trunk brace, AWR Rear Endlinks, SPC rear camber arms, ATE Super Blue Brake Fluid () Fidanza 11lbs. Flywheel, E4P STS, Cobb Shifter Weight, TWM Bushings, Redline MT-90 |
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10-11-2012, 06:17 PM
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| Join Date: Jul 2012 Location: Clifton Springs NY
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Thanks again! Matt
__________________ 2010 Black Mica Corksport: RP, SRI/TIP, Cold Airbox, RMM Inserts, Mudflaps JBR: SSP & Bushings SURE: Boost Tubes COBB: Accessport Other: AT Internals, 35% Tint, DDM 6k HID, NGK Plugs My car is being rfinkle(d) with! VD: e85 tune 283hp/333tq | |
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