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01-03-2019, 03:22 PM
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(Thread Starter) |   Not Ranked : 0 score  Fuel pressure occasionally plummets Hello I'm relatively new to this forum and currently wanted to reach out for a little help I drive a bone stock 2007 mazdaspeed6 I do have an accessport running the stage 1 91 tune, other than that there's nothing else done to the car. Recently the fuel pressure occasionally plummets and I get a code for a fuel pressure regulator low circuit I believe. The pressure is normally sitting around 330 while I'm at idle and around1600+ while driving (hpfp act. on accessport) but occasionally it will drop down to well below 100 and hesitate badly starving for fuel. Sometimes just for a few minutes sometimes longer. My question is, could this be the high fuel pressure pump or the in tank pump with the regulator or even another issue? Any help would be greatly appreciated and thanks to anyone that takes the time to read this. I just don't want to throw parts at it if it can be avoided and the correct part can be purchased first. |
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01-04-2019, 01:35 PM
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| Not Ranked : 0 score I think I would pull the HPFP and clean it...or at least take a look at it first because it is pretty easy to get to and disassemble.
__________________ 2013 Speed3 w/ tech Autotech HPFP Cobb APV3 ETS TMIC JBR 3.5in SRI UR catless DP Corksport TP Corksport Hoodscoop JBR RMM Stratified e30 tune Other Stuff: 1992 Jeep Cherokee 202,000 miles (salt/snow work horse) 2009 Toyota Rav 4 (wife has to drive something practical) 2012 Yamaha R1 Full Two Brothers exhaust & ECU flash |
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01-05-2019, 06:31 AM
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 Join Date: Jul 2016 Location: Near Charlotte NC
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| Not Ranked : 0 score When the fuel pressure drops, does the AFR go crazy rich?
__________________ '06 MS6 GT-167k Miles(Forged@157,116) Manley Pistons & Rods, King Bearings Stock Head/Cams, Stock Int/Exh Manifolds Versatuner, 3-bar MAP, ITV22, CP-e TMIC CS Turbo/DP/RP/HPFP/BPV/R-DiffMount White Widow F-DiffMount, Whiteline RSB Rear Russian Bushings, Poly FSB Bushings Magnaflow CBE, ACT 6-puck/Streetlite JBR Tru-3.5/3-port EBCS/EGR-D Damond RMM/PMM/OCC/PCV Plate Other rides: 2014 F-150 XLT SuperCrew Ecoboost 2002 Tacoma ExtCab 2.4L 5spd 2WD 2004 Olds Alero ECOtec 2.2 - Broken History: 2008 GSX-R 1000 - Stolen 1988 RX-7 TII - Sold (13.467 @ 105.44) 1985 Camaro - Sold (est. 265bhp 5.7 swap, Edelbrock intake & Hooker headers) |
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