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06-23-2009, 10:49 PM
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#1
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no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
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I am new to this so if i am posting this wrong i do apologize . I have a 2006 mustang gt . when car is sitting still the rpms flukuate just a little , but if i turn air on the rpm will drop to 0 and kill car when clutch ingaged. I checked fuel pressure and fuel pressure is only at 35 and when acceleration givin the rpm actually drop instead of getting stronger . I have replaced fuel pump and fuel filter already . the only code the check engine light is a cam postion sensor, but ive heard that other people thought that was the problem and it was not 
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Chasity 
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06-23-2009, 11:03 PM
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#2
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Re: no fuel pressure ?
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Registered User
Join Date: May 2009
State: Illinois
Posts: 305
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35psi is about right at idle, could be a bit higher, but shouldn't be your problem. I wonder if the 4.6's have a fuel pressure regulator? could be an issue. I'm not familiar with the 4.6. Does the pressure drop when u give it gas?
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Gravel embeded in your back, scars on your hands, oil in your hair,rust in your eyes, and loving every minute of it. "The life of a backyard gear head" 
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06-23-2009, 11:08 PM
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#3
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Re: no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
Posts: 9
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yes it has a fuel pressure regulator but it is actually built on the fuel pump. so you can say it has been changed also i guess . the pressure does drop when you give it gas
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Chasity
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06-23-2009, 11:36 PM
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#4
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Re: no fuel pressure ?
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Registered User
Join Date: Feb 2009
State: Oregon
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has it been modded at all? i was really expecting an older car when i said the tps... still could be a possiblity, but i wouldn't suspect it on a newer model...
when did this all start? had anything changed around the same time this started that you can think of? maybe something within a couple weeks?
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It's cheaper to be beat a viper than to lose in one.
1994 GT, stock gears, stock shifter, stock engine, stock rims (or knock offs).
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06-23-2009, 11:45 PM
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#5
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Re: no fuel pressure ?
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Mustang Evo NEWB
Join Date: Aug 2004
City: South Bay Area
State: California
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Are any of your lines crushed or kinked?
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2003 Regal GS - the beater/daily driver - somewhat stock (yeah right). No its not a mustang, at least it's blown.
2001 GT Black on Black 5 speed
MM Strut Tower Brace/Weld-In Subframe Connectors/Koni Springs&Adjustables/Cobra Brakes/Cobra Rack/Tri-Ax/3.73s/SCT Tuner 56k miles
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06-24-2009, 06:41 AM
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#6
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Re: no fuel pressure ?
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Bob is Good.
Join Date: Jun 2004
City: Greenville
State: Texas
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Could be a leaking injector. |
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06-24-2009, 08:51 AM
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#7
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Re: no fuel pressure ?
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Brevior Est Vita
Join Date: May 2004
City: Iowa City, IA
State: Iowa
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your fuel pressure (if similar to 99-04) is right on. Autometer tells me 25-40 psi at idle.
The top gauge is my fuel pressure gauge.
Your fuel pressure should react like that. I'm not sure how you're measuring it (Schrader Valve and throttle blip?)
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2002 Sonic Blue GT, 5 Speed
Mods: MGW Short Throw Shifter, Mach 1 Brakes
Black FR500's, Eibach Pro-Kit, Bilstein shocks/struts, Borla Exhaust, Steeda Wing, Cobra R hood, Cobra mirrors, Terminator Front Bumper, smoked fogs/headlights, Tail-light Tint, Terminator side skirts, Grill Delete, Mach C-pillars, hood shocks
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06-28-2009, 04:22 PM
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#8
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Re: no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
Posts: 9
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I am testing fuel pressure by disconnecting the fuel line from fuel rail and hook it up that way. I do not have a schradier valve
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Chasity
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06-28-2009, 04:26 PM
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#9
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Re: no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
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My fuel pressure actually drops when i gas on mine. by the way your car sounds real good
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Chasity
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06-28-2009, 04:32 PM
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#10
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Re: no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
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not that i have noticed , just got it back from the ford place . they changed throttle body and a sending unit. 660.00 dollars. the throttle body did fix the problem with my car dieing when air is on when i am stopping . but did not fix my hesitation.
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Chasity
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06-29-2009, 08:43 AM
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#11
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Re: no fuel pressure ?
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WTF^^...
Join Date: May 2003
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State: Alabama
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ive heard that the 05+ cars are known for their hesitation in the gas petal vs go it can be set with a tune they say
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2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
MGW Shifter, Borla Stinger Polished Catback, JLT Intake, MM FLSF Connectors, MM C/C Plates, H&R Race Springs, IRS Bace, MRT Hood Struts, True Forged Mach 5 18x9 (275/35/18) 18x10 (295/35/18) wheels, Other Mods, My Pics, High Res Pics
400rwhp/380rwtq - Click mods for more info!
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06-29-2009, 01:27 PM
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#12
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Re: no fuel pressure ?
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Registered User
Join Date: Jun 2009
City: Brookhaven
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Ok thank you. Now are you meaning a tune as like a tune up or a programer ?
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Chasity
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06-30-2009, 07:42 AM
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#13
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Re: no fuel pressure ?
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Steve McQueen
Join Date: Apr 2009
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State: Texas
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He's talking about a hand held programmer. Probably my next investment.. 
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2008 Vapor GT:Borla Stinger, Hurst, AFM PowerPipe,Velocity MAF,Steeda Underdrive Pulleys, Hyper-Black CS69 Wheels, GMS Coil Packs
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