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#1449895 - 04/14/08 05:46 PM Fuel Rail Pressure Regulator
Scottishkiltman Offline
Member

Registered: 03/24/07
Posts: 107
I did a bit of searching and couldn't come up with anything, hopefully someone here can help.

I got a trouble code last week, it was P0172: system too rich (bank 1). I decided to take it to Ford, after the car died on me a couple times and misfired a tad.

They tell me it is a leaking "Fuel Rail Pressure Regulator" causing the problem. To get it fixed at the dealer will cost around 600 bucks.

So my question is, does this diagnosis sound right? Is it totally necessary to fix, and do I need to fix it immediately? and also is this something I could fix at home? I've replaced the intake manifold before, so I'm not incapable of serious engine work. Additionally they tell me I need to replace the PCM, can I also do this?
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Chad Johnson is my hero.

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#1449902 - 04/14/08 06:10 PM Re: Fuel Rail Pressure Regulator [Re: Scottishkiltman]
Sepiroth Offline
Over the Hill

Registered: 03/03/02
Posts: 2822
Loc: Kouts, Indiana
What year make and model is your car? Just for future reference, you gave the dealer the same info or they needed the same info to tell what car the tech would be working on, we kinda need to know the same

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#1449924 - 04/14/08 06:43 PM Re: Fuel Rail Pressure Regulator [Re: Sepiroth]
Scottishkiltman Offline
Member

Registered: 03/24/07
Posts: 107
Sorry, it just slipped my mind, the car is a 1999 crown vic.
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Chad Johnson is my hero.

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#1449928 - 04/14/08 06:45 PM Re: Fuel Rail Pressure Regulator [Re: Sepiroth]
Not_Gramps_Marq Offline
Over the Hill

Registered: 04/04/06
Posts: 1481
Loc: Southeastern, Wi
replace the PCM....I'd like to know how they diagnosed that one. Also, the fuel pressure regulator shouldnt be a big deal either. I think they just want to bend you over the counter.
_________________________
1999 Marquis LS. K&N Cone, 90mm Lightning MAF, 04 ZIP tube, Ported and polished upper plenum, Pro Prod polished intake manifold,
EGR delete, custom 2.5 inch exhaust with catless X-pipe and Magnaflow Muffs,. Stage 2 J-Mod, AMMX driveshaft, 3.73 gears with modified limited slip.
2005 GT rims with 1.5inch spacers and 255 series rubber

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#1450016 - 04/14/08 08:48 PM Re: Fuel Rail Pressure Regulator [Re: Not_Gramps_Marq]
Blue95 Offline
Over the Hill

Registered: 03/03/06
Posts: 2392
Loc: Past the Horizon
wow - time to run from this dealer.

A new Motorcraft pressure regulator is about $54 from Rockauto. It's a straightforward repair and for a change you don't have to crawl around anywhere, it's right on top.
_________________________

1995 P71-SOLD
2002 HPP-SOLD
badgeless grille-tinted tails-Hrbacek whiteface gauges-Pioneer spkrs-12" sub-reworked tranny internals-Sonnax/jmod upgrades-ceramic pads-urethane swaybar bushings-new timing chains/guides/tensioners-Granatelli plenum-75mmTB-MZT-NGKTR6 plugs-180d thermo-Steeda UD's-BOC 93tune-Thrush mufflers-LED interior/door puddle lights-Projector HID retrofit-MM corners-LED signal mirrors-17x8 TorqThrust wheels-235/55/17 Contental ExtremeContact DWS tires
2003 LX Sport-SOLD Hrbacek whiteface gauges-Pioneer spkrs-12"sub-reworked tranny internals-Sonnax/jmod upgrades-urethane swaybar bushings-Thrush mufflers-ceramic pads-Steeda UDs-LED interior/trunk/door lights-rebuilt 3.27 axle
Current = 2011 Silverado, time for a change

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#1450073 - 04/14/08 09:30 PM Re: Fuel Rail Pressure Regulator [Re: Blue95]
kustomizingkid Offline
Poobah

Registered: 11/18/06
Posts: 5070
Loc: Minnesota
the fuel pressure regulator is right on the fuel rail, a ten minute repair tops.
_________________________
2000 CVPI 121,000 miles

1998 Mark VIII Collector's Edition 110,000 miles


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#1450077 - 04/14/08 09:32 PM Re: Fuel Rail Pressure Regulator [Re: Blue95]
disston Offline
Climber

Registered: 06/28/07
Posts: 791
Loc: Maryland
I can see that most of what they want is for the computer. Can you find out, "What's wrong with the "puter?"

Change the fuel regulator yourself and see how it runs.

disston

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#1450215 - 04/14/08 11:22 PM Re: Fuel Rail Pressure Regulator [Re: disston]
Bigcarlover Offline
n00b

Registered: 03/04/08
Posts: 36
Loc: SC
Replacing the computer is often code speak for "we don't know what the eff is wrong, so lets just change the one thing we don't understand and that we can make a ton of money on."

Are they really claiming $600 for the regulator only?! Seriously what others said was right, this is a 10min job (they will still charge you at least a half hour though) and a $60 part. Is it leaking to the outside, or are they claiming an internal leak (if so, how do they know this?) Run away from these clowns and never, ever let them touch your car.

First make sure there is no outside fuel leakage of the regulator (safety first!). Then start looking at each plug on bank 1 to see if you have misfire. A bad cylinder firing will make it rich, and the O2 sensor can only average the firings. If it's not that you could swap O2s to opposite banks (this way you don't need to buy a new one if problem follow the bank 1 sensor.)

If not, you could pull the fuel rail, pressurize it (key on the engine so the pump runs, but don't start it) and see if any bank 1 injectors have a high leakage rate.

After you fix it, write a nice letter to Ford stating your dis-satisfaction with this dealer. Who knows how many people they have ripped off.


Edited by Bigcarlover (04/14/08 11:25 PM)

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#1450254 - 04/14/08 11:58 PM Re: Fuel Rail Pressure Regulator [Re: Bigcarlover]
watkd Offline
Over the Hill

Registered: 05/08/04
Posts: 4329
Loc: Tucson, AZ
Sometimes the service advisors will make an estimate based off of their experiences from repairing other vehicles. When I ask for an estimate it sounds like its a big deal to check the computer. Ask them to check the computer to make sure. No way its 600 dollars for a pressure regulator. The part is right at the top where the fuel rail is, it wouldnt take that long.
_________________________
1996 Grand Marquis GS
246K

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#1460505 - 04/27/08 12:59 PM Re: Fuel Rail Pressure Regulator [Re: watkd]
p71victoria Offline
n00b

Registered: 02/13/08
Posts: 25
Loc: CA
What are symptoms of a faulty fuel pressure regulator? My 2001 Crown Victoria will not start on the first try. If you turn the key enough for the fuel pump to come on and wait a little bit, it will start.
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2001 Crown Victoria P71

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#1461015 - 04/28/08 02:31 AM Re: Fuel Rail Pressure Regulator [Re: p71victoria]
watkd Offline
Over the Hill

Registered: 05/08/04
Posts: 4329
Loc: Tucson, AZ
What is the mileage on your vehicle, your fuel pump sounds worn.
_________________________
1996 Grand Marquis GS
246K

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#1461031 - 04/28/08 03:07 AM Re: Fuel Rail Pressure Regulator [Re: watkd]
p71victoria Offline
n00b

Registered: 02/13/08
Posts: 25
Loc: CA
 Originally Posted By: watkd
What is the mileage on your vehicle, your fuel pump sounds worn.


If you're talking to me, its 125,000. For a while, you would turn the key and it catches, then appears to die for a second, then catches again and runs just fine. Lately, you might have to press the accelerator pedal to keep it from dying and after a little bit, it will idle just fine. I checked the spark plugs, added dielectric grease, and changed the fuel filter a while back. This only happens overnight. Frequent startups are fine. If I cycle the key a couple times, it helps somewhat, or if it is warm out, it starts easier. It seems like a fuel issue to me...but not sure which component.
_________________________
2001 Crown Victoria P71

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#1461082 - 04/28/08 07:40 AM Re: Fuel Rail Pressure Regulator [Re: p71victoria]
Greggo Offline
Rookie

Registered: 03/02/07
Posts: 50
Loc: Huntsville, Texas
I had something similar happen and it was the IAC.
An easy and cheap replacement also.
_________________________
Greggo
2004 TxDPS CVPI
2004 TxDPS CVPI (Yes 2 of them)

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#1461219 - 04/28/08 11:54 AM Re: Fuel Rail Pressure Regulator [Re: Greggo]
p71victoria Offline
n00b

Registered: 02/13/08
Posts: 25
Loc: CA
 Originally Posted By: Greggo
I had something similar happen and it was the IAC.
An easy and cheap replacement also.


What were your vehicle's symptoms?
_________________________
2001 Crown Victoria P71

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#1461590 - 04/28/08 10:06 PM Re: Fuel Rail Pressure Regulator [Re: p71victoria]
Yvan Offline
Member

Registered: 01/14/07
Posts: 316
Loc: Ontario and/or Québec, Canada
Sounds a bit like the problems I had on the 99. I put in a new pump, and cleaned out the electrical connector at the pump three times. Finally the problem is gone and it starts perfectly in the morning without having to pulse the ignition key a few times.

BTW, the new pump sounds louder but smoother than the old one. The old one had an irreguler harshness to it. Maybe that was the sound of impending death. ;\)

I wonder if you have more than one problem with the car...? Like and IAC valve issue mixed in there? That was causing me to have to put my foot on the gas pedal to keep it from dying on the first start up of the day.

Others with more knowledge might be able to pick this apart better. ;\)
_________________________
-1999 Grand Marquis LS, RAS, 205 000 km. Hella FF50s to see by, remote start and alarm. Got a ScanGaugeII!
-1996 Grand Marquis LS, 245 000km poly upper/lower control arms.
-1994 F150 XL 4.9l manual, sold to a friend!
-1992 Lincoln Continental - gone to the wreckers at 240 000km.
-2001 F150 XL 4.6l that needs a bit of TLC.
-2007 FX2, my dad's Last Truck.

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