Recent Topics
OK XJ Owners... Weigh In
by Globalksp
12/05/16 10:52 PM
2 easy to get greases for home use: name them...
by NattyBoh
12/05/16 09:09 PM
2000 Toyota Corolla | Misfire codes, Tune Up Needs
by Globalksp
12/05/16 09:08 PM
Experience with Total Wireless (div. of TracFone)
by mrsilv04
12/05/16 09:07 PM
A message to hockey fans (cbc)
by simple_gifts
12/05/16 08:44 PM
First auto accident this evening
by car51
12/05/16 08:33 PM
Apparently Canadians can't even into first snow.
by Nick R
12/05/16 08:22 PM
Arisaka pics, what type do i have?
by spasm3
12/05/16 08:04 PM
How much oil to put in 08 Honda Element?
by Garyd
12/05/16 07:53 PM
AAP December Flyer Oil and Other Deals
by THafeez
12/05/16 07:39 PM
Please school me on GM's Atlas? I 6
by andyd
12/05/16 07:36 PM
2004 Malibu Maxx 160K head pic
by Zaedock
12/05/16 06:53 PM
Newest Members
WhizkidTN, splattttttt, TwoHeartedCider, G8GTWhite1, 675luke
59792 Registered Users
Who's Online
54 registered (69GTX, ammolab, 4ever4d, alphadog, 4WD, B320i, 2 invisible), 1292 Guests and 20 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
59792 Members
66 Forums
257924 Topics
4243048 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#2725617 - 08/26/12 12:10 PM Fuel pressure regulator, if bad, what symptoms?
wolf_06 Offline


Registered: 06/11/12
Posts: 462
Loc: Atlantic, Canada
I wonder if fuel pressure regulator can have the same symtpoms as a bad fuel pump. And where is the fuel regulator location?
_________________________
2011 Chevy Cruze 1.8L 6AT
AC Delco Dexos 5w30 - OEM filter

Top
#2725662 - 08/26/12 01:27 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: wolf_06]
Warstud Offline


Registered: 09/02/05
Posts: 4127
Loc: MIchigan
Hard starting...stalling and the smell of raw gas are symptoms of a bad FPR. May be along the fuel rail.

Top
#2725779 - 08/26/12 04:40 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: wolf_06]
TFB1 Offline


Registered: 09/03/10
Posts: 3496
Loc: VA
Most systems in approx the last 10 years don't have a fuel pressure regulator but instead have a fuel pressure sensor... These systems regulate pressure by varying the voltage to the pump, vs having a mechanical regulator and constantly running the pump at battery voltage... Plus is there is no fuel return line to the tank and pump supposedly lasts longer as it's only pumping what's necessary, instead of constantly circulating the fuel...

Top
#2725804 - 08/26/12 05:03 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: TFB1]
Tegger Offline


Registered: 03/20/06
Posts: 2117
Loc: Canada
Originally Posted By: TFB1
Most systems in approx the last 10 years don't have a fuel pressure regulator but instead have a fuel pressure sensor... These systems regulate pressure by varying the voltage to the pump, vs having a mechanical regulator and constantly running the pump at battery voltage... Plus is there is no fuel return line to the tank and pump supposedly lasts longer as it's only pumping what's necessary, instead of constantly circulating the fuel...

My understanding is that returnless systems are an answer to recent EVAP regulations: Returnless systems lack a return line, which eliminates a line and lot of connections, all of which are potential sources of fuel/vapor leaks.

As for the OP's question, I'd expect that most fuel-pressure problems would be very likely to be flagged by the OBD-II system before any symptoms would be felt. I'd be expecting an illuminated MIL with a P01xx DTC.

_________________________
2013 Toyota RAV4 - 63,000 miles - Toyota 0W-20, Toyota filter

Top
#2726062 - 08/26/12 09:21 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: wolf_06]
ltslimjim Offline


Registered: 08/06/10
Posts: 5505
Loc: WatUpDoc
Easy check on vehicles with external FPR mounted to the fuel rail is to remove the vacuum line that is used to work the diaphragm open. If the fuel pressure does not raise once the vacuum line is removed, the pressure regulator is bad.
_________________________
92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup

Top
#2726226 - 08/27/12 06:45 AM Re: Fuel pressure regulator, if bad, what symptoms? [Re: ltslimjim]
The_Eric Offline


Registered: 03/31/10
Posts: 4859
Loc: Iowa
Originally Posted By: ltslimjim
Easy check on vehicles with external FPR mounted to the fuel rail is to remove the vacuum line that is used to work the diaphragm open. If the fuel pressure does not raise once the vacuum line is removed, the pressure regulator is bad.


Or if there's raw fuel in the vacuum line, it's bad.
_________________________
2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M

Top
#2726898 - 08/27/12 06:25 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: wolf_06]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
Right, Eric. It's the first thing to check.

Top
#2728048 - 08/28/12 06:40 PM Re: Fuel pressure regulator, if bad, what symptoms? [Re: wolf_06]
ltslimjim Offline


Registered: 08/06/10
Posts: 5505
Loc: WatUpDoc
Oh, yeah. That too! lol
_________________________
92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup

Top