Recent Topics
Sometimes I hate my Corrado
by hotwheels
03/05/15 01:00 AM
Replacing CV boot, eBay surprise
by asand1
03/05/15 12:40 AM
Best bang for the buck oil filter?
by Gerbils
03/04/15 10:05 PM
New Galaxy S6 is eliminating
by Ed_T
03/04/15 09:07 PM
**ButTwoGetOne** G.E. LED Bulbs..Target
by Warstud
03/04/15 08:58 PM
Oil filter wrenches
by jk_636
03/04/15 08:48 PM
Federal tires
by Camprunner
03/04/15 08:40 PM
Are twenty cylinders enough?
by joel96
03/04/15 08:05 PM
Should you tell a customer what's wrong or just ho
by motor_oil_madman
03/04/15 07:45 PM
help on choosing an air compressor
by ram_man
03/04/15 07:12 PM
LED Bulb Question...
by Warstud
03/04/15 07:11 PM
Just saw the funniest thing on the freeway...
by slowdime
03/04/15 07:03 PM
Newest Members
tmfrahm, theblueox, 03Pathfinder, tigerh1752, cuttysark
53036 Registered Users
Who's Online
24 registered (bugman53, Clevy, Dyusik, garlicbreadman, 901Memphis, edhackett, 4 invisible), 626 Guests and 250 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
53036 Members
66 Forums
227552 Topics
3630356 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: 435
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
Pennzoil Platinum 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: 3140
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: 2622
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: 1595
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 - 27,000 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: 5304
Loc: FreelanceRoverRogerRabbit
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 VX 287k+ -- M1 AFE 0w-30 w/ Bosch D+3312 & aFe Pro Dry S

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: 3711
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.
_________________________
2001 Hyundai Elantra 2.0
1998 Chevy Malibu 2.4
1995 Pontiac Grand Am 3.1
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: 5304
Loc: FreelanceRoverRogerRabbit
Oh, yeah. That too! lol
_________________________
'92 Civic VX 287k+ -- M1 AFE 0w-30 w/ Bosch D+3312 & aFe Pro Dry S

Top