Bad fuel pressure regulator signs...

larrydog25 · 01-12-2008, 07:32 AM

I have noticed that everynow and then my explorer has a episode of hard starting. It seems like a cylinder might be loading up and it takes a bit to get it cleared out. Once the motor is running it's a smooth 800 rpm's with no missing what's so ever. I have replaced all plugs and wires. I doubt that it would be a fuel pump due to it's only when starting. Has anybody replaced the FPR? If so what kind of symptoms could I expect with one going bad?

96eb96 · 01-12-2008, 08:29 AM

Quote:

Originally Posted by larrydog25

I have noticed that everynow and then my explorer has a episode of hard starting. It seems like a cylinder might be loading up and it takes a bit to get it cleared out. Once the motor is running it's a smooth 800 rpm's with no missing what's so ever. I have replaced all plugs and wires. I doubt that it would be a fuel pump due to it's only when starting. Has anybody replaced the FPR? If so what kind of symptoms could I expect with one going bad?

Did you monitor fuel pressures? Hard starting as a first guess could be the Idle air control valve.

larrydog25 · 01-12-2008, 09:00 AM

Haven't monitored the pressures but I replaced the IACV this past summer. Hope it hasn't died already.

*frickea86* · 01-12-2008, 01:49 PM

They normally don't go that fast. Check all your vacuum lines, I'm not sure how your exact fuel system is run but i know on mine there are two vacuum lines that run to my fuel pressure regulator, if those are borken or leaking then that could be a problem.

If thats all fine, id then try and clean your IAC, I try and clean mine monthly.

Also, don't throw out that it could be a your PFE sensor for your EGR system. If its bad, it will load the cylinders up full of EGR gas and cause a rough idle.

**Turdle** · 01-12-2008, 01:53 PM

Sometimes the FPR diaphrgm will leak fuel into the vacuum line--check the line for a fuel smell, raw fuel.

SLOW RIDER · 11-05-2011, 12:51 PM

i have this problem raw fuel sprays from my vacuum line ,do i need to replace the fpr

swetrid · 11-05-2011, 01:01 PM

Yes

SLOW RIDER · 11-05-2011, 03:06 PM

thanks a lot ,so much gas coming out i figured it was a fuel line,
the connector kept popin off the hose i was going to put a clamp
on it lol, thank god 4 this site

01-12-2008, 07:32 AM	#1
larrydog25 Wannabe Elite Explorer Newark, Ohio 1996 Explorer Eddie Bauer Join Date: Aug 2006 Posts: 20 Vehicle Specs (Original Poster)	Bad fuel pressure regulator signs... I have noticed that everynow and then my explorer has a episode of hard starting. It seems like a cylinder might be loading up and it takes a bit to get it cleared out. Once the motor is running it's a smooth 800 rpm's with no missing what's so ever. I have replaced all plugs and wires. I doubt that it would be a fuel pump due to it's only when starting. Has anybody replaced the FPR? If so what kind of symptoms could I expect with one going bad?

01-12-2008, 01:49 PM	#4
frickea86 Rust? You mean character! Pittsburgh, PA '97 XLT SOHC Join Date: Jun 2003 Posts: 1,440 Vehicle Specs	They normally don't go that fast. Check all your vacuum lines, I'm not sure how your exact fuel system is run but i know on mine there are two vacuum lines that run to my fuel pressure regulator, if those are borken or leaking then that could be a problem. If thats all fine, id then try and clean your IAC, I try and clean mine monthly. Also, don't throw out that it could be a your PFE sensor for your EGR system. If its bad, it will load the cylinders up full of EGR gas and cause a rough idle. __________________ Adam 4.0 SOHC Modified w/ Magnaflow Exhaust... '10 Edge Sport

01-12-2008, 01:53 PM	#5
Turdle Old and in the way Humboldt, Kansas 2000 Mounty Join Date: Jun 2003 Posts: 23,745 Vehicle Specs	Sometimes the FPR diaphrgm will leak fuel into the vacuum line--check the line for a fuel smell, raw fuel. __________________ Jon 2000 Mountaineer Turdle-gone Vitamin D Wagon Sold also

11-05-2011, 01:01 PM	#7
swetrid Wannabe Elite Explorer Reading Pa 2001 Eddie Bauer Join Date: Sep 2010 Posts: 1,883 Vehicle Specs	Yes __________________ Resident Ford Tech for the last 17 years, 2001 Eddie Bauer 5.0L, Cherry Bomb Cat back, 2010 Ecoboost Flex

01-12-2008, 09:00 AM	#3
larrydog25 Wannabe Elite Explorer Newark, Ohio 1996 Explorer Eddie Bauer Join Date: Aug 2006 Posts: 20 Vehicle Specs (Original Poster)	Haven't monitored the pressures but I replaced the IACV this past summer. Hope it hasn't died already.

11-05-2011, 12:51 PM	#6
SLOW RIDER Wannabe Elite Explorer 1991 FORD EXPLORER XLT Join Date: Oct 2011 Posts: 33 Vehicle Specs	i have this problem raw fuel sprays from my vacuum line ,do i need to replace the fpr

11-05-2011, 03:06 PM	#8
SLOW RIDER Wannabe Elite Explorer 1991 FORD EXPLORER XLT Join Date: Oct 2011 Posts: 33 Vehicle Specs	thanks a lot ,so much gas coming out i figured it was a fuel line, the connector kept popin off the hose i was going to put a clamp on it lol, thank god 4 this site