Fuel pressure won't drop after blower install!

exgmguy · 05-29-2002, 04:09 PM

If anyone can help with this, I'd greatly appreciate it.

I have tried 3 different regulators, including a stock one, and it won't go any lower. With 30 pound injectors on a 302, 45 psi at idle is fouling my plugs and making it run like crap.

I have a 255 lph intank, as well as a T-rex. I bypassed the T-rex, to no avail. I also checked the return line for clogs. Nothing.

I noticed a few othres on the Corral have the same problem an nobody seems to have an answer. Even the blower manufacturers!

avbcon12 · 05-29-2002, 04:14 PM

even with a stock regualtor you cant get it below 45???

P.S. what happened to your purple hatch?

take care,
adam

LX5liter · 05-29-2002, 05:57 PM

Are you running an FMU?. If its screwed up it may be the cause of your problem.

exgmguy · 05-29-2002, 07:13 PM

The purple hatch is sitting in my garage. Now i've got the light pos fiberglass one.

I do now have the stock regulator on and no difference. Then I took out the FMU. Fuel pressure is now at 38 psi with vacuum, 42 without. I should now try putting on one of my adjustable regulators and see if that makes a difference.

avbcon12 · 05-29-2002, 07:56 PM

its gotta be the FMU. its reading where it should with the stock regulator.

i meant the car. is that yours in the picture? i thought you were running a purple hatchback with draglites....

take care,
adam

exgmguy · 05-30-2002, 05:37 PM

Oh,

It is still the same car. I just had it painted.

05-29-2002, 04:09 PM	#1
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	Fuel pressure won't drop after blower install! If anyone can help with this, I'd greatly appreciate it. I have tried 3 different regulators, including a stock one, and it won't go any lower. With 30 pound injectors on a 302, 45 psi at idle is fouling my plugs and making it run like crap. I have a 255 lph intank, as well as a T-rex. I bypassed the T-rex, to no avail. I also checked the return line for clogs. Nothing. I noticed a few othres on the Corral have the same problem an nobody seems to have an answer. Even the blower manufacturers! __________________ 1988 Mustang GT stock bottom 302, C4 10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN 1989 Mustang notchback Warmed up 306 with a Procharger.

05-29-2002, 04:14 PM	#2
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	even with a stock regualtor you cant get it below 45??? P.S. what happened to your purple hatch? take care, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-29-2002, 05:57 PM	#3
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	Are you running an FMU?. If its screwed up it may be the cause of your problem. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

05-29-2002, 07:13 PM	#4
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	The purple hatch is sitting in my garage. Now i've got the light pos fiberglass one. I do now have the stock regulator on and no difference. Then I took out the FMU. Fuel pressure is now at 38 psi with vacuum, 42 without. I should now try putting on one of my adjustable regulators and see if that makes a difference. __________________ 1988 Mustang GT stock bottom 302, C4 10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN 1989 Mustang notchback Warmed up 306 with a Procharger.

05-29-2002, 07:56 PM	#5
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	its gotta be the FMU. its reading where it should with the stock regulator. i meant the car. is that yours in the picture? i thought you were running a purple hatchback with draglites.... take care, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-30-2002, 05:37 PM	#6
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	Oh, It is still the same car. I just had it painted.

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