Fuel pump or reg?

Lethal5Oh · 06-30-2002, 03:52 PM

I know, ive asked this question before but i have new more clear info. (thanks for all of your patience with me) KOEO fuel pressure goes to 25 PSI and immediatley falls to 0PSI. A second try KOEO 25PSI, held for about 5 seconds then fell about 3 PSI, held, then fell to 0. KOER 30 psi, removed reg vacuum hose 40PSI. turned the car off and pressure went to 0 again. Would this be the pump or the regulator? I dont want to buy a new reg and then have to buy a pump or viceversa. Thanks again.

PKRWUD · 06-30-2002, 04:10 PM

You need either a pair of needle nose vise grips, or a fuel line clamp. Then find a spot in the supply fuel line where it is hose (steel braid is fine). Have someone turn the key on, count to 2, and clamp the line. Observe the gauge. If it holds, it is either the pump, or more likely a split in the hose inside the tank. If it doesn't hold, it's either the injectors leaking, or the regulator. Now do the test again, but clamp the return line. If it now holds, replace the regulator, if it bleeds down, replace the injectors.

Take care,
-Chris

Lethal5Oh · 06-30-2002, 07:06 PM

Do you know of a spot that the fuel line is just hose? Ive been under the car and all i see is that pastic hose thats covered by rubber or metal lines. I might just say screw buying an exhaust system for right now and buy both the pump and regulator. what do you think?

Lethal5Oh · 07-01-2002, 11:43 PM

PKRWUD??

PKRWUD · 07-01-2002, 11:50 PM

I have a tool that I made for just such a purpose. I took an old fuel filter, cut off the inlet and oulet tubes, and fitted them to a 2' length of rubber fuel injection hose. I remove the filter, and insert this in it's place, and then just crimp the hose. Because of this, I don't even bother looking for a location on the factory fuel line anymore.

Take care,
-Chris

Lethal5Oh · 07-03-2002, 10:16 AM

Yeah and i just threw my old fuel filter away acouple weeks ago to. Owell. I ordered a 110lph fuel pump (walbro) and an aeromotive AFPR. I figure ill just repalace them both and the problem should be fixed. If not i dont know what ill do. The stock fuel pump is whinning alittle louder than normal, and with past experience on other cars, im guessing its going bad. Thanks for you help. also where do you think i should set my new reg? Just set it at stock?

06-30-2002, 03:52 PM	#1
Lethal5Oh Registered Member Join Date: Jun 2002 Location: Portage Posts: 239	Fuel pump or reg? I know, ive asked this question before but i have new more clear info. (thanks for all of your patience with me) KOEO fuel pressure goes to 25 PSI and immediatley falls to 0PSI. A second try KOEO 25PSI, held for about 5 seconds then fell about 3 PSI, held, then fell to 0. KOER 30 psi, removed reg vacuum hose 40PSI. turned the car off and pressure went to 0 again. Would this be the pump or the regulator? I dont want to buy a new reg and then have to buy a pump or viceversa. Thanks again. __________________ '95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes

06-30-2002, 04:10 PM	#2
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You need either a pair of needle nose vise grips, or a fuel line clamp. Then find a spot in the supply fuel line where it is hose (steel braid is fine). Have someone turn the key on, count to 2, and clamp the line. Observe the gauge. If it holds, it is either the pump, or more likely a split in the hose inside the tank. If it doesn't hold, it's either the injectors leaking, or the regulator. Now do the test again, but clamp the return line. If it now holds, replace the regulator, if it bleeds down, replace the injectors. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-30-2002, 07:06 PM	#3
Lethal5Oh Registered Member Join Date: Jun 2002 Location: Portage Posts: 239	Do you know of a spot that the fuel line is just hose? Ive been under the car and all i see is that pastic hose thats covered by rubber or metal lines. I might just say screw buying an exhaust system for right now and buy both the pump and regulator. what do you think? __________________ '95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes

07-01-2002, 11:43 PM	#4
Lethal5Oh Registered Member Join Date: Jun 2002 Location: Portage Posts: 239	PKRWUD?? __________________ '95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes

07-01-2002, 11:50 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	I have a tool that I made for just such a purpose. I took an old fuel filter, cut off the inlet and oulet tubes, and fitted them to a 2' length of rubber fuel injection hose. I remove the filter, and insert this in it's place, and then just crimp the hose. Because of this, I don't even bother looking for a location on the factory fuel line anymore. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-03-2002, 10:16 AM	#6
Lethal5Oh Registered Member Join Date: Jun 2002 Location: Portage Posts: 239	Yeah and i just threw my old fuel filter away acouple weeks ago to. Owell. I ordered a 110lph fuel pump (walbro) and an aeromotive AFPR. I figure ill just repalace them both and the problem should be fixed. If not i dont know what ill do. The stock fuel pump is whinning alittle louder than normal, and with past experience on other cars, im guessing its going bad. Thanks for you help. also where do you think i should set my new reg? Just set it at stock? __________________ '95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes

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