Fuel problem!

jonosranger · 04-17-2010, 10:18 PM

ok this is on my 79 model lx with a 5.0. it has all fuel injection from like an 89.it has the v8 fuel lines from a 89. it has a trick flow external pump because of the 79 tank with no internal pump. pump is mounted on frame rail. ok problem is, when its cold the pump will prime and it will run untill it gets warm and then it quits getting fuel to pump. i have a little filter in between tank and pump to catch any debris out of tank. i thought maybe sender is stopped up so i took air hose and blew thru line into tank. still no prime. i am at a loss! here are some pix!

swammi · 04-18-2010, 06:31 AM

do you have a vent on the tank? if not u need one. you can also crack u gas cap open about a 1/4 turn and try it!

SlowJoe · 04-18-2010, 06:38 AM

Quote:

Originally Posted by swammi

do you have a vent on the tank? if not u need one. you can also crack u gas cap open about a 1/4 turn and try it!

done been through that with him. i have no clue.

jonosranger · 04-18-2010, 09:00 AM

Quote:

Originally Posted by swammi

do you have a vent on the tank? if not u need one. you can also crack u gas cap open about a 1/4 turn and try it!

i need to check the vent but i took the cap completely off and it still does it.

Quote:

Originally Posted by joecoupe

done been through that with him. i have no clue.

I thought bout what you said on the return bein stopped up. It could be possible cause old pump was rated at 40 psi and thats what it was at and new pump is rated for up to 80 psi and thats what it was at no matter where i turned the fpr. Im gonna take the line off later if i get a chance and try to blow thru it.

jonosranger · 04-18-2010, 09:38 PM

ok i fixed it. i believe it had a dirt dobber in the return line. i didnt notice it with the old pump cause it would only put out 40 psi and new pump will do 80 psi. anyway its fixed lol

QWKSNKE · 04-19-2010, 06:28 AM

ncontt · 04-19-2010, 12:31 PM

I had some do mine like that too....then I also had a kinked line, glad you got it straight

jonosranger · 04-19-2010, 03:01 PM

thanks guys it sucks though cause i ordered a 100 dollar fuel pump i didnt need.

ncontt · 04-21-2010, 03:19 PM

lol, hang on to it....you'll need it at some point....lol

jonosranger · 04-21-2010, 06:48 PM

Quote:

Originally Posted by ncontt

lol, hang on to it....you'll need it at some point....lol

i hear ya. i try to hang on to things like that. i feel better knowing that fuel pump is new. the other one is bout 15 years old lol

04-17-2010, 10:18 PM	#1
jonosranger Boost! Its wats 4 dinner Join Date: Mar 2009 Location: Bridgeport,AL Posts: 811	Fuel problem! ok this is on my 79 model lx with a 5.0. it has all fuel injection from like an 89.it has the v8 fuel lines from a 89. it has a trick flow external pump because of the 79 tank with no internal pump. pump is mounted on frame rail. ok problem is, when its cold the pump will prime and it will run untill it gets warm and then it quits getting fuel to pump. i have a little filter in between tank and pump to catch any debris out of tank. i thought maybe sender is stopped up so i took air hose and blew thru line into tank. still no prime. i am at a loss! here are some pix! __________________ 06 F150 crew cab 4x4 leveled on 35s 94 Lincoln Mark VIII, 3000 stall, shift kit, 3.73, hub swaped, 98 cobra wheels 06 yLincoln Zephyr- Wifeys DD

04-18-2010, 06:31 AM	#2
swammi magnaflow lover Join Date: Nov 2009 Location: pisgah al Posts: 150	do you have a vent on the tank? if not u need one. you can also crack u gas cap open about a 1/4 turn and try it! __________________ 97 f150 lariat excab tow rig 93 mustang gt under construction

04-18-2010, 09:38 PM	#5
jonosranger Boost! Its wats 4 dinner Join Date: Mar 2009 Location: Bridgeport,AL Posts: 811	ok i fixed it. i believe it had a dirt dobber in the return line. i didnt notice it with the old pump cause it would only put out 40 psi and new pump will do 80 psi. anyway its fixed lol __________________ 06 F150 crew cab 4x4 leveled on 35s 94 Lincoln Mark VIII, 3000 stall, shift kit, 3.73, hub swaped, 98 cobra wheels 06 yLincoln Zephyr- Wifeys DD

04-19-2010, 06:28 AM	#6
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	__________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

04-19-2010, 12:31 PM	#7
ncontt pro-jackstand racer Join Date: May 2005 Location: Milner, Ga Posts: 2,473	I had some do mine like that too....then I also had a kinked line, glad you got it straight __________________ And God created Neil Peart so that lightning would make sense to the world. ~~~~~~~~~~~~~~~~~~~~~~~~~~~

04-19-2010, 03:01 PM	#8
jonosranger Boost! Its wats 4 dinner Join Date: Mar 2009 Location: Bridgeport,AL Posts: 811	thanks guys it sucks though cause i ordered a 100 dollar fuel pump i didnt need. __________________ 06 F150 crew cab 4x4 leveled on 35s 94 Lincoln Mark VIII, 3000 stall, shift kit, 3.73, hub swaped, 98 cobra wheels 06 yLincoln Zephyr- Wifeys DD

04-21-2010, 03:19 PM	#9
ncontt pro-jackstand racer Join Date: May 2005 Location: Milner, Ga Posts: 2,473	lol, hang on to it....you'll need it at some point....lol __________________ And God created Neil Peart so that lightning would make sense to the world. ~~~~~~~~~~~~~~~~~~~~~~~~~~~