carb trouble

tayzoid1 · 01-09-2009, 10:36 PM

ok having carb trouble again i have tracked it down to the rear needle valve i get on the car till redline the the secondaries start pouring gas i take off the rear bowl spray with carb cleaner put it back to gether runs great allday long until i get on the throttle good then it starts pouring again and the car dies, the needle looks fine and the needle seat looks fine what should i do?

SlowJoe · 01-10-2009, 05:45 AM

Evan if it looks good i would put a new one in it.

EHardy1971 · 01-10-2009, 07:55 AM

Quote:

Originally Posted by joecoupe

Evan if it looks good i would put a new one in it.

It could have a small burr on it somewhere that you can't see.

tayzoid1 · 01-10-2009, 01:29 PM

the only thing that i have against putting a new one in is the amount of fuel coming out of the vent tube it is literally shooting out and i have turned the fuel press way down from what it was i cant imagine a small bur causing this much fuel to leak the only other thing i can think of is the float aint floatin but then it would leak all the time not just when i get the motor above 4k

SlowJoe · 01-10-2009, 01:37 PM

Quote:

Originally Posted by tayzoid1

the only thing that i have against putting a new one in is the amount of fuel coming out of the vent tube it is literally shooting out and i have turned the fuel press way down from what it was i cant imagine a small bur causing this much fuel to leak the only other thing i can think of is the float aint floatin but then it would leak all the time not just when i get the motor above 4k

a sticking needle will spray fuel out bad!

waypastcrazy · 01-10-2009, 02:00 PM

Because that's when the secondaries are coming in around 4k its needle sticking or float hanging onsomething

waypastcrazy · 01-10-2009, 03:08 PM

Once they open and float drops to open seat to let fuel back in and level comes back up the bur can keep the seat from shuttn fuel off and the bowl will overfill at what ever the fuel pressure is. What carb is this?

tayzoid1 · 01-10-2009, 05:18 PM

it is a holly i havent looked close enough to know what model it is and no orileys carries the needle valve nor bolts that will fit the bowls cause i broke one today at oreileys parkinglot

waypastcrazy · 01-10-2009, 05:27 PM

Its prob a 650 vacumm secondary with side hung floats.or is it center hung either way I am surprised they didn't have a needle seat. Maybe advance auto or autozone?will prob half to find a bolt from a used carb. I have what ya need but I am in odessa tx right now. Good luck

waypastcrazy · 01-10-2009, 05:36 PM

Make sure u use holley brand parts all others will not last long especially needle seats.inferior qaulity.if oreilys didn't have it then its prob side hung needle and seat which u can only get in a kit most of the time. Lol I have tons of them. I am just not at home right now. Post us a pic. So we can help you better.

01-09-2009, 10:36 PM	#1
tayzoid1 5.slo stanger Join Date: Jan 2007 Location: oxford alabama Posts: 735	carb trouble ok having carb trouble again i have tracked it down to the rear needle valve i get on the car till redline the the secondaries start pouring gas i take off the rear bowl spray with carb cleaner put it back to gether runs great allday long until i get on the throttle good then it starts pouring again and the car dies, the needle looks fine and the needle seat looks fine what should i do? __________________ no mustangs anymore but i do have a 1jz swapped 83 supra

01-10-2009, 05:45 AM	#2
SlowJoe Mind Blowing Join Date: Jun 2006 Location: Dawsonville Ga Posts: 3,913	Evan if it looks good i would put a new one in it. __________________ Slow Joe Racing 2008 dodge ram 5.7 HEMI 1993 lx with a 289 and a 3 speed on the floor WTB 1955 t-bird project

01-10-2009, 01:29 PM	#4
tayzoid1 5.slo stanger Join Date: Jan 2007 Location: oxford alabama Posts: 735	the only thing that i have against putting a new one in is the amount of fuel coming out of the vent tube it is literally shooting out and i have turned the fuel press way down from what it was i cant imagine a small bur causing this much fuel to leak the only other thing i can think of is the float aint floatin but then it would leak all the time not just when i get the motor above 4k __________________ no mustangs anymore but i do have a 1jz swapped 83 supra

01-10-2009, 02:00 PM	#6
waypastcrazy ADDICTED TO SMALL BLOCKS Join Date: Jan 2007 Location: lookout mt Posts: 1,757	Because that's when the secondaries are coming in around 4k its needle sticking or float hanging onsomething __________________ http://alabamaopencarry.com/forum/index.php One of StreetStangs class clowns! Status:slow as hell! NORTH EAST ALABAMA STANGS

01-10-2009, 03:08 PM	#7
waypastcrazy ADDICTED TO SMALL BLOCKS Join Date: Jan 2007 Location: lookout mt Posts: 1,757	Once they open and float drops to open seat to let fuel back in and level comes back up the bur can keep the seat from shuttn fuel off and the bowl will overfill at what ever the fuel pressure is. What carb is this? __________________ http://alabamaopencarry.com/forum/index.php One of StreetStangs class clowns! Status:slow as hell! NORTH EAST ALABAMA STANGS

01-10-2009, 05:18 PM	#8
tayzoid1 5.slo stanger Join Date: Jan 2007 Location: oxford alabama Posts: 735	it is a holly i havent looked close enough to know what model it is and no orileys carries the needle valve nor bolts that will fit the bowls cause i broke one today at oreileys parkinglot __________________ no mustangs anymore but i do have a 1jz swapped 83 supra

01-10-2009, 05:27 PM	#9
waypastcrazy ADDICTED TO SMALL BLOCKS Join Date: Jan 2007 Location: lookout mt Posts: 1,757	Its prob a 650 vacumm secondary with side hung floats.or is it center hung either way I am surprised they didn't have a needle seat. Maybe advance auto or autozone?will prob half to find a bolt from a used carb. I have what ya need but I am in odessa tx right now. Good luck __________________ http://alabamaopencarry.com/forum/index.php One of StreetStangs class clowns! Status:slow as hell! NORTH EAST ALABAMA STANGS

01-10-2009, 05:36 PM	#10
waypastcrazy ADDICTED TO SMALL BLOCKS Join Date: Jan 2007 Location: lookout mt Posts: 1,757	Make sure u use holley brand parts all others will not last long especially needle seats.inferior qaulity.if oreilys didn't have it then its prob side hung needle and seat which u can only get in a kit most of the time. Lol I have tons of them. I am just not at home right now. Post us a pic. So we can help you better. __________________ http://alabamaopencarry.com/forum/index.php One of StreetStangs class clowns! Status:slow as hell! NORTH EAST ALABAMA STANGS