Q-jet Fuel Pouring out

JP Schuster · 03-26-2015, 01:54 PM

I am new to these Qjet carbs and I put one on the car and as soon as i turned the fuel pump on, fuel came running out of the vent tube and out of the part that plunges in the front bowl (i think that what it does) when you open up the throttle. Sorry to sound like a rookie but is something stuck or broken?

Thanks,

JP

Dave Ribeiro · 03-26-2015, 02:14 PM

Sounds like you have something sticking like a float or a needle /seat has a piece of dirt or silicone/tape stuck.. Carb needs to be taken apart & checked for dirt in needle/seat or hole/crack in float... When you take everything apart, lay on a towel & put back the same order ? Check main fuel inlet on front or side of Q-jets for silicone or dirt/tape in their ??? Good luck & take your time they are pretty simple to work on !!!!

SSDiv6 · 03-26-2015, 02:35 PM

Also check your fuel pressure; QJ's do not like excessive fuel pressure.

Mike Pearson · 03-26-2015, 03:14 PM

If the carb has been sitting for a while the needle will dry out especially of you are running racing fuel. Let the carb sit for a half hour or so with fuel in it and try again. Cut the fuel pressure back to 6 lbs and try. My car runs good at 6 lbs.

FireSale · 03-27-2015, 10:16 AM

And be very careful with these problems. This is what my Holley was doing when a spark started an engine fire. Toasted my wiring but other than that, alls OK.

Dale

ss3011 · 03-31-2015, 06:17 PM

Please share what you found wrong. Thanks

03-26-2015, 01:54 PM	#1
JP Schuster Junior Member Join Date: Mar 2012 Posts: 54 Likes: 0 Liked 0 Times in 0 Posts	Q-jet Fuel Pouring out I am new to these Qjet carbs and I put one on the car and as soon as i turned the fuel pump on, fuel came running out of the vent tube and out of the part that plunges in the front bowl (i think that what it does) when you open up the throttle. Sorry to sound like a rookie but is something stuck or broken? Thanks, JP

03-26-2015, 02:14 PM	#2
Dave Ribeiro VIP Member Join Date: Sep 2002 Location: Williamsburg, Va.---USA Posts: 1,827 Likes: 1,612 Liked 56 Times in 27 Posts	Re: Q-jet Fuel Pouring out Sounds like you have something sticking like a float or a needle /seat has a piece of dirt or silicone/tape stuck.. Carb needs to be taken apart & checked for dirt in needle/seat or hole/crack in float... When you take everything apart, lay on a towel & put back the same order ? Check main fuel inlet on front or side of Q-jets for silicone or dirt/tape in their ??? Good luck & take your time they are pretty simple to work on !!!! __________________ Dave Ribeiro 1033 STK

03-26-2015, 02:35 PM	#3
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,045 Likes: 712 Liked 1,603 Times in 583 Posts	Re: Q-jet Fuel Pouring out Also check your fuel pressure; QJ's do not like excessive fuel pressure.

03-26-2015, 03:14 PM	#4
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,455 Likes: 617 Liked 1,944 Times in 585 Posts	Re: Q-jet Fuel Pouring out If the carb has been sitting for a while the needle will dry out especially of you are running racing fuel. Let the carb sit for a half hour or so with fuel in it and try again. Cut the fuel pressure back to 6 lbs and try. My car runs good at 6 lbs. __________________ Mike Pearson 2485 SS

03-27-2015, 10:16 AM	#5
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 237 Times in 126 Posts	Re: Q-jet Fuel Pouring out And be very careful with these problems. This is what my Holley was doing when a spark started an engine fire. Toasted my wiring but other than that, alls OK. Dale

03-31-2015, 06:17 PM	#6
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Q-jet Fuel Pouring out Please share what you found wrong. Thanks