96 GTX pressurized fuel system flooding engine?

[vwjohn]

I'm still scratching my head trying to figure out why my GTX keeps flooding and fouling plugs after a short period of idleing and is so difficult to restart after it has been running. Today I decided to pull the carbs off again and see if I could have done something wrong when I rebuilt them. It is strange however that both carbs are doing the same thing. This leads me to believe it is something external to the carbs causing it. Well when I was removing the carbs and pulled off the fuel return line it spewed gas and air for a long time. I thought this was rather odd since the fuel tank is vented isn't it? We ll that got me thinking about the last time I put gas in it and removed the fuel cap. Instead of the slight pressure release when the cap was removed it blew the cap off. Then I got to thinking about how it acts. After I fuel the doo it starts and idles fine but after riding it for a short time the idle starts slowing down and if you check the plugs they are soaking wet with gas. It always seems to run well from 1/4-full throttle although it has been using a lot of gas. Back to my point, I called SBT and asked about the tank pressurizing and was told by the always helpful folks that it is not normal to have that much pressure and the check valve in the vent is only 5 PSI. I located the check valve under the rub rail and disconnected it. I tried to blow through it and could not do it. My wife always tells me I am full of hot air so I know I can produce more than 5 PSI. I rinsed the check in gas banged it around a little and what do you know...no it opens like it should. I did notice when I was rinsing it that some gooey looking oil came out of it. I put it back in and blew into the return line now I can hear the pressure bleeding off. I can't say for sure that this is my problem since I don't have the base gaskets for the carbs so I can reinstall them and try it. Hopefully my stealer will have them in stock. Has anybody ever heard of this problem or am I blowing up the wrong tree again? Sure sounds like it makes sense but at this point of frustration I am contimplating calling Art Bell for some alien insight!!! Would the pressure in the fuel tank cause the carbs to load up the cylinders.....sure seems like it would?

[1fastski.com]

Re: 96 GTX pressurized fuel system flooding engine?

its possable thats your problem , but unless your needle and seats are leanking you should not foul plugs . if the carbs are off you should take the time to do a pop off test on them .

[vwjohn]

Re: 96 GTX pressurized fuel system flooding engine?

I ordered a pop off gauge and am still waiting for it, but thats the plan.

[Bill O'Neal1]

Re: 96 GTX pressurized fuel system flooding engine?

Replace the check valve (about $4) and if it still floods the motor, replace the needles and seats.

I believe that fuel check valve is only susposed to hold about 1.5 lbs of pressure.