This is the reason why everyone is having fuel cut with the Walbro pumps....Eventhough the quote is talkinga bout LS1 cars, it also applies to 3rd gen J-bodies.

"The 1999 & up LS1 F-body cars have a pump that is inside a plastic fill-bucket. The fill-bucket is equipped with two inlets on the bottom. The equalization checkvalve is used to fill the bucket when the level of fuel in the tank is greater than in the bucket. The equalization checkvalve does not allow fuel to exit the bucket. The venturi system's inlet is a combination checkvalve and powered suction system. The factory pump supplies pressurized fuel via a small tube which feeds a calibrated jet inside the venturi system. This jet of fuel shoots across the base of the checkvalve inlet thereby creating a suction effect which draws more fuel from the bottom of the tank through the filter sock. This venturi system keeps the bucket full all the time even when the fuel tank is almost empty. A full bucket keeps the pump immersed in fuel regardless of the tank level so that when the tank is low on gas and you are doing some hard cornering or acceleration the pump does not run dry and start aerating (air bubbles) the fuel. This happens as the fuel sloshes from side to side in the tank leaving the center low on fuel. This can cause detonation and possible engine damage. The 99+ F-LS1 cars with plastic tanks have no baffling in them so the bucket is very important. The bucket also allows the car to operate with lower fuel levels in the tank due to its scavenging effect. The fill-bucket improves motor crank-to-run time as the priming time is reduced under most conditions. The return line feeds the pressure regulator on the fuel module which diverts fuel back into the bucket so that the unused fuel also helps keep it full at all times. Keeping the pump constantly immersed in gas within the bucket can extend the pump's life by not allowing it to be exposed to open air. Open air within the tank contains moisture and in time will cause the pump to rust / seize up especially if left to sit for long periods of time without the tank topped-up (i.e. winter storage)."

The Walbro pumps are not made for cars using the venturi system.




275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!

Oh yea, Kace......The stock intank fuel pump with a inline fuel pump using a FMU should be plenty for you. We know that the stock fuel pump with a powerful inline pump will support atleast 400hp.




275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!

thanks adler
do you know if it would be the injectors cause a buddy of mine has a 2002 2200 and he was running 10psi and had know problems i was also woundering if his injectors would work with my computer

What do you mean when you said that you cannot get over 7psi? You cant get over 7psi without running lean?




275hp & 306tq - 1999 2.2 ohv
13.2 @ 108 mph
-1996 2.4 liter + Turbo + Built motor + Torco + More boost = Lots o' Power
-2000 Mustang GT + 2004 Cobra motor, Whipple 2.3 supercharger,
built rear-end,Dodge Viper spec T56 6 speed, bolt-ons = wheelies at the track!!!!!

when it gets to about 6-7psi it just boggs for 1sec then build boost to 6-7psi and boggs again and will keep doing that .

yea my brother is having the same problem with his 1995 2.2L. hes using a stock fuel pump because he is broke. Not that a new one will help the fuel cut since hes using stock fuel injectors but, you can't use any other injectors in the 95-97 2.2L engines because they are side feed. i see in your reg that you have a 99 so you should have a 2200 motor. i hear that you can actually use larger injectors in the 2200's so you should be ok. but these 95-97 2.2L motors seem to have very few fuel options...

if you have a 95-97 2.2, simply swap the head/TB from a 98+ 2200 and that solves your 95-97 injector problem




the reason for good sticky tires!

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