Fuel Delivery Issues

[Buffalo Phil]

Here's what I've been through:

3 fuel pumps
2 sending units
1 new gas tank

It seems the gas doesn't always like getting to my motor. I hit a bump, motor sputters. If I stop at a stop sign going downhil, the Jeep turns off. I have this funny feeling that my gas is sloshing around inside the tank and not getting to my fuel pickup.

I also replaced the IAC recently, so it idles fine when parked on completely level ground.

How does the fuel pickup inside the tank work? I know there is a pan inside the tank to prevent such things but what do I do if it still continues to happen?

[92xjlaredo]

my last fuel tank had been bashed so many times that the pan actually broke off the bottom and was sloshing around inside....however id say just keep more gas in it lol.

[Buffalo Phil]

That's sweet, this is a brand new tank and it does it when there is 3/4 of a tank in there, sometimes even with a full tank.

[hoggie101]

Are you gas lines from the cold war era still maybe they are clogged or pinched somewhere

[Buffalo Phil]

Are you gas lines from the cold war era still maybe they are clogged or pinched somewhere

But here is my issue with that, it would then do it all the time under normal driving conditions, why does my jeep run well enough on level ground but stall out when I come to a stop going downhill or the vehicle gets jolted?

Yeah, my cold war gas lines could be corroded...should I just get a fuel cell?

[ct67_72]

I cant see that being an issue with that much fuel in it. What you can do is run a fuel pressure gauge outside and drive it, when you come to a stop see if you have a drop in fuel pressure.
With all of the other parts replaced was the actual pickup tube in the tank replaced?

[Buffalo Phil]

With all of the other parts replaced was the actual pickup tube in the tank replaced?

That I don't actually know. I didn't install the new tank and sending unit / fuel pump.

[ct67_72]

I would drive it with a fuel pressure gauge and make sure that it is actually a fuel delivery issue.

[Buffalo Phil]

For theory, what would be the issue if I have bad fuel pressure or the fact that it would fluctuate and what would be the issue if my fuel pressure remained the same even when the vehicle sputters and or turns off at a stop sign?

[ct67_72]

If it maintains fuel pressure than its not a delivery issue, and you can move away from that system. If it does drop or go erratic coming to a stop at least you know for a fact that it is a fuel issue. At that point you have some options on how to test farther, but you know what your testing for.
One more question, does i only happen when coming to a complete stop? Does braking force affect how badly this happens?
I would ask if hard acceleration also affected it but I think my definition of that applies to your Jeep...

[ct67_72]

Oh also can you 2 foot it and keep it running? Have you tried to come to a stop in neutral to see if it still stalled?

[Buffalo Phil]

Oh also can you 2 foot it and keep it running? Have you tried to come to a stop in neutral to see if it still stalled?

Yes, if the motor is revving above the standard idle then it won't stall out, it tries to and it may sputter sometimes but I power past the misfires until it returns to normal. I have tried two footing it, but before I replaced the IAC, I had to rev the motor up with the brakes on while in neutral and then put it in drive with my foot on the brake and slowly ease off the brakes in order for it not to die.

The IAC was replaced and the throttle body was cleaned and now that happens less. There is still the issue of the vehicle stopping and retuning to idle when on and incline or decline. Stopping the vehicle abruptly will cause sputtering, hitting a pothole and a series of hard bumps in the road will cause the vehicle to drastically lose power and the motor to sputter.

Just driving to Bridgeport today it happened 3 times in a row. Downhill stop sign and the vehicle just turned off in the road. I really think it's the fuel pickup because I can't think of anything else it could be.

[BRock89GW]

How old is your battery?

[hoggie101]

Brand new he just picked up a battery 230cca at sear today shot should be mint. Also he he a fucking massive nigger you asshat you cut open my orange goof contner! Who does that!?!? All you had to do was just un screw the top!

[Buffalo Phil]

Brand new he just picked up a battery 230cca at sear today shot should be mint. Also he he a fucking massive nigger you asshat you cut open my orange goof contner! Who does that!?!? All you had to do was just un screw the top!

How old is your battery?

Maybe a year or so old.