hello i have a 89yj with a 6cylinder, i jsut changed the gas tank because the previous one had a hole in it. the truck will not run if i put a fuel filter on it. it runs perfect without it though. i have tryed different types of filters and all of them are clear of garbage. all the lines are clear. i am thinking that there isnt enough pressure so the fuel filter is restricting the gas soo i changed the pump and the same thing is still happening. any ideas would be greatly appreciated thank you.
yes i know its not getting fuel, i am just unsure as to why. i blew out the lines wit the cap off and ended up with a lot of gas on my driveway, the fuel pressure just drops off randomly and i cant figure out why. i dont think i am that unlucky that i got 3 defective fuel pumps. and this only occured since i changed my fuel tank
What about electrical connections at the pump?
You said it yourself, "Ran good till I replaced the tank"
So, follow the steps you did when you replaced the tank, only in reverse. Start looking at everything closely. Could even be a bad ground.
the pump is a mechainical one mounted to the motor . only electrical thing on the tank is the for the gas gauge and that works perfect. i was thinking it could be a kink or twisst in the hose also, my only prob wit that is that it would most likely either be completely clogged or open not just open and close as it feels
Could be the sock filter in the tank. Did you check that? Try blowing back into the fuel line with the cap off the tank. Or remove the suction line at the pump and see if you have good availability to the pump. Should be good flow the size of the line and fill a quart bottle in no time.
i changed the gas tank and the sock that was in it was clogged, i dropped the tank and put the one in from the old tank, it isnt a sock its a plastic mesh type thing, as i said before when i blow into the tank it squirts gas out the back when i blow through it, it fills up a gas tank quickly. ive changed the pump multiple times, i just dont know
I don't understand how you can have gas all over the place when you back blow into the fuel line to check for a blockage? If any gas leaks out then find that spot, that is leaking and that is your problem.
That would do it, I was thinking more along the lines of using your mouth. Good thing you had the cap off or you would have the only Jeep around with a 25 gal tank. But seriously a light pressure and check for any gas leaking. Suction leaks can be hard to find.
i remember in the past i had my steering crushed one of my hoses and i used a pair of plyers to uncrush/open it up. i am sure that it recrushed and i am going to replace that tommorow and hope for the best.
i changed all of the rubber hoses front to back. everything is clear i can blow through it with my mouth no prob. it is still doing it i am completely confused. i tryed driving with the cap off and everything and it still does the same thing. i am gonna bypass the mechanical pump with an electric pump and if that doesnt work i might actually let a mechanic touch it
ive blown them out multiple times and ive tryed many diff kinds of pumps. i would think the air pockets would get them selves out, is it possible it could be a carb problem, the carb clogs and then doesnt let air go through and then it appears like the gas runs out
i have left the truck idleing for about 20 minutes so far, sometimes when i watch the filter bowl start to run out of gas i shake a hose and squeze it and the filter fills back up again. i really am confused on what is occuring
There are 2 different types of mechanical fuel pumps for an 89 4.2; one has the outlet to the front and one to the rear based upon whether your vin has an M or T in it. However, I still don't think that would cause your problem but it's possible. If everything was fine prior to the tank being replaced I don't think you can rule out that there is a problem with the connection/mesh sock inside of the tank. Since you replaced everything it still seems that the fuel pump can't pull enough for an extended period as a result of some type of restriction which could still be in the tank.