help with '96 jeep please

bspitt

bspitt

Cajun in da Carolinas
Joined
Dec 16, 2016
Messages
575
Location
foothills of NC
Rating - 100%
7   0   0
I need some assistance. I did some trading/buying with a member of the Canadian site (before the mass exodus) for a 1996 Jeep Cherokee Classic 2wd with 4.0L inline six. It needed an alternator, so I towed it home to Catawba County. This is a project for my 14 y/o son. It sat for a while, but he finally got the Alternator changed – getting the serpentine belt back on was the biggest challenge. Anyway after the alternator install, it was running great. I took it to work, got it inspected, got tags & insurance. I decided to fill it up with gas after driving to work. When I got home, I noticed a gas smell and found it was leaking gas from the dry rotted seal where the sending unit is attached to the tank. Easy fix – My son and I bought a new gasket and replaced it. Because the gas tank had not been filled in well over a year, I did not know this was an issue. The gas would not leak around ½ tank or less because the gasket is on the side of the tank (about ½ way up the tank). After the gasket replacement, it ran good for a day, then it started to have hard cranks and dying at idle. It generally would crank cold, but not after running for a while. I figured we broke a bunch of gunk loose in the tank via pecking on the gasket ring to get it off – So we replaced the fuel filter. Again – it ran great for a day or so and now is back to the same – It will start cold (sometimes), but dies at stoplights or idle. You have to pump the gas pedal to get it to start.

I’m thinking I may need a new sending unit and another filter. I suspect the gas tank may be corroded due to the bad seal of the gasket. It could not have been full of gas for well over a year and possibly had moisture inside the tank. I’m thinking I may need to replace the tank also or I will be continuously changing fuel filters and destroying sending units.



What say you experts? I’m no shadetree mechanic – and am pretty dumb on these sorts of things!



Brannon
 
Pink_Vapor said:
It's possible the older fuel varnished. I had to drain a tank, pull & clean it out, replace the sock filter & fuel filter.
Ran great after that. Just be careful
Click to expand...
I dont think so - I ran it well over 100 miles before filling it up (old fuel mixed with a few fresh gallons). I had to run it for a while to get it to pass inspection as the computer read "incomplete data" or sometthing because it sat for so long.
 
Have you put a fuel pressure gage on it to see where its at during this? Is the check eng light on?

Pumping the gas pedal, manipulates air. Fuel injection does not work like a carburetor.


So many thing to guess at could be happening.
 
Do whatever @mikeoverlay says....

But I'd Replace the tank...no questions. That's my opinion and I'm sticking to it...lol

DS

Sent from my XT1575 using Tapatalk
 
If it sat for a while and not idling but runs at throttle then I would look at the idle air control (IAC) valve. Take it out and lube the plunger to be sure it moves freely.

If I remember correctly (2000 TJ) it moves by a screw motor. Two 10mm (8mm?) Bolts to remove the IAC valve, unscrew the plunger, lube and screw back in where it is just off the throttle body contact area when you put the IAC back on the TB. It should self adjust once started.

I will add that the tank/pump/gas pressure thought might be the problem it is faster and a lot easier to check the UAC valve first.

-R
 
Last edited:
Mike Overlay said:
Have you put a fuel pressure gage on it to see where its at during this? Is the check eng light on?

Pumping the gas pedal, manipulates air. Fuel injection does not work like a carburetor.


So many thing to guess at could be happening.
Click to expand...
The check eng light is not on. I have not gaged it...yet.
 
Crank sensors in 4.0 jeep motors are notorious for going out and causing these same type of problems. It is located behind the cyl. head on top of the bell housing for the trans.
 
You must log in or register to reply here.
Back
Top Bottom