i have a 89 jeep xj 4.0. it started dieing if you gave it gas. 3 of my friends and all very good mechanics said fuel pump. so i put one in just now and i have to same prodlem the jeep will fire up purr like a kitten for a few minutes and die. if i try to drive it it will drive ok then act like it is stavred for fuel and lugs way down and dies?? i am out of ideas. i replaced all the rubber lines the fuel filter and now the pump same outcome it just runs a little longer before it dies now.. :?| :x
jeep idles then dies
- Thread starter blown XJ
- Start date
Is it that the Jeep runs great when it's cold, and as it warms up it runs poorly? i.e. - if it dies out, you can wait 5 minutes, and fire it up again and have it run, or do you have to wait for the engine to cool down?
no i can start it right back up after it dies and it will run for a few minutes and die again.. i have replaced almost everything in the fuel system except for the injectors (filter and pump, soft line) very madding. it is my daily driver now i am forced to drive my barely legal tuff truck everywhere..
so i just thought of some more questions. could it be thtottle position senor? or i buy gas a good place but would bad gas do this?? i got bad gas once and it ran rough but not like this.. of the pressure regulator, and last and the one i would hate to be true could this be caused by bad injectors??
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Utah_jeepster
Super Moderator
When it dies pop the hood and along the fuel rail should be a shrader valve (like the air valve on your tires) Hit the inner core once with a screw driver and see if you have fuel pressure in the line. If it does then your most likely facing the dreaded computer problem that many of ZJ's face. If you try this route go with an after market computer from Autozone, one it has a life time warranty and they opened it up, adding extra cooling fins to one of the processors, better than factory does.
If it was one of your motor sensors it would have thrown you a code by now.
If it was the injectors maybe one or two would be giving you a problem, but all six at once, highly unlikely.
Bad fuel will happen all the time not running for five minutes then die. And water in the fuel will only show up when your almost out of fuel due to the fact water floats on top of gas.
If it was one of your motor sensors it would have thrown you a code by now.
If it was the injectors maybe one or two would be giving you a problem, but all six at once, highly unlikely.
Bad fuel will happen all the time not running for five minutes then die. And water in the fuel will only show up when your almost out of fuel due to the fact water floats on top of gas.
rockymtnjp
New member
Just a thought, check all vacuum lines and hoses, I have seen a few trucks come in in the past with the same issue and it simply was disconnected, or had a hole or crack. Also I had to replace a catalytic converter once (95' Jimmy) because it was so clogged that the exhaust was going right back to the engine.
Once again, Just a thought.
Once again, Just a thought.
Dry suit diver
New member
nope, gas floats on water its less dense, thats why you can't use water to extinguish an oil fire( well one of the reasons, another is it flares up like billy o.)
it sounds electrical rather than fuel ,likely the TPS but it could be the ECU especially if you haven't got any fault codes showing up, or would you not get this on a 89 model, did they have OBDII ?
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