Wrong fuel in cherokee

is this car in uSa, NO,or Europe?, you posted to a USA forum. ok?
our USA Cherokee ended 2001. so my guess is you have
a European Cherokee? KJ is like our KJ Liberty, using our name
car is not the same,. (kinda SAME,but not identical)

Forget that. ill answer simply,
fuel tank has fuel pump
to a filter above and fuel lines to the v6 fuel rails
and last the Injectors, that is all there is on fuel side
the injectors are fired by complex electronics called EFI
try Chevron techron additive to tank (read bottle side do as says)
end snake oil fixes....bla bla...

rough idle is misfire, and 50 possible causes
#1 cause is NO TUNEUP in last decade
#2 did you scan it yet, to see who is misfiring, seems not.
and more lots lots more, if not above
one is bad fuel.. old or someone put wrong or bad fuel there.
lots.
P= fuel pump below
F= fuel filer is here 2002.(again,USA MARKET)
WHY ASK YANKS THIS?


why not get the car serviced and now make it worse.?
guessing.

tune up, spark parts, filters. like that?
do that?

1996 jeep grand cherokee stalling at lights or stop signs - Forums ...

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CNETJun 11, 2015 - My jeep grand cherokee 1996 has started stalling when at lights, stop signs, in park or ... It starts and drives but after stoping at the stores and parking when I came out I ... Mechanic changed already crank sensor, distributer pick up, fuel pump, idle .... Symptoms like the Jeep running fine, then stalling without warning usually ... 97 Jeep Grand Cherokee Laredo keep dying upon ignition
Jun 11, 2015
1996 Jeep Grand Cherokee just stopped while driving.
Jun 10, 2015
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Missing: pig

It could have a clogged fuel filter or a failing fuel pump. Contaminated fuel, clogged injectors. Check for vacuum leaks.
Crankshaft position sensor failure is common on the 6 cyl grand cherokees.

For jeep grand Cherokee fuel injectors replacing, i suggest you to go the help oink provided below:-----

Its a complete step by step procedure to do so:-----

Fuel Injector Replacing Jeep Grand Cherokee

http://www.howtorepairguide.com/2012/11/fuel-injector-replacing-jeep-grand.html
-------------

How to Replace a Fuel Injector
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-injector.html-----------

How to Test and Replace Fuel Injectors on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-test-and-replace-fuel-injectors.html
------------

How to change fuel injector on 2005 gmc envoy?
http://schematicsdiagram.blogspot.in/2012/03/how-to-change-fuel-injector-on-2005-gmc.html
------------These will help.Thanks.

The computer grounds the fuel pump relay for 3 seconds to boost fuel pressure on start-up. If the computer does not see oil pressure or RPM it will not continue to ground the relay.
You would need to bypass the relay and see if the pump continues to run, then check the relay and the ground signal from the computer.
The gas gauge problem may be connected or something different.
The connector at the gas tank may be faulty which would affect both the power for the pump and the fuel gauge sending unit.

The car cranks and turns over but will not start. Surely this seems that the fuel setting can be wrong , the valve timing. I suppose the fuel pump calibration and also the injectors and glow plugs must be checked.

Some tips on the link below;

http://www.fixya.com/cars/r5843031-tips_check_car_not_start

your primary is in the tank connected to the fuel pump(but usually doesnt need change unless something goes wrong and u need to change your pump.)your 2ndary filter is on the frame rail on the drivers side, just above the rear tire. Two hose clamps and a 11mm bolt on the fuel filter strap.Remember to relieve the fuel pressure from the tank and test port on the fuel rail that connects the the injectors.

fuel pump

Have you had it scanned for codes (free) at big autoparts store yet? That may point everyone in right direction. If that doesn't tell you the obvious problem/fix, get back to us with any codes they told you, and we'll help you out.
How long does it have to sit before re-starting?

Either your too rich and gas is getting by the piston rings going into the crankcase(oil pan)or you have a defective fuel pump (even if it is new!!)IT'S one or the other!!Running the car very rich for a period of time will have fuel in the oil!! I run mind rich for the nos and smell gas in the oil when draining it and only have a few passes on the motor with the nitrous,but runs extremely rich at idle because the timing is backed way down and running a colder plug causes a rich condition!! Plugs will foul quickly also!!