My 02, 4.0 jeep stalls, I do not have an idle valve ot posistion throttle sensor on throttle body, changed in-line fuel filter and still same results. phill
When it stalls is just as important as that it stalls. Random stalling while driving and re-starting after a wait can generally be traced to either a bad fuel pump or a failing crank position sensor. Neither component is cheap so I'd do some testing before replacement. All Jeeps have an idle control valve and throttle position sensor. Control valves can get gummed up. Control valves can usually be cleaned out by spraying carb cleaner into the passage in the throttle body bore. In severe cases, the control needs to be removed. If you remove it, DO NOT turn the part that goes inside the TB...just spray it off and clean inside the TB. Make sure you don't lose the small "o" ring. Test procedures are outlined in both Chilton and Haynes manuals. BEFORE doing any testing, verify that all your fuses are good in the power distribution center and inside the drivers compartment. You can also get a free scan done at most larger parts stores. OK, I've given you the most common reasons for stalling...There are others but testing all systems is the only way to determine that.
SOURCE: PO171 OBD-II Trouble Code " System Lean To Bank 1
Check PCV valve and be sure it is not stuck open. Check for vacuum leak at intake manifold.
SOURCE: Describe your 1997 Jeep Wrangler 1997 jeep
The check gauges light is normal because at 400 rpm it isn't running fast enough to build sufficient oil pressure. I am guessing maybe a vaccum leak???
SOURCE: 1998 Jeep grand Cheroke hard cranking, sputtering, rough idling
In READING what you wrote, it appears that your car is difficult to start and pretty much is rough while running....It also appears that your are randomly replacing parts...How did you verify that the parts your have replaced had failed? I suggest you get a basic manual like chiltons or haynes as well as a decent digital volt/ohmeter, then do some testing. Pay close attention to map sensor test and manifold air temp. Having a good fuel pump does not insure that your injectors are clean enough to deliver a good spray pattern This will not show up on any test...you need to actually look at them. There are other items to look at but I think you will likely find your problem in what i mentioned. (you already checked for vacuum leaks, right?)
Good luck!
SOURCE: 04 Jeep starts but stalls when put into gear.
make sure your idle air control motor is working, if you give and hold gas pedal a little will it stay running in drive.
SOURCE: Engine revs up and down, hesitates with slow take
change your throttle positionig sensor its going bad
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