20 Most Recent 2003 Jeep Grand Cherokee - Page 7 Questions & Answers

Check hoses around your gas tank. We had to replace all of mine even after a new gas cap was put on.

no engine option stated so Impossible to answer

5speed, bad rev. switch or fuse A/t tranny, bad PRNDL swithc (R = reverse) use a voltmeter to find bad 12v do switch or from switch to lamp so easy, a $10 tool and zero guessing. if you wiggle the shifter does it sometimes good>?

the car has 2000 parts. is this A/C part.? (HVAC system chapter , FSM) the A/C does in fact have an expansion valve with orifce inside. its in front of the EVAP core. sure where is that, that is in that black box under dash with same name EVAP in front of USA LHD , passengers knees..

scan it and post all DTCs. and engine size. we can not guess either.

Does your jeep have rain sensing wipers? If so, then the intermittent caracter is ok.

It is probably is the heater hose or the heater return hose.

Most vehicles have it on the throttle body.

without actually hearing the noise , there's no telling what it could be. a few things come to mind .a relay or signal flasher , a piece of trash in the blower fan blades , or an actuator for the vent doors trying to reset itself. a good scanner can tell you what you want to know , except for trash in the blower fan.i use a snap-on soulis pro. usually you plug in under the steering wheel to a 6 pin blue conn. for the GEM module. it tells you all about the things that are going on in the interior of the vehicle. with a good scanner you can actuate things to see them work.fun to watch too .

You should try getting the factory part because this is a common issue amongst jeep grand Cherokee's. it could also be the location because it is behind the bumper underneath the head light and that is an unusual spot for it to be placed.

Disconnect the fan plug and hot wire it to the battery if the fan dosen't run, replace it. Otherwise, check the relay. The system operates by the temp sender sending a signal to the computer that activates the relay that turns the fan on. Fan should also come on with A/C.

Take spark plugs out and see if it will crank over. It may have gotten a hydraulic lock due to the overfill of oil. With the spark plugs out it should purge out the hydraulic lock on oil if that is the case. Or it may be the starter.

Probably not related to too much oil; If it cranks over and doesn't start it is either a fuel problem or a spark problem. If it won't crank over it is either a battery problem or a starter problem.

Have you done anything else to it? Did you install fuel filter or a shop? You might check too see if it was installed correctly, they fit in a certain direction. The next thing I'd check is the fuel injectors. Does the check engine light come on? If so, O'Reillys and I believe Autozone will check codes for free...

Throttle Position Sensor? Has that been replaced? Relatively inexpensive and easy to do yourself.. Cleaned the Air Mass Flow Sensor? Cleaned Throttle Body? Have the spark plugs and wires been checked?

You need to have the codes scanned to see where the problem lies. It could be as simple as dirt in a sensor, an unplugged sensor, or something more expensive like an ABS pump or control module. If you don't have a scanner, many auto parts stores will scan your codes. Your brakes will still function but you may not have ABS kick in when braking.

if there is one, it'll be in the p d c = power distrabution center. should be a relay also. usuauly the relay is energised by the high pressure switch and or the pcm.

faulty ignition switch or the starter motor its self ,have the OBD codes read as should point you to the faulty component

Which engine/transmission? Could be a gearshift cable rigging problem, or eventually a problem in the valve body.