Top 10 2003 Jeep Wrangler Questions & Answers

My Death Wobble started immediately after I installed a set of Coil Spring Spacers (to lift 1.75 inches). Turned out, the DW was because while changing the height, I also lowered the CASTER angle in the front end. So, to fix it, I could have purchased a set of eccentric bolts for $50+. Instead I went out and purchased a piece of 1.5 inch flat bar for $10 from OSH. I cut out 4 1.5 inch squares. Then i drilled 7/16 inch holes centerline, but close to one side (in exactly the same place) on all for squares. I then removed the lower control arm bolts, nuts and washers. I installed these square offset washers I made so the front axle would be pushed forward (to increase the Caster angle). The toe setting changed a bit, so I reset them to about 1/8 inch toe in. After driving my Jeep, I noticed there is no more DW. The steering wheel was off center, but after 3 attempts, I have that perfectly centered. I have every intension of having the alignment checked, but not till after I find the new tires I want. If anyone is interested, I can draw out and photograph the cure and send it to you. My e-mail is bb62471(at)yahoo(dot)com.

MY HIGH BEAM LIGHT IN DASH DOES NOT WORK JEEP tJ

check the casting on your replacement water pump..4.0l engines require a reverse rotating water pump..may be causing your problem.

4.0L Engine To Remove:

1. Disconnect negative battery cable.
2. Lift the vehicle.
3. Drain the engine oil.
4. Remove or disconnect the following:
   • Exhaust pipe from exhaust manifold.
   • Exhaust hanger at the catalytic converter and lower the pipe.
   • Starter motor.
   • Flywheel/torque converter housing access cover.
   • Oil level sensor (if equipped).
5. Place a pole jack under vibration dampener with a piece of wood between dampener and jack.
6. Remove or disconnect the following:
   • Engine mount through bolts and raise engine for clearance to remove pan.
   • Transmission cooler lines (if equipped).
   • Oxygen sensor harness from oil pan mounting studs.
   • Oil pan bolts and studs.
   • Oil pan and gasket.

To Install:

1. Clean the gasket mating surfaces.
2. Apply Mopar® Silicone Adhesive Sealant or equivalent onto the cylinder block in four location as shown.

1. Attach the pan gasket to the oil pan with Hi-tack or equivalent (2003-2005 vheicles).
2. Use 1 ½ x ¼ inch bolts to fabricate alignment dowels. Cut off the head of the bolts and cut a slot into the top of the dowels (2006 vehicles).

1. Install two dowels into the timing case cover (2006 vehicles).
2. Install two dowels into the cylinder block (2006 vehicles).
3. Place the gasket over the dowels and onto the cylinder block and timing case cover (2006 vehicles).
4. Position the oil pan.
5. Install the 1/4 inch oil pan bolts. Tighten to 84 in-lb (9.5 Nm).
6. Install the 5/16 inch oil pan bolts. Tighten to 132 in-lb (15 Nm).
7. Remove the dowels.
8. Install the remaining 1/4 inch oil pan bolts. Tighten to 84 in-lb (9.5 Nm) (2006 vehicles).
9. Lower the engine onto the engine mounts.
10. Install the through bolts and tighten the nuts.
11. Remove jack stand and remove the piece of wood.
12. Install the flywheel and torque converter access cover.
13. Install starter motor.
14. Connect the exhaust pipe to the hanger and to exhaust manifold.
15. Install the transmission oil cooling lines (if equipped).
16. Install the oxygen sensor wiring supports to the oil pan mounting studs.
17. Install the drain plug into the oil pan. Tighten to 25 ft-lb (34 Nm).
18. Lower the vehicle.
19. Connect negative battery cable.
20. Fill the oil pan with oil. WARNING
    Use extreme caution when the engine is operating. Do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
    
21. Start the engine and inspect for leaks.

The code P1294 means that the computer is setting a target for the engine to idle at and the engine cannot do it therefore setting the DTC. Solution start by checking or replacing the sparkplugs. Also remove the idler motor from the throttle body and spray it out with carb cleaner. Also spray out the passages in the throttle body that the idle motor use. If that does not fix it you could have another problem like a bad idle motor or something relating to that circuit. Did you replace the TB or make an adjustment to the TPS?

Unless this happens in the rain as well, I would not worry about it. Likely in the car wash, far more water is coming in than the normal drain system can handle, therefore causing it to overflow. If you do have a drain obstruction, find the drain hose (small right angle hose on firewall passenger side) and roll it in your fingers to clear it.

A code P0123 may mean that one or more of the following has happened:

• TPS not mounted securely
• TPS circuit short to ground or another wire
• Faulty TPS
• Damaged computer (PCM)

Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, carefully inspect all wiring and connectors that lead to the TPS. More than likely the problem is with the TPS wiring. Check the voltage at the TPS (refer to a service manual for your vehicle for this specific information). If the voltage spikes or is too high (over 4.65 volts with key on, engine off), then that is indicative of a problem. Carefully trace each wire from the TPS wiring harness to check for breaks, rubbing against other components, etc.
A code P0121 may mean that one or more of the following has happened:

• TPS has intermittent open or short internally
• Harness is rubbing and causing an open or short in the wiring
• Bad connection at the TPS
• Bad PCM (less likely)
• Water or corrosion in connector or sensor

Possible Solutions 1. If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to the specifications mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you can't use a scan tool. You'll need an oscilliscope. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern. Does it drop out? If so, replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector. If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage. If it does, trace circuit for short to voltage and repair.
6. Look for any water in the connector and replace TPS as necessary.
P0152 Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 1)

I seriously wonder why Jeep used that engine at all. We have several Jeeps here and the only one I hear nearly every week about power and hill climbing problems is the one with the 4cyl. (same year as yours).
Adding a taller tire is definitely not a plus. No idea what your gear ratio is but lets say you have 3:73's...with a tire two inches taller, the actual final ratio is around 3:23. Put the small engine up against it and you have about as much grade or hill climbing ability as a ride on mower!
There are three practical ways of getting back some performance. The first is simply putting a lower tire on it. Second would be to replace the stock camshaft with one with a better torque curve, perhaps adding headers and an aftermarket intake system as well. Third would be to change both gear sets to something in a 4 series (expensive). Then, you have two even more expensive options: Put a 4.0 engine and all that goes with it into the vehicle or start playing with turbocharging.(you really need to know what you're doing to do that right).
Your last option is regardless of how much you like your Jeep, sell it and get one with a 4,0 already installed!!!

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which engine? 4.0L? which trans, stick or a/t?
can you show the location of the fuse exactly.
each fuse has number and the schematics show only the F number.
is the fuse in the front PDC box, under hood>?
PDC fuse F9 blows, 30amp fuse???? no lower.

need exact fuse to wax smart, i do not have the oper guide that shows, names.
1: wires to it or to PCM shorted that line.
2:PCM bad.
3: OR SOME THING CONNECTted to PCM is shorted.
finding intermittent can be hard, i use, tools that allow me monitor those lines, an ammeter (clamps on wires) id check for wire damage first.
things that can overload the PCM are:
the Alternator Field source pin,
the ISC motor.
both 0xy sensors the heater can not be shorted.
the speed control servo,
in all cases wires too not shorted.
its not the injectors it has its own fuse f28
all comments usa car and guess 4L
now my wild guess, the 02 wires are melted and touching hot exhaust, seen vast times.