On most 4x4 vehicles made today require you to put them in neutral before any transitions in changing to 4x4 or back to 4x2. On older models neutral and then move selector to range desired.I hope this will help you. Jesus loves you, John 3:16-17 (KJV)
SOURCE: 2004 Grand Cherokee: oil pressure fluctuates
if you know for certain that the sending unit is correct and the guage is accurate, then yiu may have big problems.....while the engine is running open the oil filler hole.. is everything wet with oil? or does it look dry or just a little lubed? you can allways install an aftermarket oil pressure guage(crappy tire) if you get the same results with that then you may have a week oil pump....worst case scenerio... need an engine rebuild as the moter may have wear issues.does the pressure slowly drop as the motor warms up? at idle ? does it jump up when you step on the gas?
SOURCE: stuck in 4x4 low range
My wife just recently had a similar problem. She got stuck in the mud and put our 2004 F150 in 4x4 Low to get out. She didn't. Had to have AAA pull her out. She then left a bit later and the truck was still in 4x4 Low even after switching to 2WD. She even tried going backwards to get it to switch. So she called me frantically because the car would not go over 10 mph w/o the RPMs getting way too high. I said I'd call her back. So I called our local Ford Repair shop and he gave me these instructions (loosely based on what the owner's manual says to do) 1. Start Vehicle 2. Switch to 4x4 Low 3. Put in Neutral 4. Switch to 4x4 High 5. Go in Reverse for a bit and then Forward a bit again (You should now be in 4x4 High) 6. Put in Neutral 7. Switch to 2WD You should now be good. If that didn't work, then try repeating step 5 after step 7. Which reminds me. I really should call her back :) (It worked)
SOURCE: My 98 s10 is stuck in 4 wheel drive low.
Pull the kick panel on the passenger side. there is a small box mounted there that is the computer that controls the actuator for the 4wd system. this is notorious for problems due in fact that the connector likes to pull out and away from the module. I had the same problem and the solution is simple.. take a long zip tie and get it between a few of the wires and around the module. tie it in and have a nice day.. it wont come off or try to pop out anymore and you should have no issues getting into 2wd, 4wd h, 4wd L.
SOURCE: 1999 Jeep grand cherokee limited - irregular idle
I don 't know if I can solve it, but I had a very similar problem on a 2002 Grd Cherokee Laredo. It ended up being the Throttle Positioning Sensor (TPS). Unfortunately the part alone is about $125 and and total installed cost was about $250. It would idle high at first, then gradually work it self down to a normal idle. Once it was warmed up it it would have an up and down RPM during idling, and several times it stalled out at intersections. There was also a lot of transmission clunking going on when you put it in reverse or drive.
Runs like a dream now. Clunking is gone and idle speed is just right.
SOURCE: 1998 Jeep Grand Cherokee Laredo 4.oL I got a code po113
Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input
Print this code data
Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Check with ignition on or engine running; battery voltage more than 10v; The PCM detected the IAT Sensor input was over 4.90v (exc. Dakota, Durango, Ram) or 4.98v (Dakota, Durango, Ram) for 3 seconds.
Possible Causes:
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