My 99 Jeep grand cherokee has developed a constant high idle, when in park it idles around 2000rpm, in drive it idles near 1500rpm. it has error code 0505 which is iac valve. Replaced the iac valve with a mopar one. Still doing it. it has been like this for about a month. no vacuum leaks, checked over all the wiring and no breaks anywhere. But now, all of a sudden since it started getting warmer outside, when the vehicle gets to optimal temperature, it stalls, and wont start. I figure crankshaft sensor. but could all the problems be related to a faulty pcm? how would i know? im really short on cash but need the vehicle.

It's running very rough. I changed spark plugs about 3 months ago. Just replaced # 7 coil, it didn't help. All vacuum hoses are OK. Any suggestion? Thanks, Lac.

To keep it running I had to press the gas down for high RPM. It would stall right when my foot off the gas pedal

The engine has shut off while driving 65mph on a four lane highway (very scary) as well as 30mph. This has happened 7 separate times now. The engine will restart only after removing the key and waiting 2 to 3 minutes before reinserting the key. No codes register on the computer. Mechanic states it could be numerous issues but is not REALLY sure.

my security system stop working driver door don't open with remote. truck will start but only run for 5 seconds all other doors work with remote gauges don't work security light on dash broad don't flash when i lock doors with remote.

Windows,locks, a/c quit working after few days. Battery is new, when I disconnect negative on battery then put back, all resets and works for a few days. All motor functions are normal. On dash there is a lighted picture of a key on right side. Is this a clue to the malfunctioning component? Also noted the brake lights both right and left have melted filaments on driving light bulbs. Is something shorting the electrical system or computer? Causing the items mentioned to work for a while as a complete normal car when PC is reset, then shortly all goes weird?

when I pressed gas, car made grinding noises. think it is hubs not disengaging. any help would be great.

Replaced it but died twice

I have changed all the pistons and forgot to number the rod and caps. I got to the 5th cly and it moved free by hand I put the last cyl in and it will not move by hand what could be wrong?

After engine starts it go OFF and back ON

The EL pnel has a blue/black molded into it Ther is current up to the connector

It is a 1999 jeep grand cherokee limited v8. I have heat and air, but you can not hardly feel the air. you can feel the air if you put your hand about 6/8 inches from ALL vents. If your luck you can feel it on your chin. The dash has been out 2 times replaced the acuators the mechanic said nothing is blocking the flow but IT SOUNDS LIKE A VACUME SWEEPER THAT HAS SOMETHING BLOCKED IN THE HOSE and blows very litte air on high and if you put mid way for the blower you can not feel any air...does anyone know who I can get to fix this my mechanic gave up he said I have to deal with it that nothing is wrong, but when I first bought this car in 2005 the air was great, so I know it will work if only I can find the right person highly trained in my area which is Masontown pa. Any help would be greatly appriciated....Thanks in advance....

there are times my gauges on the jeep that do not work and all the lights are on, heater and a/c does not work, sometimes the light of the not the right key turns on and now the alarm control does not want to unlock or lock my doors and the jeep starts but does not stay on. I took in when the check engine light was on and all it said was a miss communication error. Please I would to fix the problem. TYhanks

I changed the TPS, Mac Sensor and oxigen sensor and the car continues whit the same problem.

I replaced the tre's the steering box, and the sway bar with no luck, i really need to find something to fix this as I am running out of money, slowly replacing the entire front end. Is there any way to know id the bearings or ball joints are bad without taking the front end apart?