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1999 Jeep Grand Cherokee Questions

Get answers to questions about your 1999 Jeep Grand Cherokee at RepairPal. Find solutions, diagnose problems and get back on the road.

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151
questions

I disconnected my holiday trailer wiring

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.

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