2002 Grand Cherokee V8 Ltd. Start Up Prob. w/ Misfiring!
I'm a Newbie here, and I desperately need some advice and help here, hope you can bare with me with the long post here.
I have a 2002 Grand Cherokee Ltd. V8 w/ only 39000 miles!
About 2 weeks ago one morning, I started my car first thing in the morning while the engine's completely cold in my garage (I'm in CA), the car idles so rough my steering wheel was totally shaking, then soon after the Check Engine light came on. I could hardly drive the sucker, it was reving so rough and low, only until the engine warmed up a bit (about 5 minutes) then it seemed to run ok.
I then immediately took it to the dealer nearby (Simi Valley Jeep), it took them 3 days to find what the problem was, they found some of the cylinders were Misfiring and they ended up replacing a Fuel Pump, and it ran really good and smooth.
4 days later (yesterday!), all things back to square one again, I immediately drove it back to the dealer's service dept. They called me back about 3 hours later, and told me that their mechanic had reconnected the connectors to the fuel injector and it seems to run fine. all the cylinders were in sync (all they did was disconnected some wires then reconnected them!)
I drove it home, waited for couple of hours, then I started the car, the engine didn't cooled down completely, about 1/4 way up on the gauge, then it all happend again, idling really rough, the check engine light came on again.. the same old thing's happening again.
I drove it back again, and now it's in the shop, and I'm clueless and it seems to me that they're clueless as well.
It seems to me the Simi Valley Jeep dealer's Service dept aren't really all that detail oriented, they made some stupid assumption and thought it would work and didn't bother to test the vehicle, didn't bother to let the engine to cool down completely to do the tests afterwards.
Anyone could give me a helping hand here on what might be the culprit, I'd really appreciate it.
I've only had this car for less then 3 years....