So! I bought this 2005 Laredo 4.7 4x4 a few weeks ago. I noticed that when the vehicule is cold, it will hesitate for the first 1 minute of driving. It's realy slight but you can feel it's there. Also, when the jeep idles at a stop light the rpms will sometimes drop from 6-700 to 450-500 up and down (hot or cold engine). There is also sometimes a big drop in rpm when applaying the brakes strongly; it feels like the engine will die but at the last minute, the rpms primes up back to where in the operating range. I did'nt really care about it till yeasterday; while I was driving with my 15 months old son... Leaving from a stop and making a light turn on my left, the engine died, I lost the power stearing and I had to stop the jeep and restart again... Pretty scary and unsafe with a baby onboard!
I also noticed that at cold starts, the engine shakes a little just like a misfire... And I experienced for the first time yesterday the same shaking feel while backing up and steping forward at idle??
Any clues? I have good records for the thing and all of hem done at a dealership. The Tbody has never been cleaned, it has the original EGR valve... It does not trow any code. Should I start there or is there anything else I should look for?
One last thing... Sometimes I will experience a Service electric brake system. and the electronic stability light lights up... It always happen when I have my foot on the brake pedal...
Thanks in advance for your inputs!