Dears:

i really have 4 problems in my Cherokee sport model 2000 4.0L L6 MPI and i heard some near advice but i want to make sure:

First , when the car goes 130 M it start to shake at 140 stops shaking after that 145 starts agian ( my tiers is new my helper is new ) some told me its power problem any advice

second, when i start my car i feel some lettel strong shaking inside the car my seat shakes comes and goes even if i stop at trafic light if i ope the AC the shaking stops ????!! i really dont know

third , i was checking the car sensors and they told me i need to change the TPS sensor can you tell me what is this for ?

4th , i have some noises in my car in the rear part under the wheels they told me its the leaf spring i think this is its name , if i leave it like this without fixing it dose it effect the car?


Thanks

Let's start at the beginning... sounds like a good place to start.

1 - You say you have new tires? Were they bought at a reputable dealer? Were the wheels balanced?

2 - I'm not sure about this one... First, I would check the pulley where the serpentine belt drives the A/C. Watch it when the engine is running (Not too closely, though). (:confused: A/C clutch???)

3 - The TPS (Throttle Position Sensor) tells the computer where your foot is on the skinny pedal. If you aren't pressing the gas, it tells the computer to idle. The most common symptom of a bad TPS is the Jeep stalling at idle. At about $40 and 30 minutes, this is an easy fix.

4 - If you don't mind a squeaky saggy rear with a bouncy ride, go ahead and leave your springs how they are.

Good luck! :)