Dodge Repair Questions? Ask a Mechanic for Answers ASAP
So you are having throttle control problems?
Which engine do you have in your jeep?
Any idea what codes it is setting?
It's a very common problem, but the system at fault should be easily identified by the trouble code that is set.
For example, if the code is a p2138 then the problem is most likely the pedal position sensor.
If the code is a p2100 or p0123 then it's a throttle body problem.
Any time we see dealers that "can't figure something out" it means that they are taking a number of customers for a ride and just throwing parts at it because they can get away with it.
Do you think you could get the codes scanned to see which system is setting the error message?
The codes will most likely only read when the check engine light is on. Pretty much all parts stores will scan codes for you for free nowdays.
When the problem is happening, will the engine crank but not start, or will it not crank at all?
It should be stored, but if it's not setting a hard code you might have to order one of those $20 bluetooth scan tools that works with your smart phone from amazon. I keep one in each of my personal vehicles just in case a code pops on.
If you have a multi-meter you could fairly easily check the signal from the pedal position sensor. You could also try slapping the gas pedal up and down a few times and then see if it will start when it is acting up. If it starts after doing this then you know you have a bad spot in the pedal position sensor.
If you have a multi-meter check the voltages at the Accelerator Pedal Position (APP) Sensor with the key in the run position, Pink/Yellow and Yellow/Pink wires are the 5 volt power supplies. The sensor ground wires are the Brown/Violet and Brown/Yellow and should have less than 50 mV present. The signal wires are White/Brown and Brown/White, one runs about half the voltage of the other one, expect to see 0.2 to 2.5 on signal line #2 and 0.5 to 4.0 on signal line #1.
I'm in Albuquerque. I'm leaving the shop in a few minutes, but I'll check back in this evening to see if you need any additional info.
Sorry. I was out of pocket all weekend. My wife's car is acting up and I spent all weekend taking it apart and putting it back together.
Were you able to perform any of the electrical tests on the APP?