When im driving about 50mph my d wants to shift from overdrive to drive constantly, parked in driveway idles up and down, i unplugged the iac and it seemed to level out in park idleing, just wondering if the iac is the problem or not. this issue is drivin me crazy.

 

Low fluid level on your tranny would also cause it to search between gears. Low idle stumble is also cause by a dirty throttle body. When running, I will pull the hose leading to the manifold intake and spray crc throttle body cleaner pointed towards the butterfly, open the throttle when your doing this or it will stall. I had a Dakota and a Durango experiencing this issue and it cleared it up for me on both. The Dakota was bought brand new, at about 30000 miles it wouldnt stay running, the dealer said there was nothing wrong,but offered to clean my injectors for a crazy price. I said no, took it home and used the spray, it cleared right up.

 

trans fluid is fine i will try the crc and see if it resolves my issue Thanx

 

Could be a bad TPS.


Also first try and clean the Throttle Body and see if that helps.

 

I ended up takeing it to a reputable mechanic shop in my hometown they said it was the computer they put a new one in i took it home drove it around still not fixed took it back they sent it to the dodge dealership they saod it was crank sensor they put it i drove home still acting crazy took it back they said it was a power steering switch that was leaking power steering fluid on it and shorted out they fixed it drove it home STILL acting up took it back they said they dont know whats wrong. ANY SUGGESTIONS?

 

WHat about the fuel pump? Did you check it out?

 

What is a PCM?

 

pcm powertrain control module, its the computer that controls the engine