Hello, I have a 2004 Dodge Durango 5.7L Hemi 172K miles

ENGINE CODES: P2173 (Throttle Actuator Ctrl Sys-Hi Airflow Detected) P0300(Engine Misfire) Engine light*

When i get in my Car it will start fine, but when I start it cold you can feel the engine misfiring or running rough (Bad fuel/air ratio), When i step on a brake to slow down (especially in a parking lot/heavy traffic) when its running rough I can feel the car trying to push in a repetitve jerk in 1 second intervolve and it will become even more rough and the ETC light will come on or the RPM will fluxuate from 700-1300.

I replaced the Throttle body with a completely new one.
My guesses are that its a Map sensor or a vacuum leak.
vacuum leak in the intake manifold?

When I am driving it will drive great except for that randomly the ETC light will appear and the call with go into limp in mode or my car will just stall. When i restart it the problem will go away.

Thanks!

 

I recently ran into this problem with my '05 Durango, except that mine had the ETC light stayed on continuously. I removed the black plastic intake down to the throttle body. There I found that a MOUSE had chewed into the wires on the left hand side of the TB (looking at the engine), and had chewed one of them in two. I reconnected the wire, and all was fine.

If you suspect a vacuum leak, I would take either oil (and put a small line of it) wherever you suspect the air leak might be. Or, you could spray WD40 where you think it might be. This will temporarily stop the vacuum leak. Did you replace the gasket around the new throttle body? If not that could be your problem...

 

Thanks for the advice and no i didn't change gasket.
I changed it out yesterday and no other problems arouse, but i will change it because i did read that you are suppose to swap it out. When you mean gasket are you talking about the thick rubber piece for the throttle body or the thin circle on the back side of the Throttle body

 

I mean the thin piece behind the throttle body. Not the thick rubber piece where the black platic part of the intake assembly goes onto the throttle body. Although, if it were me, I would check the rubber piece for cracking and deterioration. If it is very old, it may show these signs. If it does, I would replace it as well. It should be ok though. But I always check the parts I remove for signs of cracking, especially on the newer model cars because of all the plastic crap on them that can deteriorate over time.

Just a good rule of thumb to follow...