Well, Im assuming this is more hemi-specific than durango-specific. The ram section seems way more active, soooooo, here goes...

I was "playing" with a 6'er firebird tonight in the Durango. He was flying around, thought I would have some fun. When I finally got him to play, from about 15mph, we went at it. The first run, the truck only revved to about 4500 or so, maybe a little more, then it basically shut down, almost as if it cut the fuel. Weird. We get another chance, same start, I manage to get up to the shifting point, w/e exact rpm that is. Right before making the shift, the truck just shut down again (I managed a 1 truck lead by this point ). I have also experience this type of "shutoff" when having the truck in N or P, revs to about 3500 or so, then shutdown. (< this happens in the ram too).

Im mainly concerned with the issue at wot, not for racing purposes, just in general. The D never acted like this under wot before the exhaust addition. I had the resonator removed along with the muffler. I wouldnt imagine this creating in backpressure issues, as the FM is chambered. ANY ideas/suggestions? This is the wife's truck, unwarrantied, so Id be up the creek if anything was to happen. ( I know I know, shouldnt have been playing, buts it all I have since I wrecked my stang).

Although 78% retarded, Im not a complete utter idiot, but I am fairly new to the hemi and dodges in general (Ima ford boy too ) Thanks in advance for the time reading this and any help offered.....

 

Quick theory here. Quite possible totally wrong and absurd, but I'll try.

With the more free flowing exhaust, would there be more air trying to be brought into the motor? If so, would it be enough to where the pcm would adjust and try to add more fuel to the mixture? If so, then the fuel pump might not be keeping up, or the filter could be the culprit too? < this is a question also.......

This would make a lot more sense if I added a mod that purposely induced more air into the motor (i.e. cai), but, I just thought of this, and decided to throw it out there. Even if not applicable to my situation, could this concept be correct?

Again, any help fellas is ginormously appreciated.

 

I've pushed my 2nd gen Ram to the cut -off point, but haven't pushed my 3rd gen Hemi that far......yet.

PCM has rev limits set (not sure what they are) your probably hitting. Seems like I was close to 5000 when my 2nd gen shut down.

Yeah, it's annoying.....but you can always buy a programmer...

 

Ive always wondered what redline was on these motors, since its not marked on the tach. I have to imagine its not really 5k, but thats the factory regulated limits? Anyone experience this problem in any other hemi-vehicle? Could this actually be D-specific problem? Also, those with the tuners, what is the actual redline of these motors? I would think upwards of 58-6200 maybe?

Sorry for the flood of questions, but Im eager to find out the "problem", plus learn as much as possible in general. 'Preciate it...............

 

Yea there's definitely something wrong...the out of gear rev limit is 4k and in gear has to be around 6k. It sounds like you're hitting the out of gear rev limit while in gear....which is weird. Did you try moving the gear selector at idle after this happened? It could be something as simple as a neutral safety switch that's a little worn and wasn't tripped when you put her in drive.

 

i had that prob when i was switching gears manually..(1st to 2nd) and it redlines at 6300 ish but the truck normally shifts b4 that...not really sure i hope you figure it out, maybe use this prob to coax the wife into buying some performance parts

 

I have had a couple situations before where Id throw it in R, the selector would say R, but the motor just revs. I would throw it in N, then back in R, and you could feel it "drop" (go into gear). So maybe this could have happened in D also? IDK, maybe. I went wot a time or two while rowing through traffic (getting someone off my ****, having to make a sudden lane change) and didnt have any problems, felt right damn beastly.

As far as these safety switches, is this something a handheld could fix? I guess I could take it to the ol' man if needed, he's a very prominent tranny man around these parts.

Thanks for the responses fellas. Today kinda eased my mind a little bit, the truck not acting up. But, of course, it would happen when I try to play a little bit......might be telling me something. (if so, its falling on def ears ) Any other advice/ideas/help would be greatly appreciated still. Also, any modding tips would be good. I know the starting point is CAI, then maybe a tuner. Any other cheapies/freebies? Thanks again.

Edit: The N revving to 4k sounds about right, I was off a little. Is this a hemi thing, or dodge in general? As said, my ram does it too, so I feel better knowing its "supposed" to be like that (hopefully for the 4.7's too)

 

Mine shifts @ 5600rpm @wot.

The P/N 4000rpm limiter is there to keep squirrels from blowing up the engine while free revving it out of gear.

 

My truck revs past 4000. I think the limiter when out of gear only affects the auto trans trucks.

 

Yes it does.