Today while i was driving I did a WOT shift from 1st to 2nd and heard a loud pop under neath the hood. Did it again, same thing. What could this be? My only mod is a Hot air intake. Sounded like a backfire but i dont know what could cause this. 2004 SXT 5-speed 5,200 miles. Fresh oil.

 

usually if it was a backfire, it indicates that you are running rich. Do you have any codes?

 

if it happens frequently, I wouldn't bother trying to analyze it, take it to the dealer, it is still under warranty, make them look at it.

 

Yea it's still under warranty. No I checked and there's no codes. How do you fix it if it's running rich? It's bothering me now. It's only when I hot rod it though. Thanx ahead of time.

 

When exactly does it do it? As you are slowing down maybe with your foot off the gas? Mines got like a rumble when I slow down now that I got a different exhaust. The stock muffler used to drown it out...but this one does not.

 

take it to the dealer, its under warenty and demand that they fix it.

 

Like when I take it to the track and really get on it from 1st to second theres deffinately a pop under the hood. It shakes the car and gets un-nerving. I ran a 16.0 flat with just the intake and r/t muffler so I dont think it's hurting anything. Or not that i can tell. But I deffinately want to find out what it is.

 

I woudnt race a new sxt with warrenty they got ways to find out if its your fault they will void your warrenty thats why im not doin anything with the engine and exhaust is to do with the engine your rt exhaust isnt at fault maybe your intake something to do with it. hope you find it. Im pretty gentle to mine

 

Try reseting the PCM and see if it still does it after. Disconnect the neg battery terminal for a half hour or so.

 

When I first put on my intake I got some serious backfires during hard shifts especially downshift with quick snap of the throttle, but when I changed my exhaust (flowmaster 80 series welded on) all I get is the little backpressure gurgle that you get from all flowmasters