so i just crossed off UDPs for the mod list for my car about a week ago. the first ride was pretty sweet i felt a good amount of differece. the last couple of days though ive noticed the car is having a rough idle. i feel a slight missfire, my mpg had been going down. some of the same sypmtoms i had when my spark plugs took a crap on me, but the cel hasnt put out any misfire codes. my question is can putting too many mods on car WITH OUT a coustom tune/tunner hurt the car ? i know with out a coustom tune the mods wont reach full potential, but how bad will it affect the car. can all these mods be too out of sync with each other that it affects performance? i was planning on waiting till after i did the windstar kit to get a tunner but im thinking twice about it now. all input is appreciated thx


btw here my mod list: bbk cai, asp UDP 25%, mac lts with H pipe, weld in magnaflow cats, super 44s flows, motive 3.73s, detroit trutrac lsd, and ram hdx clutch and iacv mod if that matters

 

With the mods you have listed I dont see it being a big problem without a tune. The only thing that might those a problem into your path is the LT's. But normally a tune is needed for things like a Cam, intakes, FI, or something alittle more involved then what you have.

Matthew

 

iac mod, undo it, see if that corrects the issue

 

Awe man, and after I revived the thread. :P

If that doesnt help you might want to think about your metal matrix cats possibly going bad, maybe O2 sensors failing, clogging fuel filter and so on.