hi guys, i have a 03 ram 2500 with nv4500 stick tranny n here is my mods, magnaflow dual, gutted cat, pulstar irridium spark plugs, taylor 10mm wire set, 180 thermostat and superchips 3865, tried 87, tow and 91 tune, my truck have no low end and my mpg as drop from regular 11/13mpg to 9/10mpg, what e my doing wrong???, u guys have any ideas??, improvements to do??? let me know guy's!!!

 

anybody???

 

You are probably going to have to wait more than 2 minutes. Hemi's perform best with champion coppers. Might want to start there. Other than that, you'll have to wait for the pro's to chime in.

 

i was going to say the same, ditch the spark plugs and put in champions, sometimes you have to wait a while after putting the tune in for the truck to actually respond to it. How long ago did you tune it?

 

I wait like one or two gas fill before doing anything , the spark are the irridium ones, they suppose to work right?, I know HEMI dont like platinum ones, also have some exhaust drone over 3k, I think is because I gutted the cat, some people said to have a new magnaflow y pipe if u gut the cat.
Any more ideas?, also I'm taking u guys in with the spark plugs, how about ngk v-power copper?

 

Hemis like copper plugs. I used NGK 5306s in my two Hemis. A Sea Foam treatment can't hurt. How many miles?

 

120k miles, I also change the pcv n clean the tb, maybe a need a Cai?, will seafoam kill the new plugs if a tried?.

 

U guys have any other ideas other than plugs?, also have a lot of exhaust drone after 3k or if I floor it.,I hear about replace the stock y pipe for a magnaflow y pipe, but I dont know what size I need.

 

A CAI will have little to no effect. Sea Foam won't hurt the plugs - I've used it on all my vehicles. What size tires?

 

I have the original ones, even my hwy mpg went from 16.7 to 13, something is not right , u think the plugs can do something like that drop?,Thx for replying.
All the mods, tune up n the cleaning I did the same day, I dont remember doing anything bad.