I have a 1999 Dodge Ram 1500 4X4 Extended Cab. I have 35" Tires with 15" rims. I have a Full Flowmaster American Thunde Dual Exhaust System and an Air Raid Intake System. This truck is a 5.2 Liter. My question is this truck has no power at all. It boggs down as soon as I stump on it. Why??? I have a 6X12 Enclosed Race trailer for my ATV that I race and it seems like it is all the truck has to pull it. The trailer and everything in it doesnt weight more than 2000lbs if even close. Is it the motor,big tires tranny or what. I know its hard to determine but this truck should pull my trailer like its not even there and it dont. Since I have a flowmaster system and an air raid intake should anything be done to my motor or fuel flow such as needing more gas or what not. I dont know where to start i have had it in several shops in my area and they all seem to be dumb founded. I need help please. Thanks...

 

this isnt a recent picture i have made some changes..but this is it

 

Nice truck. What sort of gears are in it.I would use a tach to see what the RPMs are doing.

 

i dont know if that would be it or not

 

The first thing I'd do is a fuel pressure/Volume test. If that's OK load up the trailer & remove the upstream o2 sensors & go around the block WITH the trailer...
If It's got more power you've got a blocked cat conv.!!

 

was it o.k before and after you put the tires on?is this something that just started happening?if it started being a dog after the rims and tires i would say you need a gear change.with 35"tires i would go with 4.56 gears.