2001 ram 1500 5.9 4x4 sport all stock but k&n air filter and flowmaster. 235 tires. 130k miles well taken care of / never been off road.

to me it seem to have lack of power starting from a dead stop. I can push the gas all the way to the floor and u can hear the motor open up but it slowly takes off. I can even spin a tire on rain days. And hand doing mpg its doing around 10mpg hwy. Is that bad? Just had full tune up.

 

Yep, that's bad.

Hows the plenum? How old are the O2 sensors? Cat plugged up? (sure sounds like it)

You should be able to do about 16 or better on the highway. My 3/4 ton can sometimes hit 18.....

Check the plenum, if it's bad, fix it. Replace O2 sensors, and check the cat. Timing chain and gears while you are doing the plenum wouldn't be a bad idea either, that was the one thing that made the most difference on my truck.

 

How do I check the plenum? And what is it?

 

You have to put a stick up your hiney, and twirl on it first.

Edit: Aren't you supposed to be at work? LOLOL

 

Hahaha. 4th time in a month I have NO materials. Bone head boss(stepfather). But he has nothing to do with "how do I check the plenum", and he doesn't know what it is? Please help.

 

I know what it is. There seems to be very little oil inside the intake more like a film. I been thinking of cutting my cat out but what is the pros and cons of running no cat.

 

Depends on emissions laws where you live. If the cat is getting plugged, you will notice immediate gains.... (oddly enough). Might set a catalyst efficiency code, but, that is easily dealt with. (non fouler write up in the faq section.) The y pipe is what you REALLY want to do something about.

 

Ok its getting cut out. what so bad about the y pipe

 

Huge restriction where the two pipes blend into one. They simply crushed the 2" pipes down enough so two of them would fit into the 2.5 inch pipe leading to the cat..... Not really a good plan.

 

Well soming happen with my lack of power. I hit the gas to s some people and the gas pedal seem brake and the power was back but not shifting right. So I look for what happen and my passing cable poped off. Why the lack of power with it on