i have a 2000 off-road edition with a 318. it has shorty headers,no cat,10 series flowmaster duals,50mm throttle body,sct set on 93,3923s,taylor thundervolt wires and accel cap and rotor,CAI. it has 315/70/17 with 4.10 gears. with 65k and it has NO POWER at all.it well barely pull itself down the road. u guys know what could be wrong? no check engine lights. i know 35 and 4.10s are not that good but still it should have more power then it does. please help

 

Unplug your pre-cat O2 sensor, take the truck for a ride, see if it is any better.

have you fixed your plenum yet?

 

Unplugging the sensor puts the truck permanently into open loop mode, so, it just runs off of tables. If it runs better.... replace the O2, it is lying to the PCM.

 

yea i forgot to add hughes plenum plate and new double roller timing chain. what would unplugin the pre-cat 02 do?

 

it dont have power becuase you took off the cat, i lost alot of low end when i did it to mine. also you prob have the death flash get a sct tuner and it will unlock new found power and you will love the truck. i have 2000 ram also and it made a world of diffrence !

 

alright ill try that tomm. i already have the sct. i dont think i lost any power with the no cat im running 2.5 from the y-pipe then its spilt into two 2.25 pipes

 

you've got all the basics - SCT, tune up, plenum, no cat, timing chain, gears, TB, headers. it should run like a rabbit.


check your compression.
replace TPS just to be doing. keep your old one as a spare.

 

but with 60k highly boubt that it has low compression but i could be wrong and i dont really want to replace stuff without knowing that its bad

 

Got a volt/ohm meter? Preferably analog? (as opposed to digital....) You can test the TPS. If it was lying, that would explain a lot.

 

i have a digital one ill proble the wires tomm if i get the chance. so the tps or 02 would cause a lost in power?