ezab

220 hp? I always thought it was between 180 and 190.

giwill

i did use most of the sensor off my old motor and did not change the flex plate from my old motor

TheJerm

renix motors where ~170, all HO motors are rated at 190hp at the crank and decreased some in 99 or 00

I believe you need to use the flex from your original motor, not 100% sure tho

freegdr

jeephorizons.com/tech/xjstockspecs.htmlhttp:// go here click on tech and youll find were iim getting the fact

ezab

I think he means torque.

freegdr

yes torque im eating a fat juicy cheesburger while reading i had to mant thing to focus on and the burger won

freegdr

the point im trying to get across is there is a cam shaft difference in the two motors maybe the dist or the crank sensor need to be used from the new motor dont no if the fltwheels are different ?

freegdr

im thinking more torque the valves might be staing open alittle longer the old fly wheel may not be ksending a long enough signal to the in jectors to stay open applying more fuel . iwould check and see if both motors take the same crank sensor .sync sensor and torque convertor or ring gear to make sure the signals are on the same page

TheJerm

oh that makes more sense if you mean torque. The only real changes in the motors where the cams (not "that" big of a deal), head design and the ecu

freegdr

more torque means more fuel maybe the old sensors dont give it enough fuel like retarding the timing

TheJerm

couldnt the wrong flex plate be a root cause to this? A good way to confirm to to take your original flex plate to the junkyard and compare it to the same yr/generation motor you have in there.

I have a feeling they changed the flex plate from renix era to HO yrs.

Do you have any check engine light? tested the fuel pressure? Which distributor your using and sensor?

ezab

I just looked it up and they are different. Wonder if he swapped them before he put it in.

TheJerm

he said he didnt and this is his problem

ezab

Does anyone else think that Chrysler has the dumbest design for Flexplates and CPS?

freegdr

wher did you find it i found onlt a renix and an ho