so i have a new to me 2003 limited liberty with 152,000 miles on it. my 2006 was totaled so i have been in the process of changing fluids and sensors on the 03 to get it where it needs to be.
with that said i have so far changed the cam and crank sensor, the air mixture sensor in the top of the intake and changed the oil. this weekend ill do the axle fluids, transfer case and transmission. i will also change as much as i can the PS fluid and the brake fluid as well as bleed the brakes. also still need to put in the new iac and tp sensors.
so far it runs pretty good but there are a few small things i have questions about. when it idles it is smoother than it was before i changed out the crank and cam sensors, HOWEVER it still doesnt idle correct about 45% of the time. it seems to wonder around between 400-800 rpm when sitting. it revs a little too high when its first cranked, but settles down to either a perfect idle OR the erratic one i just described. im hoping this weekends iac and tp sensor change as well as a complete TB cleaning will fix this. am i right in assuming this is the most likely cause of the idle?
also the transmission im pretty sure has never had the fluid or screen/filter changed. it is the better 45rle version. it changes ok but isnt as smooth as my 06 which i kept in perfect condition. im hoping changing the fluids and screen/filter will also fix this kinda rough gear changing. it has done 2 things so far that i dont like.
1. sometimes when it hits 4th and i settle down to my usual 70mph drive itll either run perfect, or itll seem to stick between a 3rd and 4th gear rpm if that makes sense. sometimes itll turn 2200rpm at 70 mph on flat ground, yet other times itll turn about 2500rpm running the same 70mph on flat ground. are there any solenoids on the trans that i may need to change? or is this also likely to be from never changed fluids?
2. sometimes itll downshift from overdrive to 3rd just fine, yet sometimes it wont downshift no matter how much pedal i give it. any ideas on the cause?
with that said i have so far changed the cam and crank sensor, the air mixture sensor in the top of the intake and changed the oil. this weekend ill do the axle fluids, transfer case and transmission. i will also change as much as i can the PS fluid and the brake fluid as well as bleed the brakes. also still need to put in the new iac and tp sensors.
so far it runs pretty good but there are a few small things i have questions about. when it idles it is smoother than it was before i changed out the crank and cam sensors, HOWEVER it still doesnt idle correct about 45% of the time. it seems to wonder around between 400-800 rpm when sitting. it revs a little too high when its first cranked, but settles down to either a perfect idle OR the erratic one i just described. im hoping this weekends iac and tp sensor change as well as a complete TB cleaning will fix this. am i right in assuming this is the most likely cause of the idle?
also the transmission im pretty sure has never had the fluid or screen/filter changed. it is the better 45rle version. it changes ok but isnt as smooth as my 06 which i kept in perfect condition. im hoping changing the fluids and screen/filter will also fix this kinda rough gear changing. it has done 2 things so far that i dont like.
1. sometimes when it hits 4th and i settle down to my usual 70mph drive itll either run perfect, or itll seem to stick between a 3rd and 4th gear rpm if that makes sense. sometimes itll turn 2200rpm at 70 mph on flat ground, yet other times itll turn about 2500rpm running the same 70mph on flat ground. are there any solenoids on the trans that i may need to change? or is this also likely to be from never changed fluids?
2. sometimes itll downshift from overdrive to 3rd just fine, yet sometimes it wont downshift no matter how much pedal i give it. any ideas on the cause?
