so my trucks rpms started to surge as im driving. i can be doing 75mph down the hwy and the whole time the rpms go up and down and so does the engine. i changed the tps last year. i havent cleaned the iac sensor in a while. any ideas. oh 02 ram 2500 5.9 gas

 

IAC only works at idle, I'd blame a cheap TPS. Try an new one from a shop with a liberal return policy.

 

is it changing alot

 

the rpms will jump roughly 500 rpm. its very faint but i noticed it cuz i could hear it in the motor. its acting like im repeatedly pressing the gas down at a slow steady pace.

 

its either overdrive kicking in/out for 500 rpm's or the torque converter locking/unlocking for about 300 rpm's. TPS could be causing it. or it could be the transmission, possibly the TV adjustment, montec will know.

mine did that when i first bought it a couple years ago and a new TPS fixed it.

 

mine did that also it was torque convertor lock up solenoid and pressure transducer solenoid replaced and fixed it

 

are these solenoids internal or external were can i get them. and do you remember how much they were. sorry im just trying to figure this all out

 

there internal heres what i replaced converter #R4736591AC $229.00 /front pump #r4796469AD $158.00 /torque converter lock up solenoid #4617210 $113.00 /transducer solenoid #56041403AA $93.45 /presure tranducer solenoid #52118500 $90.05 tax out the door $742.39 all from chrysler if you don't want to do all of this as i recomend you do just replaced all the solenoids together as they are right by each other no need to do it twice and you might want to check you 2-3 shift spring as they are known to be broken i so go to patcperformancetransmissions.com for the shift spring

 

guess ill be bringing it to the tranny guy. it was rebuilt less then 15k miles ago. so ill make it his problem. thanks