RPM fluctuates on freeway
#21
08-17-2013, 03:02 PM
Join Date: Aug 2013
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Great now it turned into a tcc discussion when its clearly all the symptoms of a a bad Throttle Position Sensor...there was a thread a week ago addressing this. I'm not trying to bust anyones ***** by being like this, but probability, symptoms & being the cheapest thing to fix first, all things point at the throttle position sensor as the issue to fix with about 99% confidence I can say this.
If you're on the highway and your torque converter lockup unlocks it will go higher than a measly 200rpm fluctuation because its trying to build torque rather than staying static at the 1 to 1 ratio with the transmission input, you'd be looking at least 500-600rpm difference if it were an actual tcc problem...whatever the difference is in the tach when you start out in first gear from idle to the truck moving, that's your unlock point reference baseline.
$35 TPS will cure it.
Example of a bad tps in this video...the guys description also said he fixed it by buying a new TPS.
Dodge Durango Idle Reving Problem - YouTube
If you're on the highway and your torque converter lockup unlocks it will go higher than a measly 200rpm fluctuation because its trying to build torque rather than staying static at the 1 to 1 ratio with the transmission input, you'd be looking at least 500-600rpm difference if it were an actual tcc problem...whatever the difference is in the tach when you start out in first gear from idle to the truck moving, that's your unlock point reference baseline.
$35 TPS will cure it.
Example of a bad tps in this video...the guys description also said he fixed it by buying a new TPS.
Dodge Durango Idle Reving Problem - YouTube
#22
08-17-2013, 03:06 PM
Solenoid either works, or it doesn't. Control circuit might have some dirty contacts, or rubbed thru wire, but, that's about it.
Brake switch will also disengage TCC. If it is marginal, or not quite adjusted right, vibration might be enough to convince the PCM you are stepping on the brake.....
Brake switch will also disengage TCC. If it is marginal, or not quite adjusted right, vibration might be enough to convince the PCM you are stepping on the brake.....