[crazytigerfan69]

My 89 dodge aries has been missfiring lately so i cleared all the old codes and ran it today for awhile and the code that i got was code 34 speed control problem, but i have no idea what component to change or troubleshoot. any help is appreciated. thanks

 

[Jmw132001]

more and likely it would be the speed sensor i would say. i am not positive on that though. hopefully somebody else will chime in. good luck

 

[crazytigerfan69]

i just don't see how that would affect the engine when it's in park and idling. i thought the speed sensor detected the speed for the speedometer?

 

[Speed Dragon]

It does, but the computer also reads it and does some calculations from it. Most commonly they tend to want to surge at idle, or stall when you come up to a light or stop sign. Code 34 is for the cruise though, not the speed sensor.

http://minimopar.knizefamily.net/fault/code34.html

Not sure how that would affect running though. Have you tuned it up recently? What kind of misfiring?