Rough idle, barely runs 94 6.5td
#13
Alright so I let the truck sit and think about what it's done the past couple days. I went out and let it run for a bit. Rechecked codes and now I'm getting code 34 stepper motor fault and 91-98 cylinder misfire. I'm confused because the other day I had a crank sensor error and others too. Can the stepper motor cause a cylinder misfire on all cylinders?
#14
Here's my "somewhat" educated "guess":
Your timing is still out and why the truck runs like crap.
The PCM is trying to adjust the timing with what it has at it's disposal; The stepper motor.
But the stepper motor doesn't have enough authority since you are so far out on the intital pump timing.
The PCM then thinks the stepper motor isn't working correctly because it isn't doing what is being commanded.
Hence, the PCM is setting code 34; Stepper motor fault.
And now we're right back to the need for you to adjust your pump and set TDCO....
Your timing is still out and why the truck runs like crap.
The PCM is trying to adjust the timing with what it has at it's disposal; The stepper motor.
But the stepper motor doesn't have enough authority since you are so far out on the intital pump timing.
The PCM then thinks the stepper motor isn't working correctly because it isn't doing what is being commanded.
Hence, the PCM is setting code 34; Stepper motor fault.
And now we're right back to the need for you to adjust your pump and set TDCO....
Last edited by great white; 03-14-2012 at 02:23 PM.
#16
Everything you have brought up here points to an incorrectly timed pump.
I could be something else, but not as likely as pump timing.
Your time, your dime, your call....
#18
thats probably what im gonna try to do today if the local shops dont want some aborbant amount of money to hook up a scanner.
update: only one shop within an hour and they want $179 just to hook their scanner up to it. i think ill pass. think anyone on here might have one and live in virginia/northcarolina area
update: only one shop within an hour and they want $179 just to hook their scanner up to it. i think ill pass. think anyone on here might have one and live in virginia/northcarolina area
Last edited by muderxtreme; 03-15-2012 at 09:14 AM.
#19
thats probably what im gonna try to do today if the local shops dont want some aborbant amount of money to hook up a scanner.
update: only one shop within an hour and they want $179 just to hook their scanner up to it. i think ill pass. think anyone on here might have one and live in virginia/northcarolina area
update: only one shop within an hour and they want $179 just to hook their scanner up to it. i think ill pass. think anyone on here might have one and live in virginia/northcarolina area
You can buy a program called "car code" for around 60 bucks that will do it for your truck.