Originally Posted by maxwell18
Would the computer throw a code if the engine and transmissions were not obtaining the RPMs that is programed into the system at WOT?
If you are having a problem reaching the RPM it could mean that you need to calibrate your accelerator. I will past a link I copped a few yrs back.
At the Spartan Rally, two people complained that they had better acceleration with the cruise control than with the
accelerator pedal. In the Cummins round table discussiion, one of the Cummins' engineers reported that he found that on
some coaches, the accelerator pedals weren't calibrated properly when he put cumputer hookups on the units to check them."
"He explained that the accelerator pedal acts like a potentiometer to tell the Cummins and Allison electronics what's going
on. If normally the pedal reflects a 0 to 100 scale, an out of calibration pedal could, for example, only reflect a 0 to 60
scale reducing engine performance."
"He recommended that everybody calibrate their accelerator pedals. If the pedal is already calibrated, it won't make any
difference -- but for the few units that aren't calibrated, it could make a big difference."
Turn the key on to the first position (power on, but NOT starting the engine). You don't have to wait for the meters to
cycle, etc.. Slowly, but steadily push the accelerator pedal to the full acceleration position (pedal to the metal!) and
then release it with a slow, steady motion (do not let off it quickly). Repeat this porcedure a total of THREE times. Then,
turn the key to the OFF position. Leave the key off for a MINIMUM of 30 seconds -- longer is okay, shorter is not.
The electronic modules in the engine and transmission will then recognize this as a calibreation procedure.
The above was at a Spartan/Cummins rally. I don't know if it would apply to your coach. But if you have a Cummins/Allison,
I don't see why it wouldn't apply.
My DSDP ISC 350 runs fine, always has. I tried this procedure on mine and it didn't do anything one way or the other; point
being, to do the procedure may help but it