Electronic throttle FCCC

[wmpbauer]

Does anyone else have acceleration issues with 40' 2011 Phaeton on a FCCC?

There is a REMARKABLE and DRAMATIC difference when using my foot throttle (horrible) or just reengaging the cruise control (excellent).

I read somewhere that FCCC foot feed sensor units often lose programming and have to be "re-flashed".

Comments??

[powerboatr]

can you be a bit more specific?
my f/l chassis if i have to dis-engage cruise by using my brake pedal because of traffic lets say, then push resume it will go like a scalded cat to try to catch back up the lost mph.
if i use the throttle pedal it doesn't pour on the coals, unless i go to the floor, which is what the cruise does by virtue of the programing, since it now is trying to get back to where you had it set in an expeditious manner

but I don't think the floor pedal potentiometer looses its "programming"
its not a programmable item. Its just a potentiometer and it causes change in electrical signal (voltage) based on how much the arm is turned

[Lault]

No issues here with my 2011 with 9,000 miles. Runs as it should.

[wmpbauer]

Quote:

Originally Posted by powerboatr can you be a bit more specific? my f/l chassis if i have to dis-engage cruise by using my brake pedal because of traffic lets say, then push resume it will go like a scalded cat to try to catch back up the lost mph. if i use the throttle pedal it doesn't pour on the coals, unless i go to the floor, which is what the cruise does by virtue of the programing, since it now is trying to get back to where you had it set in an expeditious manner but I don't think the floor pedal potentiometer looses its "programming" its not a programmable item. Its just a potentiometer and it causes change in electrical signal (voltage) based on how much the arm is turned

What you've described is also what happens with my coach. The difference between acceleration with the foot throttle and cruise is remarkable.

[Skip426]

I don't think that this condition; better acceleration on resume; is limited to newer model coaches. It is more likely that the ECM , engine control module, can deal more quickly to bring the engine RPM and trans gears back up to cruise set speed; while avoiding turbo over-boost & over fueling the engine; than re-calculating all the fuel/gear/boost based on new input from the TPS.
My 99, 3126B Cat, pulls like it has 25% more power on cruise, and many new Highway Rigs will only develop full torque/horsepower, in high gear with the cruise on. Easier on the drive-line that way.

[Hooligan]

Your throttle response may be normal --

There is a procedure to calibrate the electronic accelerator pedal. . It applies to my chassis with the ISB engine but I don't know if it is the same for your engine. Check with Freightliner.

"7. To calibrate the accelerator pedal assembly:
The ECM and accelerator pedal must be calibrated when an accelerator pedal is initially installed, when an accelerator pedal is replaced, when a new calibration is downloaded to the ECM, and when the accelerator pedal wiring has been disconnected while the vehicle ignition switch is ON.
To recalibrate the ECM and accelerator pedal, the ignition switch must be in the ON position and then the accelerator pedal must be slowly and fully depressed from idle to full throttle. Repeat the procedure three times.
Procedure complete. " (engine NOT running)



Hope this helps.