jim010

Thought I would post what I found on another thread.

My 05 GT has a lag in the pedal. From a stop and at idle, when I press the pedal slowly there is no response for say the 1st inch of travel and then the throttle responds with a surge. I had gotten used to it, but then I came across this:

http://mustangforums.com/forum/2005-...st-see-52.html

A lot of info here, but Tube suggests taking the wires in the pedal and straightening them a bit. Quite a few who say that this fixes the issue.

But in the last couple of pages, there are those who discovered that the plastic cover plate that has the circuit board that the wires come into contact with has a fair bit of play when attached to the pedal. I can attest to this as well. Loosen the screws and then push the plate forward as far as it will go and then tighten again. This has the same effect as bending the wire brushes.

Also suggested was:

Reset:
With the vehicle at a complete stop, set the parking brake.
Put the gearshift in neutral, turn off all accessories.
Turn on car without starting the engine.
Wait till the dash lights stabilize (some of them will turn off)
Step on the gas pedal in one smooth and steady motion
Once gas pedal hits the bottom, let go.
Turn off car and wait 4-5 seconds.
Turn on the engine.


Recalibrating the gas pedal and throttle body:
1- Turn the ignition to ON without starting the engine(dashboard lights come on and chime sounds).
2- After the chime stops, smoothly depress the gas pedal to the floor while counting 1001-1002-1003.
3- Release the gas pedal using the same procedure in 2.
4- Wait 6 seconds, and turn the ignition to OFF.
5- Wait 6 sec., and repeat steps 1-4 two more times.
You can here ticking when you do it and then the engine light blinks when your done.

I haven't tried any of this yet, though. Has anyone done any of this?

houtex

The procedure I did was:

1) Ignition on.
2) Wait for lights to stabilize.
3) Press down pedal to floorboard, bottoming before 5 seconds is up.
4) Release pedal.
5) Start car.

The lag went away. Also, I do this every time I clean the throttle body, to which I pull the battery negative cable during that time to reset the computer's learned info regarding the unclean throttle body. First time I didn't do the battery pull, and put the cleaned throttle body on, the car ran like absolute *crap*. Pulled, waited 20 minutes, started it back up, like magic.

Anyway. Yes, it works. Your pedal/situation may vary, of course.

mustangfan410

I've heard of this and done this but I never felt a difference.

houtex

I can't say it'll work for everyone, I just know it worked for me. Sometimes the pedal needs replacing, or reworking. For example, there used to be something 'round the 'net regarding taking it apart and gently bending the fingers in the pedal sweepers so they get better contact, and that solved some people's issues with the early S197s.

But I can assure you, I had a serious dead pedal lag issue, not movin' the RPMs until quite a bit in, and then overrevving, as Jim described above. Did this, and problem solved, for me, anyway.

jim010

Yeah, in my first post I mentioned that, but I like taking the plastic cover plate and adjusting that as a better solution.

07 Boss

Don't have to open up the cover and bend ****. Mush easier way to do this. A little shim on the pedal arm where it enters the assembly. I first used some foam tape to see if it would work and then swapped to some lead tape for a more permanent fix.3









You only need to shim it a little bit as any position change up there translates into a bigger change in pedal position. It's a much easier and fool proof way to do it.

houtex

That's a great idea!

Forest, trees... trees, forest.

So simple, and I'm surprised it wasn't a well known thing. Thanks!