Well, I have to be honest with you. I was so happy to finally get GT4, that I had to go out and buy myself the DFP. After spending a weekend building/painting a make-shift cockpit out of particle-board( mdf-board ), I was all settled in for some racing.
It took a few laps to get used to the DFP( which I have owned for all of 1 week now ). But soon, I was turning some good laps with a '91 Toyota Celica at Laguna Seca in Arcade Time Trial mode( 1:57's )
While running my laps, I noticed the Gas pedal was periodically losing the input of my foot, much like is described in the tippy-top of this thread. I would be crusing down a straight-away... pedal floored, and all of a sudden... nada, zero, zilch input registering on the pedal. I would have to let off the pedal, and then re-apply pressure before it would register.
After discovering this thread, I mulled over taking apart the pedals to attempt a repair. Heck, the entire wheel is only a week old. So I called Logitech customer support( figuring they would stand-up, and send me a new wheel when I described my problem ). Much like GT Jud experienced earlier... Logitech told me that I needed to have another game to verify the wheel was the problem, and not GT4. I told them: "This is your wheel, and it is specifically designed/marketed for GT4... how could it be a problem with the game?". The CSR just kept re-iterating that in order for him to do his job, he needed to verify that the problem existed in a different game. But I don't have a different driving game for the PS2! I told him that it was freakin' insane that I was going to have to buy/rent another game just to help him diagnose the issue. I finally told him to go pound-sand, and that I was going to return the wheel to Amazon.com for a refund.
But I WANT THIS WHEEL! It's so good... and makes the game 50x more enjoyable( IMHO ). So I decided to take the plunge, and open up the pedals tonight. Thanks to all who posted... I did exactly as was suggested. I secured the wires leading from the pedals to the pots, using two strips of electrical tape( criss-crossed at the "pinch-mark" that I chose ). By applying the tape, you are simply isolating the "pots" side of the tape-wire-pots section from any movement registering on the tape-wire-pedals section. Think of it like pressing down on a guitar string to generate a different sound. By "pinching" the guitar string, you isolate the string above your finger( with respect to the guitar's neck ) from any movement incurred below your finger( with respect to the guitar's neck ). Maybe its not the best simile, but it works for me
Anyway, after securing the wires to the base of the pedal housing, I reset all the springs( one for the gas pedal, and two for the brake ). Oddly enough, the brake pedals secondary spring( it's the black spring on my set ), was not properly seated within the pedal assembly. Consequently, before I opened the pedals to fix the wire issues, my brake pedals was waaaaaaay-to-twitchy. I could barely derpess the pedal 25% before GT4 registered it as matted-to-the-floor. Once I re-seated the secondary spring in the pedal assembly, it was like magic.
So, I ensured the springs were seated, cocked, and ready to go. I double-checked my "tape-job" on the wiring mechanism... and then proceeded to put back the pedals with the screw( 9 I believe ).
When I fired up GT4, it was awesome! I ran over 35 laps at Laguna Seca during 2 sepearate instances. I never had one "hic-cup" in the gas pedal, and for the first time... had full travel in my brake pedal.
This is how it should feel for everyone. The wheel is very good with the game, but like others have stated above... Logitech's decisions on the pedal assembly could have been better. But it's a simple fix. The hardest part was re-assembling the pedal base( with the screws ), and that wasn't really tough... it just takes some patience to line up the springs in their asssigned plastic grooves.
It really wasn't a big deal, and I do feel like it is a solution that will last( whereas simply trading in one wheel for another might just have the problem re-appear on another set of pedals ).
Thanks to all, I hope that my posting gives some people confidence to do-it-yourself. We all wish Logitech would have done a better job in the first place, but with a simple fix( 20 minutes - tops )... you can be off and racing.
Good Luck Everyone... Enjoy the Game( and Wheel ).
BTW - I just turned in a hot-lap/time-attack at Laguna Seca( with that old '91 Toyota Celica ) at 1:47.xx. That's 10 seconds better than during my first DFP experience. Way Cool!