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About dlynnn22

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  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    1997 Porsche 993 TT
  1. There are only 22k mi on the car and the plugs look okay per dealer.
  2. There are only 22k mi on the car and the plugs look okay per dealer.
  3. I have 1997 993TT. In 4th gear and above with the peddle to the floor at 4K RPM the turbo spools up to .8 bar, there is a sudden sputter and hesitation at 4,200 RPM. Some poppiong can be heard from the rear and the RPM will not climb any higher untill I let off the accelorator. There was a fault in the mass air meter, it was relaced; no help. New, stronger pop off valves were installed, no help. It was discovered the previous owner installed a V-Chip. An authorized V-Chip rep reconfigured the fuel-air mixture and the turbo settings. This helped for a short time. However, after letting the car sit in the garage for a couple months the problem resumed and to a greater degree. After throwing good money after bad, the porsche dealer could not correct the problem. There is an adjustable fuel pressure regulator in the car. The V-Chip representative does not think it is a fuel problem due to the O2 readings. Could this be a wastegate issue? I do not have access to a 4x4 dyno to fully diagnose. Does anyone have any suggestions?
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