Cruise Control Components

[HalM]

When I bought my '99 last summer, the cruise control was not working. The previous owner said that he had had this checked and the issue traced to a component attached to the gas pedal. Using SEARCH, I have not found anything that references a similar component. Is there a C/C diagram anywhere so I can look up said part?

[logray]

#24 in the diagram perhaps?

http://www.autoatlanta.com/porsche-parts/996-99-05/403-05.php

P/N 99661702104

Here's a used one for $325. http://dcauto.gotdns...get=99661702104

edit: good call Loren, the above is for a cable operated C2... (C4 different part).

Edited December 11, 2011 by logray

[Loren]

When I bought my '99 last summer, the cruise control was not working. The previous owner said that he had had this checked and the issue traced to a component attached to the gas pedal. Using SEARCH, I have not found anything that references a similar component. Is there a C/C diagram anywhere so I can look up said part?

C2 or C4?

C2 is a traditional accelerator cable. C4 is eGas.

Two very different systems.

[HalM]

C2. Thanks everyone. This is exactly as the PO described. . . Except for the "new" price!

[Loren]

I would put a PST2 or PIWIS on the car before you spend that kind of money.

Either tester can tell you whether it is the pedal assembly ($314) or the control unit ($1099).

[HalM]

Excellent suggestion. Will do. Thanks again.

[Nehmaiz]

03 C4S manual with Cruise control - 112,000 KM

Just had my clutch and flywheel replaced, and when i tool the car back the reverse sensor and reverse lights were not working. so they replaced the reverse switch on the gearbox and now that's working fine, but the cruise control has suddenly died out!

i always use my cruise control on the highways here as they are full of cameras, and the system was working perfectly before i sent my car for repair.

could the clutch job or the reverse sensor have any effect on the cruise control system?? i don't want to pay more money if it's the shop's fault!

Thanks in advance.

Nehme

[Richard Hamilton]

The reversing light switch would not affect the cruise. I would start by checking the fuse, then the clutch pedal switch, and the brake light switch. If you know someone with a Porsche Tester, the switches can be checked easily.

[HalM]

Following Loren's earlier suggestion, I had my mechanic check out the system with a PST2. Their diagnosis was that my removal of the clutch helper spring was not allowing the clutch pedal to return to the proper position to engage the clutch pedal switch. We are doing to move forward later this winter with replacing helper spring (wife wants that done, regardless) and see it that does, in fact, fix my issue.

[HalM]

Well, a new clutch helper spring was installed today at the stealership. Total $116. I really like the way it feels now. Be that as it may, still no joy with the cruise control.

[HalM]

Final installment for anyone searching with the same issues.

It turns out that both diagnosis (clutch helper spring and P/N 99661702104) were wrong. It was the clutch and brake pedal switches.

In hind sight, these parts are so cheap that I should have done them myself as preventive maintenance.

Hope this helps.

[logray]

Thanks for the follow up!