If the switch is like most on pedals it will be a screw in. Try adjusting how far it is screwed in with the lock nut if it is the common variety.

 

Great to hear your starting problem is solved.

 

Wasn't a screw adjustment, rather just bent the "blade" out a bit. No problems since!
DC4

 

DaveCarrera4; you still around?

Did this result in a permanent fix? I'm having the same issue. I'll take a look at the sensor to see how to bend it.

Anyone else?

 

A question to Macster. Are these the switches that are the same exactly, One operated by the brake pedal and the other by the clutch pedal? Doesn't either when depressing take out the cruise control if engaged when driving? If so, could they be interchaged to make a test on the starting problem?

 

The pedal fully released switches are the same for brake and clutch. #17 in the diagram below (click link).

http://www.autoatlanta.com/porsche-p...-05/702-00.php

The pedal fully depressed are different for brake and clutch. #16 for the clutch. The pedal pushes the metal tab in, closes the circuit, and allows the engine to start. Some people tie wrap this switch allowing clutchless starting. However DO be careful, the transmission MUST always be in neutral if you do this hack. Even one mistake can cause damage. To eliminate #16 switch you can unplug the two wire connector from it, and jumper the leads (put a wire in between the two contacts). If the car starts every time then that is your problem.

 

I have the same problem with my 2002 C4S stick shift. I changed the clutch switch and the ignition lock switch. Still not cranking all the time. In addition I now have a airbag warning light that stays on and a red blinking light from the radio when the car is running. Any other suggestions?

 

I installed a new starter and battery. Still won't start. Only get a clicking noise from the rear. Airbag light still comes on. What else could there be wrong?

 

The clicking noise is the starter solenoid kicking in...the problem is you're not getting enough voltage/amps to turn over the starter. Clean all connections including the ground straps, substitute a different battery, try to jump it with the connectors in the engine bay. If that works, you've got a loose 12V connector to the starter somewhere.

 

Thank you. Does this mean the ignition switch must be ok if I can hear the solenoid kicking in? The battery is brand new.

 

Yes...if the solenoid is clicking the ignition switch is more than likely not at fault. Two circuits go to the starter, think of it this way - you turn the ignition switch, it activates the solenoid, the solenoid acts like a great big switch that throws the main 12V amperage at the starter which then engages and turns over the engine. The little tiny wires from the ignition switch work the solenoid switch on the starter. The great big wires (like battery cable size) are what work the starter.

 

11.90 V at the starter from the battery. Jumping it with my truck did not do it. It turns over when I bridge the two big connectors but it did not when I connected a jumper cable to the terminal coming from the battery (left connector).

 

I did not bridge the two big terminals. The starter turns over when I put power on the smaller terminal.

 

I checked the '99 circuit diagram and there is a relay called "Start Lock relay" which is between the ignition switch and the starter solenoid. Energized by the ECU. Wonder if your car '02 has it also and maybe the relay is faulty or connection to the solenoid is bad. Part number is 996.615.110.00

http://forums.pelicanparts.com/porsc...lay-996-a.html

 

Thank you. I will check this next