Starting issues (intermittent)
10-31-2010, 05:00 PM
#17
Race Director
FOUND THE PROBLEM. There is some great feedback - thanks especially to Macster for the detailed response. The problem was exactly what he described - I really have to push the clutch sort of hard into the floorboard - then it starts every time. Thank goodness nothing more than the switch. Next step will be to adjust or bend or whatever, so the switch is activated "easier". On the oil level before start - again spot on. I can start the car without waiting, or simply cancel with the computer lever.
Thanks,
DC4
Thanks,
DC4
03-22-2012, 09:14 AM
#20
Drifting
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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?
03-22-2012, 12:36 PM
#21
Three Wheelin'
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.
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.
11-02-2012, 01:27 PM
#22
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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?
11-15-2012, 10:14 AM
#23
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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?
11-15-2012, 10:40 AM
#24
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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.
11-15-2012, 04:52 PM
#26
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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.
11-15-2012, 06:35 PM
#27
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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.
11-15-2012, 08:03 PM
#29
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
http://forums.pelicanparts.com/porsc...lay-996-a.html
Last edited by Ahsai; 11-15-2012 at 08:20 PM.