Second ignition switch failed? |
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Second ignition switch failed? |
Sprout |
Aug 12 2019, 01:28 PM
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#1
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Member Group: Members Posts: 125 Joined: 5-October 18 From: Kansas City Member No.: 22,544 Region Association: Upper MidWest |
A little guidance, please...I've replaced the ignition switch in my '73 1.7 FI twice now with Meistersatz parts, and the car is dead again. Has only been started a couple dozen times between these two switches. When I turn the key, I have lights on the dash and can hear the fuel pump engage, but the engine does not crank. Battery is at 12.5 and just installed a reman Bosch starter/solenoid. It can be push-started.
From what I've read the switches seem to fail fairly often, but only starting the car a dozen times per switch seems pretty ridiculous. Are the genuine Porsche switches that much better? Do you think I could have something shorting out the switch? The 914 key is the only thing on my keyring, so I know it's not an extra weight problem. When it's running, it runs great! |
RoadGlue |
Aug 12 2019, 07:39 PM
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#2
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Sonoma County Gear Head Group: Admin Posts: 2,033 Joined: 8-January 03 From: Santa Rosa, CA Member No.: 108 Region Association: Northern California |
A little guidance, please...I've replaced the ignition switch in my '73 1.7 FI twice now with Meistersatz parts, and the car is dead again. Has only been started a couple dozen times between these two switches. When I turn the key, I have lights on the dash and can hear the fuel pump engage, but the engine does not crank. Battery is at 12.5 and just installed a reman Bosch starter/solenoid. It can be push-started. From what I've read the switches seem to fail fairly often, but only starting the car a dozen times per switch seems pretty ridiculous. Are the genuine Porsche switches that much better? Do you think I could have something shorting out the switch? The 914 key is the only thing on my keyring, so I know it's not an extra weight problem. When it's running, it runs great! I had the exact same problem with my '74. Sometimes it would crank and rather frequently you'd hear the pump run but the starter wouldn't engage. I pulled the ignition switch, and wouldn't ya know it, the back of the housing was cracked. Purchased a new switch, installed it, seemed to work fine and then shortly after had the same issue. Pulled it out, and hey, it's slightly cracked again. WTF. Installed a second new switch and it had the same behavior. This time I decided to hunt around and found that if I wiggled the relays under the passenger seat while holding the switch to "START" I could get it to crank. Do exactly what "sixnotfour" posted. Bypass all the seatbelt interconnect BS and I bet you'll be on your way. If not, it could be a bad starter solenoid. I'd say ignore any cracks in the ign switch housing for now until you confirm nothing else is causing the issue. |
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