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What are these bulbs on the dash?
Hi. Its 911sc 1979 sportomatic.
What are these bulbs on the dash? 
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Arthur. Owns a Porsche 911sc 1979 Sportomatic. |
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04-07-2024, 11:35 AM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,432
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Ebrake and Oxy sensor counter.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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04-07-2024, 11:37 AM
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Could you please explain in more detail what they do?
Mine is 1979, If I'm not mistaken there was no oxygen sensor.
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Arthur. Owns a Porsche 911sc 1979 Sportomatic. |
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04-07-2024, 11:47 AM
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I pulled the oil gauge and there was no bulb on the top.
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Arthur. Owns a Porsche 911sc 1979 Sportomatic. |
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04-07-2024, 11:48 AM
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#1 - I don’t think it’s a bulb/lamp indicator, might be just a plug or for some other dial mounting. The gauge looks appropriate for a Sporto but also could be a replacement, the do have a date code stamp on the back.
#2 - is the EGR* or the OX indicator, if it was there it would be a red plastic lens marked as such, and fits into a bulb socket. Good chance the bulb/socket is behind the gauge just hanging. *The EGR indicator was replaced with OX of the SC. It lights up after x amount of miles (maybe 15k) to remind driver to check the emissions system and on the EGR system the lamp could be reset behind the gauge by pressing a button on a small little black box. Most remove the EGR/OX bulb simply out of annoyance and not knowing who to reset it. More of a EPA requirement than a function and it might be required certain counties of California. These are little red lens inserts are no longer available… I’ve been looking for one for sometime. I can’t say if your engine is Non-Catalyst but the gas gauge indicates Unleaded only so you may have a cat-delete exhaust or backdated with SSI ? |
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04-07-2024, 01:55 PM
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Join Date: Jul 2003
Location: Glorious Pac NW
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Quote:
The warning light in the dash, as several have said, is for the EGR/OXS warning light (that comes on when the counter hits 30K miles to tell you to service it).   
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'77 S with '78 930 power and a few other things. |
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04-07-2024, 02:18 PM
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Guys, there is no little black box with the button to reset EGR light. Please check the photos. Also, I recorded the video. The EGR light lights up when the ignition is on and when I start the engine the light starts to blink. Check the link below.
  https://youtu.be/HiIRWNHjstY
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Arthur. Owns a Porsche 911sc 1979 Sportomatic. Last edited by bose213; 04-08-2024 at 09:55 AM.. |
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04-08-2024, 09:47 AM
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This scheme looks similar to my wiring. What is this?
 
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Arthur. Owns a Porsche 911sc 1979 Sportomatic. |
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04-08-2024, 12:20 PM
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According to your PET, looks like you have or had an oxygen sensor. But regardless, the little reset button box is behind the speedometer
Hope this helps, see post #6 here : EGR reset? |
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04-08-2024, 01:14 PM
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