[silver911rdb]

Quick question. I just measure the resistance on my reference/speed sensor in my 964. It measures approx 500 ohm. Manual says it should be 960 +/- 96 ohms. The motor fires up and sounds normal. I'm having an issue with the headers glowing (even at idle I see a faint glow). Infrared thermometer shows temps in the 750 range at idle. I've checked most everything trying to narrow down the problem. Would this sensor cause the headers to glow? I'm guessing maybe the ignition timing would be effected by this causing it to run too hot.