I tested my ecu and it comes back with code 8. I checked online and it says that is my top dead center sensor. I've called several places and they never heard of such a thing. Can anyone tell me what it is? Where it's located? What it looks like? Thanks.

 

I believe that the TDC sensor is reports to the ECU when the crankshaft has rotated past top dead center. If the sensor has a problem, the ECU may not be able to adjust the engines timing correctly, causing it to run poorly.

 

It is part of the distributor.

 

The TDC Sensor determines ignition timing at start-up (cranking) and when crank angle is abnormal.