Quick question on engine plug

[Ashley Bowler]

after looking at the engine, I noticed a small round black rubber plug, about the size of a dime. When the plug is removed there are 3 metal contacts. Can someone tell me what this is? Thanks in advance!

[cgarr]

I think its only a test port to indicate TDC on the flywheel

[Ashley Bowler]

Originally posted by cgarr
I think its only a test port to indicate TDC on the flywheel

Huh??? Without me sounding like a complete dope...........could you tell me what "TDC on the flywheel" means??

[bigchillcar]

could you tell me what "TDC on the flywheel" means??

refers to a mark that can be seen only with the engine running and normally with a timing light device on cars without a 'testing port'. provides information needed to properly set the engine's timing. do a search on 'timing' and you'll learn all about it..
ryan

[Jeff]

TDC stands for Top Dead Center.

cgarr is correct, it is a diagnostic plug that connects to another speed sensor.

[Ashley Bowler]

Thanks guys. I do like this Forum. It's a mix of great technical info coupled with some wonderful and entertaining humor.

[cgarr]

So were being laughed at?

[Wil Ferch]

That's *we're* being laughed at....as in ...we-are being laughed at .....



- Wil