jtexas
Fleet Admiral
- Joined
- Oct 13, 2003
- Messages
- 8,646
Okay, I'm about to reveal some real ignorance here so don't laugh...I have a brand new comp tester, was given to me back in the 80's, never been used.<br /><br />Now I want to decarb my '79 rude 70, and want to get baseline compression numbers.<br /><br />I know I'm supposed to screw the hose end into the spark plug hole.<br /><br />Should the other two spark plugs be in or out? <br />If in, should they be connected or disconnected?<br />When I turn the key, how long do I let it crank? <br />Will the gauge continue to show the reading afterwards or do I have to watch the gauge while somebody else turns the key? <br /><br />I just happen to have a heavy-duty automotive momentary starter switch here, can I use it to start the engine, and if so, how do I connect it?<br /><br />thanks,<br />john