Quote Originally Posted by Duece coupe View Post
I'll double check for this but with the timing marks lining up and rotor pointing at #1 and the timing light showing 10* BTDC, I would think this would indicate proper timing? I also believe my problem to be a timing issue but cant see how this could be? Maybe that's my issue, not being able to understand how I could be off 180*?
There is easy confusion here, as you must make sure you are on #1 compression stroke and not exhaust stroke. If on exhaust you will be 180° out. Easiest way to check this is to pop compression on #1 (have someone bump it over while your finger is over #1 spark plug hole, when on compression stroke it will blow your finger off). Line up the timing marks and go from there (there are also some excellent posts about finding absolute TDC on this site).

And, yes your transmission's modulator can leak vacuum (as well as the hose going to it). If the bog was gone with the modulator disconnected, you have probably found your leak. And yes, usually it can be changed without pulling the tranny (depending on clearance).