Rough idle/no rev problem

[911monty]

Originally Posted by tada

Thanks for all of the input. I ordered a exhaust pressure tester and will check for a clogged catalytic converter tomorrow. I will play around with finding TDC and BDC tonight. Thanks again, Tom

And by the way Markus, your English is excellent. Far better than my German could ever be.

Tom; You just need to find TDC #1 (timing mark) find piston top with chopstick through spark plug hole and mark. Turn crank 180 deg (BDC) and mark chopstick again. Then place chopstick into each cylinder and rotate making sure all pistons reach the same marks. It's not precision, just looking for major difference.