Vacuum testing to diagnose fast idle

[alexiskai]

Originally Posted by PC/SR

Sounds too simple, but have you checked manifold torque, and/or gasket leak? Easy to check, and I like to check the easy things first. It is too often that we over-analyze problems.

I personally think it is a carb problem. (Or ignition as second choice.) The best/easiest way to check/eliminate carb is to swap your carb with a pal's carb that runs right, and try your carb on his car and see if you can adjust it.

Yeah, we went over a lot of this in the previous thread. Manifold and gaskets have been checked. The carb is nearly new, from Bert's. Steve at Bert's thinks it may be the ignition; I'm waiting on a response from him to see what tests he recommends.

I ran the engine speed up to around 2000 and the reading didn't steady out very much.