Stop Stall

[larrys40]

I would suggest as noted to do a compression test . See how that pans out. Poor seating valves and valve settings too far off can cause uneven idle and running. You may need to do a leak down test and see where things go from there. Careful diagnosis is the key. You’ve been working on the easy things that’s too can have an effect.
Larry Shepard

 

[ampico-kid]

I as well am curious to where you run your GAV once your up and running. What about your other Coupe that runs and drives good? Once it’s warmed up and running where do you have your GAV set?

This car (the Sedan) seems to run best with the GAV almost completely closed. I'd say it's about 1/4 turn open. The Coupe is very forgiving and normally I run the GAV at about 1/2 turn when it's operating temperature.

 

[katy]

Got the machined manifold back and installed it. Although the car does run better, it still is not a smooth running engine. My Coupe (which has 30K miles on the rebuilt engine) runs like a finely tuned clock. This car runs like a person in need of medical treatment of some kind.

Possible worn camshaft, or maybe timing gear one tooth off the mark.

FWIW, had a problem one time w/a Model T, couldn't get it to idle nicely 'till I replaced the camshaft w/a reground. That wasn't the only problem w/a supposedly "rebuilt" engine.

 

[ampico-kid]

Did a Compression test today. Results were not encouraging. Cylinder One 66psi, cylinder two 60psi, cylinder three 40psi, and cylinder four 71psi. Looks like number three has a problem. I did this reading with a cold engine, but I think this gives me a pretty good idea of where the problem lies. The question now is....what's next? Does this indicate a bad head gasket? A cracked block or head? A bad valve? I'd assume the next step is to pull the head and check things out? Opinions? Thanks.

 

[ampico-kid]

Did the Blown head gasket test today. Although not totally conclusive, I think it's clear enough to assume the head gasket is leaking. The fluid, which starts out a very distinct blue, and if there are exhaust gases in the coolant, it is supposed to turn yellow. Well, mine turned a very distinctive green which would indicate some exhaust gases present in the radiator coolant. At this point I guess I'll have to go to the next step which is to pull the head off and see what I find. Wouldn't you all agree? Thanks.