W113 Pagoda SL Group > Drive train, fuel, suspension, steering & brakes

Intermitant firing of Cylindar

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johnm:
 I Think next I'll switch two of the spark plugs and see if the issue follows the plug currently in #6 cylinder. I'll report the findings. Thanks very much for the feedback on this issue.

Shvegel:
I second Joe's comments regarding the automatic transmission diaphragm.  Happened to me,

johnm:

 How do I check the automatic transmission diaphragm.
 Thanks
John

ja17:
Disconnect the line at the manifold and see if trans fluid is in the line. Also if you have a mini-vac, you can check to see if it holds a slight vacuum.

Benz Dr.:
I would think it should hold full vacuum. The engine pulls full vacuum while decelerating and even a small hole or crack will let a lot of fluid through. I once had a modulator diaphram blow out and I couldn't even see my house next door - that's how much smoke it made. In this case, the smoke is more white than blue which is engine oil in that case.

Do you see any smoke or is your trans fluid going down?

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