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#52665 11/20/2005 6:02 PM
Joined: Mar 2004
Posts: 71
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Joined: Mar 2004
Posts: 71
I had picked up a shudder under acceleration in my 49 1/2ton with 216.

I made the cardinal sin of doing two things before testing it out so I'm not sure which was the culprit.

I did find that the vacuum line fitting going into the carb wasn't completely tight but I also replaced the plugs which were starting to carbon up.

Question. When replacing the plugs, I noticed that the plug in cylinder 5 appeared to be fouled. Could a vacuum leak cause one plug to misfire?

Anyway, she is running fine again so hopefully I fixed the problem. Thanks to all.

#52666 11/20/2005 6:44 PM
Joined: Jul 2004
Posts: 5,708
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Joined: Jul 2004
Posts: 5,708
hrockwell,

It is great that you took the time to report back, I am sure everyone appreciates it.

I think the vacuum leak would affect the entire system. Number 5 was susceptible to this problem more than the other cylinders. Who knows why? As my cousin used to say, "It'll develop". smile

Stuart


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