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Home » Public Forums » GMCnet » What are the telltale signs of a restricted exhaust (From a steady 18 inches of vacuum to bogging down in 2/3 minutes)
What are the telltale signs of a restricted exhaust [message #264509] Sun, 19 October 2014 16:10 Go to previous message
budworks521 is currently offline  budworks521   United States
Messages: 137
Registered: October 2013
Location: Grand Rapids MI 1974 Pain...
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Senior Member
Another sad story after supposedly fixing my issue. I was wondering if anyone ever experienced a steady reading of 18 inches of vacuum for a minute or so and then the gauge slowly descends to zero and the engine shuts down?? My vacuum gauge has notes that state a restricted exhaust. I had no problems with the engine two weeks ago after finally eliminating my carb from flooding. Now I can't keep it running? My number 7 plug looked gassy. All the others burned fine. Sounds great until until the engine stumbles. My exhaust looks sketchy. New mufflers might be in order??? Thanks for any insight.

1974 Painted Desert 455 upper half rebuild constant project inexperienced mechanic Grand Rapids Mi Always trying to learn
 
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