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Join Date: Apr 2003
Location: Colorado Springs Co
Posts: 147
Garage
Find the leak

What is the best way to find a vacuum leak? Upon returning from a two week vacation I started up the porsche and for the first 10 to 20 seconds it had a good idle and then all of a sudden it would miss and backfire. I had to feather the throttle to keep it running.
After warm up it still ran rough. checked the vacuum and guage read about 10 inch hg. Shouldn't it be a bit higher?
Is it wise to spray carb cleaner around areas to find leak?
It's a 1983 SC
Thanks for any help
bk

Old 06-04-2004, 05:00 AM
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Join Date: May 2001
Location: Canada
Posts: 4,983
Use either quick-start (spray it on the hoses) or an unlit propane (or acetylene) torch. As the gas is sucked into the engine your rpm will rise.
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Old 06-04-2004, 05:28 AM
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Join Date: Apr 2003
Location: Colorado Springs Co
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Thanks the torch seams like the way to go
bk

Old 06-04-2004, 05:30 AM
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