That method will work, although something like WD40 will work too, but is less dangerous. The propane propellant does the job as well as starting fluid. The RPM may rise or drop when spraying, depending on the particular circumstances, so the thing to look for is a change in RPM.
Air won't be escaping if there's a vacuum leak, so the soap won't help find the leak.
Last futzed with by Triple Jim; November 8th, 2017 at 08:41 PM.
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