Finding vacuum leaks
(→Vacuum gauge method (internal)) |
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#Attach a 2-foot piece of hose to the end. | #Attach a 2-foot piece of hose to the end. | ||
#Start the engine and let it warm up a bit. | #Start the engine and let it warm up a bit. | ||
| + | At this point, you'll probably have to increase the idle, since vacuum leaks on ANY internal combustion engine will cause a 'loping' idle - the engine will rev up and down a few hundred rpm's. Since it's doing this, the propane will be drawn into the engine, but the momentary increase will be hard to detect, with the idle already loping. Either block the linkage, or block the pedal, to get a STEADY idle. Then proceed to the next step. | ||
#Turn on the propane and run the hose all around the vacuum lines and the bottom of the carb. | #Turn on the propane and run the hose all around the vacuum lines and the bottom of the carb. | ||
#If the engine smooths out or revs up a bit, you have found your leak. | #If the engine smooths out or revs up a bit, you have found your leak. | ||
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