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Old 11-14-2011, 02:31 PM
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Can I Do An Accurate Compression Test With No Carb?

Like the title says. Can I get any readings I can use or do I need to wait?
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Old 11-14-2011, 02:52 PM
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Yes and no. You are supposed to have the carb at WOT anyway. The only thing is you will be doing it cold with a vehicle that has sat for who knows how long. If the vehicle has sat a while the reading will be low but it will still tell you if the cylinder pressures are even or not.
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Old 11-14-2011, 04:21 PM
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Compression will change on a cold vs. hot engine, regardless of the carb. So you can get an accurate reading, you'll just have to consider it as an accurate cold reading, and know when warmed up it will probably be better.
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