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I have two 900 EFI sleds. While the sleds were cold I pulled one spark plug and tested the cylinder. And I did the same for the other cylinder (then the same for the other sled). Then I let them warm up for a few min. Ran the same test but the numbers stayed the same. I thought that the pressure should have increased, am I wrong? Also what should my numbers be at 9,000 warm or cold? Thanks Ross