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No it is not fuel, it is water. I did the smell check probably a dozen times. This photo is from idling a long time on a cold day. No doubt there is clear difference though! Due to the popping in the exhaust a fuel leak was my #1 thought (ignition at the cats) and still could be a possibility. My fuel pressure tells a different story, but I'm staying open to this idea. It just means another plenum pull. You did get me thinking however. Even though it seems to be only water, there could be traces of fuel. Perhaps trying to remove permanent marker off a surface with a soaked towel, as pure water won't do this easily. If I end up pulling the plenum again, I will pressurize the rail to check for leaks. I do have a DW conversion kit, so there are 6 more chances that a leak could occur. I used all new O-rings, lubed, etc. but sometimes crap happens. The plugs are NGK PFR6B-11B. Currently gapped to 0.037 as a test, but will return them to 0.035 when all is finished.
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