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I have a carbed 7.4L engine in my Blazer. There is something wrong with one of the cylinders, not sure exactly what, but when it's spark plug wire is hooked up it backfires through the carb. When that cylinder's wire is unhooked, it runs fine. Is it bad to drive around like this? (on only 7...

Given some of the ridiculous fuel prices lately I've been looking into biodiesel, though I don't have a diesel vehicle yet. What I've learned is that vegetable oil as compared to diesel is a very strong solvent and adds lubrication. What if you added around a quart of fresh new vegetable oil to...