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Well, I lowered my idle to around 700 RPM now there is an annoying rattle coming from what seems to be the front of the engine. My car doesn't have cruise control. I need to get a timing light to see how to do the timing right, but I did it by hearing it only and the rattle got a little less noticeable. But not when ever I switch gear it backfires it didn't do that before I lowered the idle. The car is at normal operating temp well, don't know about normal but, the way it usually operates.
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