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Hi guys I have a XC 351C and am having a knocking problem when accelerating medium to hard. Light acceleration is ok. I checked the initial timing and it seems to be a bit high about 12 degrees the problem is when i go to retard it (even a little bit)the engine doesn't seem to like it. It runs rough and wants to stall. Any idea why it is doing this?
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you could try speeding the idle up a little.
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Factory setting between 6-10deg depending on what year the cars made.
Try 6 deg and up your idle as Bill has already suggested.
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Try adjusting your idle also maybe you distributor is out a tooth.
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don't forget to disconnect the vac advance and plug it off......I've seen many who forget to do this.
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