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Old 12-02-2002, 09:12 PM   #1
79Silv4x4
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Strange miss

I can't work on my truck until tomorrow but I thought I'd get some ideas from you all before I start. Installed an Edelbrock manifold & 1406 a few months ago and truck has run fine until a couple days ago. At idle, in park, there may be a slight hint of a miss but I am not certain. Revved up in park or neutral there is no miss. Drop it in gear and there is a noticeable miss. At highway speeds or under acceleration I do not notice a miss. Lastly, after driving it a few miles it will diesel when I kill it--this started the same day as the miss. So, what do you think? Plugs, Plug wires, vacuum, timing, combo of these or something else. Thanks.
Rob
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Old 12-02-2002, 10:41 PM   #2
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bad module in the distributor. Or not enough power getting to the coil or the coil could be crapping out on you
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Old 12-02-2002, 11:03 PM   #3
79Silv4x4
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Anyway to test the coil/module other than replacing them?
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Old 12-02-2002, 11:48 PM   #4
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Make sure you do not have a vacuum leak. Double check the #8 runner vacuum port.... Everything you have described would lead to a leak.
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