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09-20-2015, 05:57 PM
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#20 |
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Registered User
 Join Date: Dec 2002
Location: Northern Virginia
Posts: 1,268
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Re: Rough Run
Have you done a compression test. I had my 71 blazer that I have owned forever start doing similar things. Ran good but had a hic up in it. Had about a 130k on it did a compression test. 7 cylinders were great one very weak. Bought a 1970 blazer that ran good just felt like it needed a tune up. Tuned it up it became more noticeable. Same situation. Hopefully thats not your cause. Good Luck
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