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Old 01-10-2007, 04:18 PM   #1
77Vandura4x4
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Join Date: Dec 2006
Location: Canada
Posts: 16
Need help with my distributer firing order

Just rebuilt my 350 from my 1977 Gmc Vandura 4x4, and noticed it wasnt running right. So while it was running, i pulled the plugs one by one from the distributor and noticed no change in engine performance on plugs 1 7 6 and 4. The distributor is producing the electrical current, but those cylinders arent firing. I did a compression test and they all are at 150. What do u think the problem is?
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