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kevin 2/11/2012

1990 GMC R1500 Suburban SLE 8 Cyl 5.7L


help with my engine problem

has been running fine i filled up with gas now i have a rough idle and a chattering sound only under a load the sparkplugs were black changed them it is driving me nutts to figure this out have changed the fuel filter and plugs it also has a miss to it

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