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no low end. can't advance timing enough?
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01-12-2012, 03:25 PM
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motornut
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: no low end. can't advance timing enough?
egr valve ok? hooked up
how bout stock air cleaner and it's sensors all ok?
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John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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