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Re: Fuel Pump Dies, Then Tow Truck Driver Dies!!!
Your timing is probably over-retarded due to the computer trying to compensate for a lean fuel mixture seeing there wasn't enough pressure and flow.
Remove the negative terminal and the two ecm fuses while the battery is unhooked and allow the computer to reset and relearn the proper long term fuel trim with the proper fuel flow, pressure and therefore the proper timing.
It will help you. 
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1995 Factory Blazer Service Manual for sale, PM if interested.
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