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You need further information from more experianced folks, such as BlazerLT and others, but I will tell you that fuel pressure seems way too low. Mine calls for 55-60 lbs.(4.3 Vortec, 93 S-10 Blazer) Also, you should have replaced the main cpi when nut kit was replaced. Best places to buy from what I have found is Ebay. provided you have a 4.3 motor there are several people selling cpi units and some are parts companies who sell other parts. Cpi's run anywhere from 200-260 there for GM units. I found a guy who sold me nut kit, injector assy, and plenum gasket for $292, frt paid. You can find aftermarket items at Advance, but I don't think you should. You might also check your coil and ignition module for weak power. And your fuel pump seems a likey problem as well with only 35lbs pressure. See what these other folks think, but that is my opinion.
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