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Re: 1994 S10 Blazer 4x4 4.3L "W" Auto 162k miles
No doubt it's a lack of fuel pressure. The fuel delivery system must be checked while it's still in the vehicle. Ignition in the RUN position, engine OFF, fuel pump running: fuel pressure must be 55psi to 61psi and must remain above 50psi for 3 to 5 minutes after the fuel pump shuts off. If it does turn out to be a faulty pump, stay away from Airtex, they're junk, don't waste your time and/or money. Use AC Delco or Delphi only. Post your results.
http://www.automotiveforums.com/vbul...d.php?t=927589
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