Question about 1993 Chevrolet S-10 Blazer

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93 chevy g20 van

Van wont start replaced plugs,wires,cap,rotor,fuel pump,fuel filter,coil,air filter & distributor module. ECM diagnostics return code 12 (default).

Help please! This is baffling.

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  • cacti Jun 25, 2008

    after replacing all of this i have no spark from the coil

  • Anonymous Mar 15, 2014

    1987 ranger 2.3l runs till warm. replaced both fuel pumps, fuel filter, fuel pressure regulator, coil, distributor, rotor, cap, wires, plugs, ign module. still same issue

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More than likely it's the distributor. They have a tendency to build up corrosion and rust and have personally went through the same situation three weeks ago on a suburban. Check to see if you are getting spark from the distributor first. Have the ecm in the distributor checked at Oriellys for free. It's under the rotor and has two 8mm head bolts with wires plugged in at each end.

Posted on Jun 22, 2008

  • Lee H
    Lee H Jun 25, 2008

    will have the answer 4 u tomorrow.

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Check the power wire to the cap, and that the wire is hot in run / start. Might be a fuse or other problem not getting voltage to the distributor. If you do not have voltage but the fuse is good you might pull the fuse block down and look for corrosion where the wires plug into the back. Another thought, check that there is a good connection from the battery negative to the chassis. That can leave you with some strange problems. Larry A.

Posted on Sep 25, 2008

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