Question about 1993 Chevrolet Astro

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Trouble code 42 ignition module failure

My 93 astro van with a 4.3lt engine starts to miss and the check engine light comes on. The van will run fine for two or three days and then the problem reoccures.
I have changed the ignition module twice but the problem still comes back.
Any ideas?

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  • cpinnell Apr 24, 2009

    Yes it has a HEI distributer

    I have come across a similer problem where the magnet for the pick up was cracked but this is not the case.

    The manual suggests changing the computer.

    Any other tips befor I go this route?

  • carhob May 11, 2010

    before going for ecm swap,check electrical circuits connections and wiring,the tan wire connection for timing bypass,for bad contact or damaged,your problem is intermittent,ecm problem will do it every time!

  • Jerry Koski
    Jerry Koski May 11, 2010

    Say did you put the silicone under the module before putting it down in the distributor ? Just another thought... jerry

  • carhob May 11, 2010

    is it an HEI distributor?

  • Jerry Koski
    Jerry Koski May 11, 2010

    sounds like a coil to me just a thought

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I have a 1993 astro van. I started my van and pulled out of a parking lot and up to a stop sign the van stalled I started it back up and it stalled again now it will not start and I have no flashers, turn signals but I do have headlights a dashlights. I turn the key and nothing happens any ideas

Posted on Apr 04, 2010

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Also check all of your grounds, a little corrosion caused the same problem on mine. Just had to find the right ground. Mine was on front under pass headlight causing mine. Good Luck

Posted on Feb 19, 2010

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