1993 Chevy Suburban C1500 won't start and has no spark from the coil

Discussion in 'General Chevy & GM Tech Questions' started by leb01amg, Nov 19, 2013.

  1. leb01amg

    leb01amg New Member

    I have a 1993 Chevy Suburban C1500 with an automatic transmission. Recently it stalled on me when making low speed turns but would restart. I changed the distributor cap, rotor, spark plug wires, and spark plugs and the vehicle continued to stall. The truck finally died on me and I had it towed home where I replaced the distributor (with ignition module) and IAC valve. The vehicle ran fine for weeks until I went to bleed my brakes. While depressing the brake pedal during the bleeding process, the vehicle began to run erratic and stalled. I completed bleeding the brakes and the truck began to run progressively worse with each depression of the brake pedal. As I backed out of my driveway, the truck stalled and I haven’t been able to restart it since. I have fuel spaying in the injectors (perfect spray pattern) but I have no spark from the coil. I am reading 12 volts from the control module to the coil but not spark. The only code I got for the body computer was low voltage to the fuel pump relay. The coil is new, distributor & module is new, and I changed the IAC valve twice. My truck does not have an electronic spark control module under the hood or under the body computer. I suspect the body computer but I was wondering if it would still produce codes and fire the injectors if it were bad. Is there a possibility that the coil I purchased is bad and how common are bad aftermarket parts? I know Delphi had some problems a few years back.
  2. mfleetwood

    mfleetwood Epic Member 5+ Years ROTM Winner 5000 Posts

    *****Thread moved to correct section of Forum****
  3. GeoLow97

    GeoLow97 Member 1 Year

    Just wondering...did you get the suburban straightened out? Sounds like quite a perplexing issue . I'd like to know your findings, should I encounter a similar problem. Don't have a TBI truck right now, but I've never been more than a year or so without one since '88.

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