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  1. M

    98 Tahoe ECM-1 fuse blowing

    The FI body was my conclusion as well. Thanks very much for your time and assistance.
  2. M

    98 Tahoe ECM-1 fuse blowing

    With ECM fuse in-place, ECM connected and power on, checked voltage from each FI pink supply wire; with multimeter to ground, voltage measured 12.11v for each wire; with multimeter connect to pink wires and corresponding wire to ECM, essentially across FI connection, voltage measured 11.93v...
  3. M

    98 Tahoe ECM-1 fuse blowing

    Here's what I did:[LIST] with FI assy, ECM disconnect and fuse out: checked each FI pink feed back to the ECM-1 fuse to check continuity; checked ea FI colored wire back to ECM to confirm continuty with FI assy disconnected, checked resistance across each injector's connectors; res registered...
  4. M

    98 Tahoe ECM-1 fuse blowing

    just finished checking the continuity on the rest of the wires back to the ECM. all checked out so I guess that leaves me with the fuel injector assembly. also, I did a circuit test with the ECM disconnected the fuel injector assemble connected. with the FI assembly connected the test lamp...
  5. M

    98 Tahoe ECM-1 fuse blowing

    I checked resistance on all the injectors; the one I was concerned about registered 11.9 ohms as did one next to it, the others were 12.0 or 12.1. Looks like I'll need to trace the other wires as you suggest to see if I can find any shorts. I did seriously consider repalcing the one faulty...
  6. M

    98 Tahoe ECM-1 fuse blowing

    Yes, I hooked a multimeter to the ECM-1 fuze and checked each individual pink wire running to it and confirmed continuity on each. I didn't check resistance on each but will do that tonight. What i did find was that one injector of the bunch seemed to have a short across the connectors that...
  7. M

    98 Tahoe ECM-1 fuse blowing

    That was it! I pulled the connector off the throttle body injector assembly and the test lamp went out. After checking continuity on the wires, it appears I have a faulty injector assembly. Thanks for your help.
  8. M

    98 Tahoe ECM-1 fuse blowing

    Thanks. I'll check that one out.
  9. M

    98 Tahoe ECM-1 fuse blowing

    98 tahoe, 2wd, 4dr. Need help determining why the ECM-1 fuse continues to blow. Wouldn't start after being parked for an hour. Found the ECM-1 fuse had blown; replaced fuse and it blew again as soon as I turned the ignition on. Checked fuel pump relay, tested good. put a test lamp in the fuse...

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