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  1. Thomas Moore

    Missing under load after tune-up.

    Well....I think that suggestion was on something like Fixya, probably not the best reference but I can't find the damned thing so it was worth a try but it's not there. Not anywhere that I can find so I guess maybe it's in the ECM or PCM or Engine Control Computer. I've been looking for the...
  2. Thomas Moore

    Missing under load after tune-up.

    Schurkey - Apologies for being unclear and thanks for the help. The "it" in this case is ignition timing. I will find and follow code 43 diagnostic procedures in the service manual. I just read that the esc on my truck might be located on the lower drivers side block, below the exhaust. seems...
  3. Thomas Moore

    Missing under load after tune-up.

    Thank you Schurkey for this incredibly detailed reply. I am grateful for your time. I will in the future add the code descriptions as well as the numbers. I did download the service manual and will continue diagnostics using it. When I replaced the ESC module the tab on the plug inside the...
  4. Thomas Moore

    Missing under load after tune-up.

    Also meant to post the codes I got. 12, 43, 66, 67
  5. Thomas Moore

    Missing under load after tune-up.

    Hi all. I need some help. I have a 1993 GMC Sierra 1500 SLE 5.7 Automatic with316k on the clock. The truck was missing but ran pretty good and reliably. An experienced mechanic friend offered to help me replace my leaking radiator, do a tune up and clean up the grease and oil from leaking valve...
  6. Thomas Moore

    What does all this mean

    I had a lot weird-ass electrical problems like that and I replaced the ground straps. I had 2, one from frame to engine block and one from frame to body/cab. They are the braided copper straps in the engine compartment.

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