Recent content by marsmann

  1. M

    Knock Sensor Wiring and ESC/ECM signal/voltage questions

    Hi all. Vehicle: 1990 K1500 5.7 TBI stock Problem: Pinging on moderate throttling. SES will trigger on excessive pinging. Fuel pressure is good @13psi, no apparent vacuum or other leaks, compression is good and plugs are burning well. ESC module has been tested and swapped. Wiring /...
  2. M

    Aftermarket ignition coils

    Concur with the other posters above. There has been an increasing trend for parts reliability over the last several years with MSD coils. I've seen it firsthand just like others here. BWD is ok, and seems to do well but typically with certain parts you want to stick with AC Delco or Delphi...
  3. M

    95 z71 tbi issues

    eliminate basics. check plugs, wires, cap and rotor. start from there and then we can move on to other areas.
  4. M

    Looking for fresh set of eyes, additional input - Strange starting issue

    Good and very logical theory. I wonder myself if we will see the problem resurface. Good thought to keep an eye out and watch for that. So far she's been running fine, I've been checking it constantly almost paranoid it will return. I did swap coils at one point but it is possible that it...
  5. M

    Looking for fresh set of eyes, additional input - Strange starting issue

    Well, I keep going around in circles for the last couple of days and I got it resolved. I put in yet another, new distributor. Installed everything the same way as I had done a dozen times before. This morning, with the 3rd distributor it finally started and didn't stumble on cold. I'm still...
  6. M

    Looking for fresh set of eyes, additional input - Strange starting issue

    Here is the scenario - I am assisting in a complete restoration of a 91 k1500 4wd. new, and I mean new, everything. All parts/sensors are Delphi or AC Delco. I've also verified every part and sensor to ensure proper voltage and ohm specs and in some cases even swapped with known working parts...
  7. M

    Oil Leak! Rear main seal replacement?? PLEASE HELP!

    Looks like magimerlin does it the way I do. Read post # 13 in this thread that expands just a bit more on what magimerlin described! http://www.gmt400.com/forum/showthread.php?28955-Rear-Main-Seal-replacement-Best-Way/page2
  8. M

    Frustrating problem with timing advance

    If mechanical timing with EST bypassed and basically no computer advance is fine then your distributor/install is ok. What you are dealing with is all within the computerized advance timing. A vacuum could cause some funny loping or surging of the idle which would move the mark when putting a...
  9. M

    TPS woes (tbi)

    Yes, I think the wiring is the same if I recall, it is just the sensor itself that changes. But to be sure I would just try to find a few pics online of engine bays to make sure.
  10. M

    Brake lights. Turn signal and reverse lights not working

    What have you checked/tried so far? There are fuses for tail/stop lights - check those. There are grounds to check under the bed that go to the frame. Clean those. If you have a trailer harness for your hitch, check/wiggle that. Bypass to see if the lights work Check the bulbs and make sure the...
  11. M

    Rear Main Seal replacement, Best Way?

    Try this - pull the inspection cover then remove the 3 torque converter bolts. You should have enough room to slide the converter back then remove the 6 bell housing bolts holding the engine and transmission together. Pry the two apart about an inch. This should allow you to go up between the...
  12. M

    TPS woes (tbi)

    That is pretty much it. There was a slight variation from the 90 into 91 and 92 style. You will see differences between these years. One is taller, more vertical where the other is more horizontal. If you got a TB with the different type, just get a new one for that TB like you said. I highly...
  13. M

    Intro

    Hi all. New to the forum, but I'm an old wrench. I'm not online too often but happy to be here and help/share any knowledge. Thanks for having me.
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