Search results

  1. Schurkey

    Fuel line replacement?

    ...and then sell the tool to recover some of the money. Or form and bend fuel and brake tubes for your friends. Or use crimp-on ends on the bare, straight tubing, that accept race-style 37 degree flare fittings. Double-wall seamless steel tubing is no big deal to bend. There's many...
  2. Schurkey

    Timing advance

    I don't think so. I think the synchronization has to be farther off to get the code to set.
  3. Schurkey

    Valve train problems

    Still haven't answered this. '95-older = flat tappet unless it's been changed. '96-newer = roller cam Might not throw a "code". Still worth checking. I didn't ask about "codes". Connect a scan tool, look at the data stream; especially for knock sensor activity. How do you know? The...
  4. Schurkey

    5.7 vortec hesitation and bog HELP

    P0303 = misfire on #3. A misfire, left unrepaired long enough, will cook a catalyst. P0430 = Catalyst efficiency as read by O2 sensors https://www.carparts.com/blog/p0430-code-catalyst-system-efficiency-below-threshold-bank-2/ P0102 = Mass Air Flow circuit low input...
  5. Schurkey

    Diagnosing Rough Idle Hell

    Thanks for that. Mind if I "borrow" that phrase?
  6. Schurkey

    NEED HELP.

    It's possible--but NOT recommended--to pull the engine, trans, and transfer case as an assembly. MUCH easier to support the trans, leave the transfer case bolted to the crossmember, and just yank the engine by itself. As said, be sure to disconnect the torque converter, and push it back from...
  7. Schurkey

    Timing advance

    Connect a scan tool, look at the data stream. See what the fuel trims, O2 sensor, MAP sensor, etc. are doing during the "hiccup".
  8. Schurkey

    Steering Wheel Upside Down

    The rag joint goes onto the steering gear one way. That's the point of the flat area on the splines.
  9. Schurkey

    How NOT to flush your power steering fluid

    Not even GM seems to know. The "capacities" listed in the PS section of my '97 GM C/K service manual lists only the part number, and specification number of the recommended fluid. I wouldn't have less than two quarts on hand.
  10. Schurkey

    Anybody see this before??

    MUCH respect for competent weldors. I own some welders--Lincoln MIG 215, TIG 175, and a modest oxy-acetylene system. But I get very little torch time; and almost none at all now that I'm at the "new" house that has limited electrical service. Three very important things I learned: 1. The...
  11. Schurkey

    Any measurements to set the caster and camber and toe

    It would be nice if you'd tell us WHAT VEHICLE you're working on.
  12. Schurkey

    95 Suburban rear heater hose questions

    GM used high-quality hose permanently crimped to metal ends, because they wanted a durable, leak-free connection. That's what I'd recommend you use--OEM-style crimped hoses. If you MUST use crappy worm-gear hose clamps, at least make sure you buy "Shielded" clamps, so the hose doesn't...
  13. Schurkey

    Help

    WHICH "Vortec short-block"? 305? 350? Have the heads been milled? Block decked? Unusual-thickness head gaskets? I'd expect the rockers will have to be self-aligning. The pushrods "should" be OEM length for roller cams. Biggest problem I see is folks who can't find the true "zero lash"...
  14. Schurkey

    Fuel line replacement?

    If this were me, I'd make my own from a coil of inexpensive double-wall seamless steel tubing, or perhaps a roll of nickle-copper "Nicop" tubing. Add sections of flexible hose only where needed, using steel-braid-over-Teflon (PTFE) liner hose and proper hose ends. The worst part would be...
  15. Schurkey

    Timing advance

    "Missing" does not mean the timing isn't advancing. In fact, under load the timing might retard. Sounds to me like you're describing failed insulation on the secondary circuit, or a weak ignition coil. How old are the spark plugs, plug wires, distributor cap 'n' rotor? Caps seem to be a...
  16. Schurkey

    Valve train problems

    WHAT YEAR VEHICLE/ENGINE??? Flat-tappet cam, or roller cam? Oil level correct? Can you narrow down the location of the noise by running the engine in Park or Neutral, and using a mechanic's stethoscope? Remove valve covers, run engine. All the rocker arms moving about the same amount? Any...
  17. Schurkey

    Ignition timing

    I suspect problems. When I connect the wire on my '88, timing instantly jumps from "0" to perhaps 12 degrees. I've never paid attention to how much it jumps, just that it does. As far as I know, the timing should increase if the engine RPM is greater than 400. (i.e., ignition module controls...
  18. Schurkey

    Rough idle

    Why are you starting a new thread on the same problem you already got answers on in your previous thread? https://www.gmt400.com/threads/fuel-pump.53519/page-3 And in this thread, you forgot to mention that you've got an undiagnosed/unrepaired Code 42 that might be the root cause.
  19. Schurkey

    Ignition timing

    Worth looking into. Find "TRUE" TDC for #1, compare the timing pointer to the damper groove position.
  20. Schurkey

    Ignition timing

    Define "base". Do you mean the initial timing with the timing wire disconnected? Timing stays at 0--3 degrees until you rev it, then it advances? The computer is providing the equivalent of centrifugal and vacuum advance. Wouldn't surprise me to see a big jump right away, but I've never...
  21. Schurkey

    Steering Wheel Upside Down

    It's hard to "upgrade" your family. You'll be a hero if you can figure out what they couldn't. Or they'll hate you for showing them up for being incompetent. One or the other...
  22. Schurkey

    Steering Wheel Upside Down

    Turning the steering wheel from lock-to-lock, and then going half-way in between, is the START of finding center-point on the gear. If the vehicle alignment is far enough off, you'll get a false result if the wheels hit the frame, control arm, or whatever before the steering gear gets to the...
  23. Schurkey

    Fuel pump

    See quote above. You need the Genuine GM service manual, you need to follow the "official" procedure for diagnosing Code 42. You'll be testing each component as they describe, or you're just guessing. Some folks like to guess. Sometimes they get lucky. Often, they end up posting on forums...
  24. Schurkey

    Steering Wheel Upside Down

    All this talk of unbolting/rebolting, and just turning the wheel or the rag-joint half-way around. That is NOT the right way to fix this. >>>FIND THE CENTER POINT OF THE STEERING GEAR<<< Everything else aligns to match the center point of the gear. For all we know, the wheel is half-a-turn...
  25. Schurkey

    Fuel pump

    Yes. Might make the engine not run at all. So would fifty other things, like a failed wire harness, a failed pickup coil, a failed ECM, a failed injector, failed intake gaskets, failed valve or seat, on and on and on and on. There is NO SUBSTITUTE for proper diagnosis. Replacing parts at...
Top