Search results

  1. Road Trip

    Fuel pump

    Yeah, I also noticed after the fact that a full screen snap is sub-optimal when wiring diagrams are involved. Let's try this instead. Instead of a screen snap to a .jpg, this time I extracted the page in question to a .pdf file and attached that. On my end this looks to be a near 100%...
  2. Road Trip

    Cylinder Compression

    Greetings katwood16, When you installed the timing gears & chain, did you line up the timing marks per the manual? We need accurate cam/crank phasing in order to generate proper compression. And if that is known-good, we then need to verify how you adjusted your valvetrain. (Lifter preload?)...
  3. Road Trip

    IAC counts high

    Greetings dhworkin, Welcome to the GMT400 forum. I don't know the age and/or condition of your harmonic balancer. If it's the stock one, the outer ring may have slipped in relationship to the inner hub after all these years. (I wish that a small painted witness mark would be drawn on all...
  4. Road Trip

    1990 C1500 distributor reinstallation

    Greetings Herbk, Welcome to the GMT400 forum. Been where you are. If you do the following sequence of events, you should have no problems with the distributor R&R: 1) Disconnect the battery. Prevents accidental turning of the engine while the distributor is out. This is 99% of the reason...
  5. Road Trip

    Cooling System Upgrade/Replacement

    Sounds good. I much prefer a straightforward parts fatigue type failure as opposed to an issue where the cooling system is being pressurized from a failing spot in a head gasket. Sounds like you managed to add some cooling system headroom by a savvy treasure yard upgrade while you were at it...
  6. Road Trip

    Cooling System Upgrade/Replacement

    I've seen that plunging behavior when there was an air pocket in the vicinity of the thermostat. Make sure that you have the overflow tank in place and keep filling it back up to the cold mark until the system quits burping air/slurping water coolant to replace it. Once the system is 100%...
  7. Road Trip

    Fuel pump

    Turns out I did. Check out this SIR page taken from the '96 FSM. (See attached.) Another fun factoid you can share at the next party you get invited to. :0)
  8. Road Trip

    Fuel pump

    I just rescanned the '97 FSM for all instances of G201. Sure enough, it's a separate ground dedicated to some sections of the SIR circuitry: By the same token, G200 is also intertwined in all this. (Admittedly this the first time I've looked at the SIR circuit, thanks to the fact that the...
  9. Road Trip

    Fuel pump

    Physical location illustration of G200 & G201: And the big picture overview of how the Ground naming convention is laid out: For what it's worth --
  10. Road Trip

    Fuel pump

    Hello 62barsoom, According to the '97 FSM, the short answer is that there are only 2 grounds in the cab area: Given the 5-image limit I'll have to post the physical location illustration in the next post. And if I'm not mistaken, G201 is only used for the Air Bag setup? At any rate, you...
  11. Road Trip

    Distributor problem am lost

    My best guess from over here is that the spring loaded conductive carbon button that goes between the cap-mounted coil & the spinning rotor underneath is MIA, and this missing component would lead to this kind of high-voltage carnage: Note: The large cap HEI system is the unofficial Honey...
  12. Road Trip

    P0303 Misfire only under load

    + **** Greetings SableSlayer, Looks like both @Jacobchevys & @98yuk haven't been in here for awhile, so although my comments pertain to all 3 forum members, I am going to focus on your situation, since you are currently active. **** The SBC in our GMT400s can falter in one of 2 ways. The...
  13. Road Trip

    My 1991 RCLB C1500 Silverado

    From up here in the rust belt that looks to be a super clean beauty of a RCLB. Take good care of your first truck, for you will be making memories that will last a lifetime. And you may not realize it yet, but there are a lot of people who will walk by all manner of new trucks in order to get a...
  14. Road Trip

    Teal daily driven farm truck.

    I'm old enough that we used to rebuild Master Cylinders as the default, and only swapped them out when the original unit was beyond repair. Anyway, I just wanted to share that your last sentence is spot on. Back in the day we would have a vehicle with a firm pedal, but noisy wear squealers...
  15. Road Trip

    Teal daily driven farm truck.

    ...and there's the last piece of the puzzle for yours truly. My bad for not reading for comprehension. With all new braided stainless, everything fully adjusted, and a fresh, correct master I would expect a really good pedal? I'm looking forward to what you figure out. This is a head scratcher.
  16. Road Trip

    Teal daily driven farm truck.

    I agree with GrimsterGMC's diagnosis. Given this, there's a real good chance that the seals in the master cylinder are on their last legs, and the poor pedal feel is due to internal leaking between the 2 circuits in the master. Based on my own GMT400 ('99 C2500 w/JD7) it *is* possible to have...
  17. Road Trip

    Wiring issues

    No worries, no rush. We all realize that life happens and that we're all fitting this in whenever a free moment allows us to do so. I know I've got deadlines looming having to do with an upcoming move, so I'm going to be a bit spotty in here myself. But the good news is that there are...
  18. Road Trip

    Wiring issues

    Hello again MYF, We have yet to touch on this, but I decided to take quick look and see if we couldn't use your test results to help illustrate how to troubleshoot an issue like this using the wiring diagrams in the FSM. **** First of all, I decided that with my luck using a '99 manual to...
  19. Road Trip

    Wiring issues

    Greetings MYF, A saying that I happen to agree with is that you don't fail until you quit. I know what it's like to have a project get bad stuck, and you start to get the feeling that this is going to become a failure that will color how you feel about your ability to keep something rolling...
  20. Road Trip

    305 Is a Turd Correct?

    Back in the day I used to read articles where because of the difficulty in getting a stick-equipped vehicle past emissions (compounded by the low percentage of overall sales) there was a time where supposedly no stickshift vehicles would be offered at all. We tend to forget that back then it...
  21. Road Trip

    New guy from Ohio

    My take is you now own a RCLB chore truck with a very fair price of admission. Even if you only get 4 or 5 more years of use out of it you will still end up with a much better 'price per use' number than if you were starting with a new $50-$70K full size truck that will last longer. Not to...
  22. Road Trip

    Hooked up battery backwards

    GTG, I just pulled this Caution out of the '89 Service, Driveability, & Emissions manual: If the key was on when the battery was connected backwards odds are the computer is smoked. Even if the key was OFF, there is still 'Hot At All Times' power on a separate pin that's used to to keep the...
  23. Road Trip

    1998 no load stumble

    Knowing that a *light* touch of the brakes while cruising (ie: just enough to activate the brake lights, but not enough to create drag) will disconnect the TCC, it would be a easy ad-hoc test to gently left foot the brake pedal while right foot on the accelerator, take the TCC out of circuit...
  24. Road Trip

    305 Is a Turd Correct?

    EDIT: Reply collision with #13. We're in violent agreement, so I'm leaving it in here. :0) **** Having said all of the above in reply #10, I would take all the lessons learned in that video and apply that to a 383. In heavy vehicles like the GMT400s, the most affordable path to an improved...
  25. Road Trip

    Hooked up battery backwards

    Check ALL the fuses. Keep track of (as in written notes) which of the fuses were blown. After replacing those fuses, these are the circuits that should receive the closest scrutiny. (ie: verifying at the end of those circuits that power has been restored.) By the way, here are a few...

Latest posts

Members online

... and 1 more.
Total: 881 (members: 51, guests: 830)

Forum statistics

Threads
64,730
Messages
1,399,551
Members
52,310
Latest member
Os-mark683

Share this page

Top