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  1. Matt Buffington

    Sulfur smell when letting off the gas

    Thanks for the advice. While it drives well, it does have the feeling of retarded timing....even though it’s set to 0. Over this long weekend, I’ll mess with timing and see what results. You’re a Buffington, too? So cool!
  2. Matt Buffington

    Sulfur smell when letting off the gas

    Hi Gang! Just had true-dual exhaust added to my 1990 burb, with high-flow cats and flow master mufflers. Truck runs amazing. However, when I let off the gas, I get a sulfur smell in the truck if I have the back window down. I know, simple solution to this is to drive with the window up! But I’d...
  3. Matt Buffington

    TBI fuel pump unresponsive

    Another follow up: I wired 12v directly to the fuel pump at the rear of the truck...no whir, no response at all. Looks its been a shot fuel pump the entire time.
  4. Matt Buffington

    TBI fuel pump unresponsive

    Next update: green wire at relay 12v when switched on, so that checks. rechecked power at back to pump; pink wire is 8.5v, white/grey is 12v for about three seconds, then off.... so...i think I was not probing the connectors by the pump correctly before, as I had my wife cycle the truck on...
  5. Matt Buffington

    TBI fuel pump unresponsive

    Update: 12v on orange wire, check! Ground solid: check! Green wire....zero. Should it only read 12v at initial key on/cranking? I was alone and could get to the engine bay fast enough to tell.... checked wiring to oil pressure switch and all looks good; nothing corroded/broken/disconnected...
  6. Matt Buffington

    TBI fuel pump unresponsive

    Thanks buddy; I’ll get into this today and let you know what I find. Has to be some little break or something, as it happened all of a sudden. Oh, and you know what? When I first got under the hood to check out why the truck wouldn’t start, I noticed the fuel pump relay ‘dangling’ and not in its...
  7. Matt Buffington

    TBI fuel pump unresponsive

    Update! I found the fuel pump ground disconnected. Reattached to frame rail, and still nothing. Measured 6.25 v on power line to fuel pump (measured at connector near fuel tank). Replayed fuel pump relay, no difference. It’s raining and dark out now, but tomorrow, I plan to attack this again...
  8. Matt Buffington

    TBI fuel pump unresponsive

    Hello! Okay, found the fuel pump ground disconnected!!! However, for the life of me, I cannot figure out where it was connected....and I'd rather not drill another hole in the frame. There must be a logical place for this to go. Any ideas?
  9. Matt Buffington

    TBI fuel pump unresponsive

    Hi gang, Been chasing down a crank-no-fire situation on my 1990 burb (350 stock TBI). After running around 50 miles or so around town one day (running perfectly, as far as I can tell), she would not start when I came out of the supermarket...just cranks away, but no firing! I can get the...
  10. Matt Buffington

    Secondary battery and isolator install complete!

    Great to catch up on this thread. My secondary battery and isolator are working as planned. Just added a gang buss 8 distribution box and controller on the inside of the truck. I even found a new ‘portal’ through the firewall that I never saw reported anywhere on the internets! Just below the...
  11. Matt Buffington

    brake pedal rattle

    Thanks a ton...or, a 1/2 ton! The OER number above....that’s for summit?
  12. Matt Buffington

    brake pedal rattle

    Awesome, both posts are super useful! Now that I have something to actually look for, next time I’m under the dash i’ll Check it out.
  13. Matt Buffington

    brake pedal rattle

    Hi folks! My brake pedal rattles back and forth in the cab when I'm not pressing on it. Seems like a bushing is eroded/gone, but I can't for the life of me find anything about this. Does anyone have suggestions on what I can look for, or what the cure for the problem is? Thanks in advance!
  14. Matt Buffington

    TBI pods are leaking!

    thanks everyone for the comments. Your support really lifts my spirits! I tried ATF to lube the o-rings prior to install. That seemed to be the go-to solution. I think perhaps the petroleum jelly is next up to try. And something else: when I first reinstalled new o-rings, the truck ran...
  15. Matt Buffington

    TBI pods are leaking!

    Got more o-rings on their way, arriving Mon. i think I'll order a set of injectors, too, that I can return if it turns out mine are okay.
  16. Matt Buffington

    TBI pods are leaking!

    now I swapped the injector position, and the leak 'followed' from the DS of the pod to the PS of the pod. Seems like there is something up with that injector unit. Any ideas? How do these leak in the first place?
  17. Matt Buffington

    TBI pods are leaking!

    Took the whole thing apart again....and used the original o-ring prior to rebuild, as its now in the 'best' condition of all the rings I have! Still leaked, of course. Next up is to swap the injectors and see if the leak 'moves' to the new location. If it does, I presume the injector is bad...
  18. Matt Buffington

    TBI pods are leaking!

    Just back from my inspection, and the second new set of o-rings are completely ripped/torn. Fuel leaking from top of DS when at idle. At this point, I have concluded 1) the o-rings I have are the wrong size and/or 2) when I am inserting them, I am destroying the o-ring in the process. I'm now...
  19. Matt Buffington

    TBI pods are leaking!

    Will do. I don't think I am seating them correctly. Your comment on the weak spring makes sense. I had my logic backwards!
  20. Matt Buffington

    TBI pods are leaking!

    Thanks. My guess is that I put the injectors in wrong again....i’ll take it apart today and see what’s up.
  21. Matt Buffington

    TBI pods are leaking!

    hi folks, After my TBI rebuild, I’ve been plagued by leaking injectors in the pods. The file appears out of the top of the inject, then dribbles down. My first examination revealed the new upper o-rings were shot! I ordered new ones, and realized that the first set were not lubed when I...
  22. Matt Buffington

    TBI rebuild completed!

    Hi everyone, Happy Monday! I successfully rebuilt the TBI on our 1990 suburban over the weekend! Wow, what a difference. I recommend do this for anyone with a TBI that's running a little wonky. It's not hard, and not expensive. Plenty of great demos on youtube, etc. A couple things came...
  23. Matt Buffington

    Secondary battery and isolator install complete!

    Hi Gang! An update on my 1990 Burb secondary battery install. Everything works now after installing a Cole-Hersey solenoid that splits the circuit from the starter battery secondary battery. The original solenoid was closed all the time, and so the secondary battery was engaged during...
  24. Matt Buffington

    Post a picture of your Rim & Tire

    Here's mine. If anyone has an 'extra' one of these, please let me know! I'm looking for a 5th rim for my spare!
  25. Matt Buffington

    New member....dual battery question!

    Thanks Craig. I studied that thread for some time, and I think I am getting it now. Once I get a new solenoid, and new fuses, and I rewire everything, I'll write up a summary post of what I did, and what I did not, so we can record all this for other members! Matt

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