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  1. beady

    1987 454 TBI stalls at idle after a short time

    Th400 was rebuilt just before I bought it, so trans was definitely out. Don’t think engine was, but don’t know. Rear AC doesn’t work (yet). I replaced the compressor, condenser, evaporator, dryer. I pulled and flushed rear evaporator and flushed all lines and hoses. I haven’t vacuumed...
  2. beady

    1987 454 TBI stalls at idle after a short time

    Thanks, lol. I figured if I gave good background what I’ve tried it would get better results. The problem has sort of morphed along the way, but have made lots of progress. Mike
  3. beady

    1987 454 TBI stalls at idle after a short time

  4. beady

    1987 454 TBI stalls at idle after a short time

    I went ahead and installed the 3-wire O2 but just rigged up the power to it temporarily. There are more O2 sensor readings now, but it doesn't change a lot. It still populates zero cells in the BLM or INT tables. I don't know why. It does populate the O2 table cells though. I took a short...
  5. beady

    1987 454 TBI stalls at idle after a short time

    I went and drove it while you were posting that to see what happened. I did get a few hundredths change and it populates 3 cells of the O2 table. The truck has what look like aftermarket cast manifolds. The O2 sensor is on the driver side collector, o2 reading only changed when I got on it a...
  6. beady

    1987 454 TBI stalls at idle after a short time

    Sorry, was too damn cold to do anything for seemingly weeks, then I had the flu this week. I bought a new Bosch 12014 single wire O2 sensor (didn’t want to mess with adding other variables with 3-wire, and cheap) and installed it today. Computer not seeing the O2 sensor it seems, reading...
  7. beady

    1987 454 TBI stalls at idle after a short time

    Thanks Bill, that was super helpful info, I really appreciate you taking the time to post those hints. The install went well and the only thing I had to do was change the baud rate to the higher vale (4800?) to get things to work. First issue, the datalogging stops after a short time. Maybe...
  8. beady

    1987 454 TBI stalls at idle after a short time

    That’s super helpful info on the WINALDL, thanks! Cable should be here Thursday it says. It’s one of my son’s old laptops, I think he said windows 7? I need to boot it up and check. Mike
  9. beady

    1987 454 TBI stalls at idle after a short time

    Thanks Bill, Sorry, for the long post below: When I said I don’t need “timing” in that post, I had typed “tuning” and it got autocorrected. For now I just want the easiest software install that isn’t going to give me fits about PC operating system not being the right version, etc. I can...
  10. beady

    1987 454 TBI stalls at idle after a short time

    I ordered a cable. That’s my concern too, that it’s going to be a pita to get working without downloading a bunch of different softwares. I just want the easy button approach. Nothing fancy, no timing, etc., for now, just be able to see live data.
  11. beady

    1987 454 TBI stalls at idle after a short time

    I had an OTC scanner that would show you data. But not graphically, and it got stolen. I ordered an ALDL usb cable yesterday, hopefully I can get it to work. It seems very difficult to find any of the scanners that read ALDL data currently for some reason Previously, I did have a problem...
  12. beady

    1987 454 TBI stalls at idle after a short time

    Well…. I went to check timing (it was about 20 degrees btdc) and I pulled the timing connector wire to check base timing and the engine immediately almost died and started surging. Now it struggles to stay running again, lol. The timing with the wire disconnected is about 4 degrees btdc...
  13. beady

    1987 454 TBI stalls at idle after a short time

    Thanks for that. However, since I complained the truck has been running normally, go figure. I’ve done probably 8 dead cold to operating temp, back to dead cold, including sone errands and turning the engine on and off and it only had one bauble. That was one of the first drives when a dog...
  14. beady

    1987 454 TBI stalls at idle after a short time

    Thanks for the detailed reply. I had a scanner that would give ALDL live data until about a week ago. My son borrowed it for his friend to use, and the kid’s car got broken into and the scanner stolen from his trunk : ( I’m handy with a DMM (love my fluke 179 that has a thermocouple for temp...
  15. beady

    1987 454 TBI stalls at idle after a short time

    MAP sensor is a couple months old, a couple hundred miles old, tops. I haven’t tried spraying starting fluid around intake to check for leaks yet. But it doesn’t have a high idle, and doesn’t hunt either.
  16. beady

    1987 454 TBI stalls at idle after a short time

    Hello again, I have this new to me 1987 454 TBI suburban that I’ve been chasing problems down in. Today’s issue is stalling after a few mins of idling. The previous problem was power being way down, to the point where it would max out at 47 mph and you could only use literally the first 1/4”...
  17. beady

    Thoughts on how to recover from a slightly cross threaded spark plug threads in head?

    To follow up, I used the expanding back tap mentioned above and it worked. I wasn’t able to get either a low profile thread chaser or new plug to start though, so I used the back tap several times. I was able to get it to start even fully expanded, so went ahead and really worked on getting a...
  18. beady

    Thoughts on how to recover from a slightly cross threaded spark plug threads in head?

    I just ordered a regular, tight clearance thread chaser and also a “back tap” which you insert to the good threads, expand, and back out. At least one person had luck on an iron head. Back tap
  19. beady

    Thoughts on how to recover from a slightly cross threaded spark plug threads in head?

    Is that deep enough/has enough clearance to get a socket on that hex and fit into the opening in the head? I thought I read ppl saying those were too large in some cases. I did pick up a 14x1.25 tap this evening, might order a single ended thread chaser before I try the tap though.
  20. beady

    Thoughts on how to recover from a slightly cross threaded spark plug threads in head?

    Was installing a DUI distributor, coil, wires, and plugs. Got distributor and coil installed and old plugs out. Started installing new plugs and hit a snag. 454, #8 rearmost passenger side. Felt like it went in ok a few turns and then I started tightening with a ratchet, but it didn’t feel...
  21. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    just pulled them today actually. Most looked pretty good. A couple were nasty and oily though. They did NOT all look black with soot/running rich though. But…. I cross threaded #8 with the new plug : (. Going to post a new thread asking what my options are.
  22. beady

    ‘87 454 R20 eye watering exhaust w/ windows down

    Thanks, I actually bought a 3-wire o2 sensor for my OBS that had true duals also, but the truck got hit before I installed it. Still have it, should work on this truck. I’ll email him.
  23. beady

    Can you let AC flush sit in lines and hoses and blow it out later?

    So I’m replacing most the the AC stuff in my ‘87 suburban R20 with rear air. Condenser, front evaporator, compressor, dryer, rear expansion valve, etc. Basically everything except lines and rear evaporator currently. I took off the rear expansion valve from the evaporator, and it looks...
  24. beady

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    I ended up using an Adele style clamp from the hardware store. Still not finished with everything, so not sure how it’ll work long term. I have the heater box mostly back in and the cable seems to function correctly.
  25. beady

    Vintage Air Gen V (5) or replace existing compressor, etc., for 1987 R20 Suburban?

    Thanks, good thought.

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