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    ‘91 Suburban A/C Cooling Help

    My A/C never worked all that well - I'm thinking the parallel condensor might be in my future if I can get it running reliabily again. I have gauges but only a small passing knowledge of what I'm seeing. Finding that person with years of experience on these older systems is becoming rare - I...
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    Ignition switch upgrade

    I'm going to get more involved with it if and when I can get the column out, it will be a lot easier out on the bench. Its a lower priority right now though since I need to be able to reliably drive the truck before worrying about someone stealing it...
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    Ignition switch upgrade

    My Suburban has a similar version of this (installed by previous owner) and overall I think its a good idea. I had an aqquaintance who had a similar year Suburban stolen, they pawned all his tools, picked up strippers and then intentionally punched it into a tree or pole completely totalling...
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    Now we move into desperation territory (seeking advice)...

    Fuel pump relay has been replaced. I swapped it as an outside chance it could be causing an excess electrical draw/voltage sag. I'm not losing the fuel pump itself (I even jumpered the oil pressure switch to force an always-on state and still had it shut down). When it went into the second...
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    1990 Suburban oil pressure gauge only reads 30 PSI

    Possibly - I bought and was planning on putting in a 3 gauge "A" pillar housing with Autometer tach, temp and oil pressure but unfortunately the person who was helping me with that passed away so it sitting in the house...I don't know what happened to the actual sending units that went with it...
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    1990 Suburban oil pressure gauge only reads 30 PSI

    My oil pressure gauge (1989 Suburban) does give variable readings but I always wonder if it is telling the truth or not...I've seen it fluxuate between 30 and 45 while cruising down the highway at steady speed and unchanging temperature, sometimes see up to 40 at idle and then lower to around 30...
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    Now we move into desperation territory (seeking advice)...

    Yes - the distributor itself is brand new (the pickup coil on the orig one did go bad), and it came with a brand new module/cap/rotor installed. When the problem started I changed the module again, also with no change in results. When the pickup coil went bad, the whole fuel and ignition...
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    ‘91 Suburban A/C Cooling Help

    With real coolant I don't expect it would do any harm - I've found radiators in the scrapyard that were still clean inside after years as long as they had actual coolant (for corrosion inhibitition). I'd be worried about galvanic actions of using valves that may not be the right metallurgy - I...
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    Now we move into desperation territory (seeking advice)...

    Good call to check on that, but I have already replaced the TPS thinking it might have been related to the lean run condition that sometimes pops up. Did not make any change so I'm keeping the old one as a "probably good" spare...
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    ‘91 Suburban A/C Cooling Help

    When I was rummaging around under there (trying to get ECU part numbers) it appeared as though the blend door (at least on my 1989) is operated by cable - and the diverters that send the air either to the degoggers, chest-level vents or floor vents are vacuum operated. My blend door most...
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    Now we move into desperation territory (seeking advice)...

    I'm not looking to do any kind of performance tuning or anything - its a stock engine with no upgrades or mods, but the idea of having something with actual readout ability would certainly be nice. Can you tell me any more about this?
  12. Y

    Now we move into desperation territory (seeking advice)...

    Transmission is a TH400. Engine is a 454 all factory (no headers/uprated heads/hot cam or whatever). I get an intermittant 44-Lean error which should not make it randomly stop running. I have reworked all the grounds I can find, including adding an extra one to go between the coil bracket on...
  13. Y

    Now we move into desperation territory (seeking advice)...

    I still have not found my phantom (or demon more accurately) electronics problem causing random shutoffs and/or extreme running issues. Without some sort of extremely elaborate test rig, I can't truly test the wiring under all conditions....sitting at home in the driveway with basic DVM...
  14. Y

    I hate the power window and door lock switches

    I always prefer to use proper tools when available - I have not seen one of these "ratchet" crimping tools - I assume it uses some sort of arcane laws of physics to increase the mechanical advantage? I'm also going to assume its not something one can get at the local Harbor Freight or Autozone?
  15. Y

    I hate the power window and door lock switches

    My original door switches had fallen apart when I got the truck, along with the connector. I've got the Dorman ones that Rock Auto sells, but they are not holding up for me. I've considered a custom panel with center-off toggles, I'd like ones that return to off when released so theres no risk...
  16. Y

    I hate the power window and door lock switches

    I used to work for the phone company and that was still (at the time) a commonly used technique. It works better with solid core wire than stranded though, stranded doesn't tend to hold the shape of the wrap arounds very well....
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    I hate the power window and door lock switches

    I have bad luck with crimps so I tend to go for the solder+shrinkwrap approach. A good crimp is every bit as solid and reliable (and really better from a vibration perspective) - I just do not have the hand strength to get the kind of crimp you'd get at the factory and the handles on the tool...
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    Beginner Alternator Question

    Before junking the alternator, I'd check to make sure the exciter wire is in fact exciting the windings. From personal experience, this is a real possibility. I had mine go to a no-charge situation after replacing the distributor. It turns out whoever owned this truck before me (who should...
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    Cold air at my feet and not to much in my face. Also no defrost...WTF

    I had the same problem when I first got mine so I'm betting on the vacuum line to be the issue. The hard plastic vacuum line had broken right where it goes into the firewall from the engine compartment - there was enough of a stub to sneak a small rubber vauum hose onto and make the connection...
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    TBI symptoms changed (new thread to reflect new problems)

    I like those top creepers - my friend Dave had one but I didn't try to buy it from the estate. It wouldn't have helped me all that much since I only have a mud/dirt driveway (no paved parking area or actual garage) to work on, but on a smooth hard surface it was ideal. I may try your...
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    TBI symptoms changed (new thread to reflect new problems)

    I assume doing this experiment will require disconnecting the 4 pin module connector at the distributor AND the 2 very large connectors on the ECU itself? It will probably be a week or so before I can dig into this but I am certainly saving these suggestions and information to use the next time...
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    TBI symptoms changed (new thread to reflect new problems)

    I think you are correct on this one - and after dealing with British electricals for years I have learned to always question the grounds and never directly trust the body to be a good ground (or a trailer frame, especially a boat trailer). I'm out of my territory so to speak on this one...
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    TBI symptoms changed (new thread to reflect new problems)

    I do have another unused new cap that I can swap on in place of the one that came with the distributor. Since it was well after dark when I got home I was able to open the engine compartment and look for any arcing on the high-voltage plug/coil wires. Did not see any but that doesn't always...
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    TBI symptoms changed (new thread to reflect new problems)

    I started a new thread because the previous one where we were trying to solve random shut-offs may no longer be relevant... Over the weekend I had an out of town music job which meant I needed to run the 1989 Suburban out there (about 70 miles each way). After replacing the fuel pump relay...
  25. Y

    87' R10 TBI 350 shuts off when driving. HeLP

    Obtained!!! Thanks.....

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