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  1. Y

    Radiator fan direction

    Also when rotating it should blow air towards the engine, sucking through the radiator. It should be pretty easy to tell based on the rotation and angle of the blades, but don't tell that to the previous owners of my 1989 who had it blowing the wrong way.....
  2. Y

    1987 Silverado fuel issue

    Ahh that could explain the confusion then - I have the big block. It definately is the oil sensor/switch (3 wires, 1 to gauge 2 for fuel pump backup).
  3. Y

    ‘87 454 TBI, NO Fuel spray, HAS fuel pressure, has 12v @ injectors, has spark

    Where did you get the device (and roughly how much was it if you don't mind saying since I kind of need one too)??? If you're not getting readings at all, I'd hazard a guess that your ECU is either not powering on or is experiencing a problem. The ECU itself lives behind the glovebox - I would...
  4. Y

    Parasitic draw

    Yes - my friend Dave had that happening on his 1987 C30. If there is a miswiring that keeps the exciter circuit live, that can cause it to happen even with a perfectly functioning alternator. A bad diode in an otherwise working alternator could do it too - it will charge perfectly fine but...
  5. Y

    Can the heater core be turned off?

    Thats pretty much what I needed to know and thanks for the prompt responses. If it didn't have a control valve by design, probably not wise to install one. I'll just do the hose coupling trick for now and maybe try to do something more elaborate next year when I'm past heater season again (and...
  6. Y

    Can the heater core be turned off?

    A lot of vehicles have a valve to control the flow of hot water through the heater core, whereas the the squarebody vintage trucks don't. I am wondering if that could be added because down here it gets way too hot in the summertime, and even with the controls set to vent I get air much hotter...
  7. Y

    1987 Silverado fuel issue

    They seem to just stick it wherever they want. My 1989 Suburban has it on the engine block itself just behind the power steering pump.
  8. Y

    Modern center console rear a/c and heat

    The rear air in the squarebody Suburbans was all the way back in the cargo area above the tailgate/rear doors and uses a secondary evaporator with high pressure lines plumbed under the vehicle back up to the engine bay compressor, so that system wouldn't be much help for doing a modern...
  9. Y

    ‘87 454 TBI, NO Fuel spray, HAS fuel pressure, has 12v @ injectors, has spark

    I wonder if someone got tired of seeing it on all the time (or was attempting to get thru an inspection/sale) and just yanked it. See if you have a suspicious looking empty bulb holder swinging around loose up in there somewhere. Or some cut wires that go nowhere. A small mirror helps. I know...
  10. Y

    ‘87 454 TBI, NO Fuel spray, HAS fuel pressure, has 12v @ injectors, has spark

    Usually when the ICM module goes bad you lose both spark and injector pulse - if it runs off of starting fluid/bit of gas dribbled into the TB then you can rule out the pickup in the distributor and probably the ICM as the problem. The way the injectors work is they have +12 on them...
  11. Y

    Brake light keeps going out

    A bad ground can be confusing - what will sometimes happen (my friend Dave's 1987 Chevy did this one) will be if the ground is bad, current will partically flow back through the other filiment and make it seem like its working - you press the brake and it comes on, turn on the lights and it...
  12. Y

    Parasitic draw

    I like that shunt - where did you get it? I have used an antique DC ammeter to hunt down phantom draws in British cars (it is a relic from my grandfather which he used back when houses were fed with DC current - measures up to 300 amps) - that shunt and a modern digital meter would be a lot...
  13. Y

    1987 454 TBI down on power, runs good otherwise

    From what I can tell on mine the injectors aren't a low-high configuration. both spray more with increasing throttle when you observe them - but that question does bring up a possibility. If only ONE of them is working (or one working well one marginal), that could explain the low-throttle...
  14. Y

    1987 Suburban BUCKET seats inner 3-pt buckle floor mount location?

    Mine keep flopping down between the seat and console as well - hadn't considered the absolute perfection of the zip-tie for that particular application but its now on my to-do list next time I have the cover off the big beast.
  15. Y

    86 Suburban 2nd row shouldber belts

    Not sure about aftermarket sets but if you can find an 87-90 vehicle in a boneyard grabbing them shouldn't be too hard (as long as your truck already has the hardpoints to mount them up on). Or fine someone turning an 87-90 Suburban into a ranch/hunting rig with the rear seats removed and see...
  16. Y

    Oil Leak Into Cab

    I had a 1992 Escort (essentially a rebadged Mazda) that had the speedo cable wicking oil into the panel and down onto my leg problem once. Never seen anything like that before. And of course anything British just leaks oil as a matter of principle. My current 1970 British project drips oil on...
  17. Y

    Disconnected mystery wire in 1982 C10

    I usually try to do it that way (unless its a "side of the road get it home" repair) - if the seals on one side are worn to the point of leaking, pretty good odds the other side is pretty close to wearing out as well.
  18. Y

    Stumped on oil leak

    My friend Dave had this happen on his SBC truck - it was substantial blow-by pressurizing the lower crankcase - on his truck you'd rev it and the dipstick would pop about halfway out. It also contributed to a lot of other oil leaks because the front and rear main seals are not designed to...
  19. Y

    Power only comes on intermittently

    I havn't been advocating (or even intending to advocate) for replacing the fusible links with anything else. Removing them is something I expect the previous owners of my truck would have done based on other things I've found, so I wanted to clarify not only their purpose but also the use case...
  20. Y

    Carb at high alt

    My 454 with the factory style fan clutch and shroud runs down the highway all day long staying nice and cool, only time I start seeing the temp needle creep up is in traffic. It used to get REALLY hot until I realized someone had put the incorrect fan on (it was a factory correct fan but for an...
  21. Y

    Power only comes on intermittently

    OK that actually is an explaination that I can comprehend the concept of. With all the other electrical gremlins I've encountered in my truck, I would not be surprised to find some of the links bypassed or removed. Do any of the manuals have a comprehensive list of which circuits have fusible...
  22. Y

    Power only comes on intermittently

    I don't know - but I would love to understand the reasoning about why just using an inline fuse won't work (seems like the concept is the same, too much current and it pops protecting from fire).
  23. Y

    What’s the solution to this?? Idle adjustor

    I downloaded and read the manual for that Innova3170 which Autozone offers, and according to its instructions it only retrieves the codes on GM vehicles, it doesn't seem to have live monitoring capability so that might not be overly useful since the codes are easily available through the SES...
  24. Y

    part ID & smog pump removal

    At this point my main curiousity is involving the 454 TBI adaptor. If there really is a standard Q-jet intake under there, and you remove the adaptor - what are coolant lines for and how do you reroute them? Not cutting/modifying the fuel lines or wiring is certainly a plus, in case returning...
  25. Y

    What’s the solution to this?? Idle adjustor

    Will that Innova one from Autozone read the live data from OBD-1 or just the error codes? The RedRiver bluetooth option looks really nice but since its listed as an "LLC" I'm expecting it to be an overseas purchase so that might not work. I've seen the various units at Autozone but always...

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