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  1. CorvairGeek

    Anyone Seen a Smoking ECM Before?

    Excellent idea on voltage. Alternators can also fail and put out AC along with DC, but they are typically noisy and very hot when this happens. I can tell you from experience that the power windows are really fast with 16+ volts too! That looks like it should plug into one of the A.I.R. valves...
  2. CorvairGeek

    Anyone Seen a Smoking ECM Before?

    While I'm the first to be suspect of a remanufactured ECM, this is sounding a little suspicious. Service Engine Soon light and any codes? The correct procedure before replacing an ECM (according to the shop manual) would be to check each pin for abnormal connection to power or ground that could...
  3. CorvairGeek

    Anyone Seen a Smoking ECM Before?

    I can't say I'm surprised, with the caliber of 'remanufactured' electronics, especially as obsolete as anything related to a vehicle with carburetion. They are so old now the electrolytic capacitors are due to fail too (probably all that is replaced in some remans). I recently (within the last 2...
  4. CorvairGeek

    Steering Column Questions

    That is positively from the cruise switch.
  5. CorvairGeek

    No clue what these are...

    You have the two position, mixture control valve (different than the solenoid with full computer control - they are blue) circled. It defaults rich when inop, IIRC. I would probably hook it up if it was mine, but you probably won't be able to tell a difference.
  6. CorvairGeek

    No clue what these are...

    It appears the one on the right is for the TCC. http://www.rockauto.com/en/catalog/chevrolet,1985,k10+pickup,5.0l+305cid+v8,1300105,electrical-switch+&+relay,auto+trans+lock-up+torque+converter+switch,4548 I was walking the junkyard today and thought sure I would find an example for you. All I...
  7. CorvairGeek

    No clue what these are...

    You have the two position, mixture control valve (different than the solenoid with full computer control - they are blue) circled. It defaults rich when inop, IIRC. I would probably hook it up if it was mine, but you probably won't be able to tell a difference. It appears you have a different...
  8. CorvairGeek

    No clue what these are...

    Tip In switch for the mixture control valve in the Quadrajet. I was thinking TCC switch for the other, but that can't be with a Turbo 400, so it must be a 700R4. They would both had vacuum lines originally. Choke pull off gets full vacuum less than an inch from it. Front of the carb towards...
  9. CorvairGeek

    A/C compressor

    I would not use that compressor as-is either. It will not have the later, double lip seal on the main shaft. This seal did not appear until the late 90s. The good news is that it can be installed in all R4 and A6s.
  10. CorvairGeek

    A/C compressor

    Exactly, I may still do that too myself. I really don't like V belts anymore.
  11. CorvairGeek

    A/C compressor

    The evolution of the compressor names / parts division is kind of convoluted, and Delphi is no longer a wholly owned part of GM. All the Harrison division compressors are labeled Frigidaire from 1955 to the mid to late 70s. The Delco Air label is on the compressors through '82 IIRC. Harrison is...
  12. CorvairGeek

    A/C compressor

    The clutch assemblies can be swapped between serpentine and V-belt clutches on the later, light weight R4s, not the early style like this one; I wanted one of the last Delphi R4 compressors (GM sold the rights, all are now made by Compressor Works of TX, no matter what name is on them) to...
  13. CorvairGeek

    R4 Compressor Troubles

    I've found the sudden body leaks around the perimeter to be very obvious and wet, just like you were looking for. The main shaft seal leaks can be sudden without much to make them obvious, or they can be oily to very oily and seem to hold refrigerant for years too. Even GM said in the shop...
  14. CorvairGeek

    R4 Compressor Troubles

    Unfortunately, a fairly rapid refrigerant loss out the shaft seal or a o-ring body leak on the R4 are all too common. The good news is that the replacement double lip, shaft seal does a better job than the original single lip or ceramic (pre mid '84) seals ever did. I personally think a body...
  15. CorvairGeek

    Mystery Gauge Wire

    That looks like a fiber optic cable to light some small item, like a switch or indicator.
  16. CorvairGeek

    "generator" light stays on while engine is running....

    Disconnecting the battery in operation is supposed to be a no-no. Damages the alternator with the sudden loss of the battery in an attempt to bring the voltage back up.
  17. CorvairGeek

    "generator" light stays on while engine is running....

    This sounds completely inop, not at all like I was expecting
  18. CorvairGeek

    "generator" light stays on while engine is running....

    Unfortunately, this is a common type of failure on this series alternator. It cannot charging at its full 63-78 amp rating due to a failure in the rectifier (IIRC). It is still charging, as long at the light isn't on at full brightness when running. You may even see it dim more, or even go out...
  19. CorvairGeek

    TBI harness swap

  20. CorvairGeek

    Police Auxiliary Gauge Wiring Question

    That sounds correct. IIRC, some of the GM terminal ends (if you have the 9C1 harness) were designed for both the 'spade' style connector and a little cut out to slip over the 'button' style sending unit, so the same harness can be used with or without gauges. I do have a spade style connector...
  21. CorvairGeek

    Worth it to rebuild A/C?

    If you are serious about it and want it to be reliable, buy only a new 'R4' compressor or change over to an aftermarket design, i.e. Sanden (will require custom lines/hoses). Rebuilt R4s don't have a good reputation (they weren't the greatest when they were new either). You will end up spending...
  22. CorvairGeek

    Security Options for Older Vehicles

    It didn't start off as a goal, but I ended up with the GM Content Theft System when I added the key less entry. If you lock the doors with the remote while the door is opened, it has to be unlocked with the remote, or the lights flash and horn sounds...
  23. CorvairGeek

    Water pump failure destroys radiator

    If he is still running the stock CS130 as equipped (IIRC), they are on borrowed time brand new, without electric fans. The performance at idle would be very poor.
  24. CorvairGeek

    Water pump failure destroys radiator

    x3 The fans themselves can come apart with catastrophic results.
  25. CorvairGeek

    Water pump failure destroys radiator

    Definitely added load with the spacer, but not unheard of either with all the junk on the market. Hub fell off a 22 month old pump with 20K miles (I still had the box). Obviously not much of a press fit, you could see a bonding compound on the shaft. 'No load' compared to having a mechanical...

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