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  1. 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...
  2. CorvairGeek

    TBI harness swap

  3. 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...
  4. 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...
  5. 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...
  6. 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.
  7. CorvairGeek

    Water pump failure destroys radiator

    x3 The fans themselves can come apart with catastrophic results.
  8. 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...
  9. CorvairGeek

    78 round eye

    The water pump rotation changes from '84 to '89 ('V' belt vs. serpentine belt), so keep this in mind if moving things around. No other accessories change rotation direction.
  10. CorvairGeek

    Catalytic Converter Question

    Genrally, the air injected at the manifolds is for open loop operation only (at least the ports upstream from the O2 sensor), primarily for the control of HC and CO after start up. The converter only gets air injection (if so equipped) when the engine is warm. During deceleration, a hot idle, or...
  11. CorvairGeek

    Catalytic Converter Question

    The air injection tube is for three way catalyst, which I don't believe any 49 state squarebodies used (can't say for sure for Cali). The rear bed of 3 way catalyst uses platinum, palladium, and rhodium to break down NOx emissions (besides CO & HC), some applications required more oxygen for the...
  12. CorvairGeek

    What is this plug for

    Looks like the power/ground/dash light connector for a first generation GM 1.5 DIN radio.
  13. CorvairGeek

    no off position on fan control?

    This sounds like a non-A/C truck to have floor vents. The A/C and non-A/C trucks of the era run the fan all the time, even in the off position. Lessens the chance of CO poisoning and is a hold over from the 'Astro Ventilation' era, IMHO.
  14. CorvairGeek

    TH400 bangs into gear

    Turbo 400s are known for intermittent excessively harsh engagement into reverse. A Transgo kit lists it as one of the things it fixes. Mine is actually so far on the gentle side the truck has to roll briefly at times (only a couple feet) to 'feel' fully engaged. Prior to the kit, it would...
  15. CorvairGeek

    Default Any inline6 250 experts need some advice

    Positively not an integral in the picture, they look so different. The Op's looks just like my '78 292. I would love to change my intake to I could put a TBI system on it. I've been looking at building a programming one, but I have to change the intake. Don't want to go with a Clifford because...
  16. CorvairGeek

    250ci 6 Cylinder Emissions Questions.

    It is a deceleration valve, I assume you have a manual transmission. The differential pressure between ported and non ported vacuum causes it to open upon deceleration, which helps prevent fuel from being pulled from the carburetor causing higher HC & CO emissions. The rest of it (in the valve...
  17. CorvairGeek

    Identify this decal

    Definitely aftermarket, but I've never seen it before either. The 4x4 and stripes may be unrelated as well, but someone liked the combination and put them together.
  18. CorvairGeek

    Cruise control arm but no wiper controls

    My '81 tilt column had cruise and no wiper control. I believe the wiper control appears around '84, just like the B-body cars. Keep in mind the coupling at the column to the intermediate shaft changes around 80-81 so I had to use the shaft from the '81. Coupled perfectly at the rag joint when...
  19. CorvairGeek

    Heater core

    Most anything newer makes a squarebody heater core (w or wo/AC) seem easy. Fixing all the other little problems with the air box (w/AC) i.e. seals, actuators, vacuum lines, is a bigger job.
  20. CorvairGeek

    New from europe

    Welcome! Love to see some pictures of your Suburban. US delivered Suburban or European?
  21. CorvairGeek

    Help ID this switch

    Move to the left for a 'mist' position. It will wipe as long as you hold it to the left. One click to the right is intermittent. Rotate the know clockwise to decrease the timed interval, i.e. make the wipers run more. It may not run at all if fully counter-clockwise, and may run all the...
  22. CorvairGeek

    Help! What is this???

    You might want to preemptively grease and replace the center plastic latch/tab. It may already be broken on one side now. It comes completely apart when both tabs break off. They get so brittle with age. http://www.gmsquarebody.com/forum/showthread.php?p=236797#post236797
  23. CorvairGeek

    1.4v at electric choke?

    It is supposed to come on with the key on, engine off (everything intact). If the choke heater fails or is unhooked, it should be on when the engine is running (assuming there is oil pressure). If it is failed/unhooked when the key is on, engine off, I believe the light will be off (failing...
  24. CorvairGeek

    1.4v at electric choke?

    "if i unplug the wire from the choke i get 12.7 volts when the key is ON/Engine off, is it supposed to work like that too"? "I still don't understand why I have 12v with the wire unhooked and very little voltage with it hooked up and engine off for both" If I'm understanding this correctly...
  25. CorvairGeek

    1.4v at electric choke?

    The engine has to be running to close the oil pressure switch to deliver the source voltage (+12v) to the choke heater.

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