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  1. Y

    What’s the solution to this?? Idle adjustor

    Is there any current source to get one of these? Has some sort of copyright/intellectual property dispute made then illegal? The only references I can find are to people or companies that seem to have vanished a decade or more earlier. A tool like that seems vital to really solving issues...
  2. Y

    part ID & smog pump removal

    I'll be checking on that - if I do have that setup I'll be much closer switching to a carb than I expected to be.
  3. Y

    What’s the solution to this?? Idle adjustor

    How you FIND the IAC counts? Mine always wants to idle at about 950, it will start off with a nice low idle and then as you sit at a light it will slowly start to idle up to around 950 and never go back down until you turn off and on again. Someone before me had already removed the cap and...
  4. Y

    87 R20 suburban

    Very accurate. The oil presssure fuel switch serves a a backup for the fuel pump relay, should keep you running even if the relay fails. The fact that you get no fuel to the TBI even after coaxing it to run long enough to build oil pressure says your problem lives elsewhere. Because it does...
  5. Y

    part ID & smog pump removal

    So a factory 1989 454 with TBI should actually have essentially a Q-jet intake with an adaptor plate? That could make my life a lot easier if it comes down to doing a TBI to Q-jet conversion. And that part circled in red is absolutely the vaccum actuator for cruise control. If you REALLY...
  6. Y

    Just advice please

    I'd consider throwing a compression check at it while you have the plugs out. If you're getting low compression or a lot of leakdown on one or more cylinders, that may be an indication of time for a ring job (which would also explain the blow-by).
  7. Y

    87 V10 Custom Deluxe TBI Issues

    Can you provide a little more detail about replacing the smog pump and pipes with a 25K resistor? I'm not familiar with this but it could become relevant to me later (my truck still has all the AIR injection but it could be contributory to my lean fuel error so that might need to change).
  8. Y

    Factory smoke

    Woo hoo! I'm trying to reassemble an MGB - that stuff could be a lifesaver! And its genuine Lucas so you know its been approved by the Prince of Darkness.
  9. Y

    Factory smoke

    Whenever I disconnect/reconnect a battery I always hook up one side then give the other one a very quick tap on the terminal without actually putting it around (for a top post) or screwing it in (for a side post). That way if I see any kind of arc I know something is wrong and its only had a...
  10. Y

    ‘87 454 R20 eye watering exhaust w/ windows down

    I would have expected it to be in the bottom of the speedo, in the left side warning lamp area (but again I have a 1989 so they could have changed it although GM usually kept things pretty consistant). If you can see under the dash, look for a brown wire with white stripe (according to the 1988...
  11. Y

    ‘87 454 R20 eye watering exhaust w/ windows down

    If its a TBI there should be an OBD-1 ECU behind the glovebox (thats where it is on my 1989 Surburban, there doesn't seem to be a lot of major differences between 1987 and 1989 in the ECM systems) and an orange Service Engine Soon light in the speedo. If that doesn't come on when you turn on...
  12. Y

    R12 recharge from high side?

    My concern would be this: Is it really R-12 in that tank? Half full used tank almost sounds to me like it could have been used with a refrigerant recovery machine. If thats the case, it could be a mix of whatever the customers of that shop claimed was in their systems....
  13. Y

    1987 Silverado fuel issue

    Isn't that just basic percussive maintainence procedure?
  14. Y

    1990 Suburban oil pressure gauge only reads 30 PSI

    Did that dedicated ground on the O2 sensor make a notable difference? Asking because I get intermittant (come and go kind of randomly) lean code 44 errors on the SES light, but visually examining a pulled plug doesn't seem to indicate an overly lean burn. I've contemplated doing what you just...
  15. Y

    1987 Silverado fuel issue

    If you're getting that click at 2 seconds, then most likely the ECM is working properly in that aspect. Putting 12V directly onto that red pigtail from the battery should feed 12V right back to the fuel pump - if you're not getting any juice back there, you're not getting pump action period. I...
  16. Y

    Just curious.

    Could also possibly be a failed intake gasket. Since removing the intake is one of the first steps in pulling a head anyway, its a logical place to start before breaking off all exhaust manifold/header bolts to get the head off. If the problem is there, you don't have to go deeper.
  17. Y

    Just curious.

    A valve seal could also be allowing trace amounts of something into the combustion chamber as well - probably on the intake side since it is being pulled into the chamber and then pushed out on the exhaust. That probably wouldn't be revealed on a compression or head gasket test. I know I get...
  18. Y

    Header swap begins.

    Those Whitworth wrenches could be well worth their weight in precious metal in the right setting. I have several peices of vintage British machinery which is surprisingly easy to work on with the right sockets and wrenches, would be an absolute nighmare to fight with trying to use adjustables...
  19. Y

    Narrowing a Square Fleetside Bed

    Only thing I would consider with that would be to narrow the gate by trimming equal amounts off both sides rather than a chunk out of the middle, simply because it you would have a cut/weld seam right down the center of one of the most visible panels otherwise.
  20. Y

    Engine cranks, but only starts after letting off key? - I'm perplexed

    You are chasing similar problems to what I have been experiencing on my 1989 Suburban - not identical though. If you can trigger the problem by tapping on the computer even after replacement, that starts to sound a lot like dodgy connectors. I used to get frequent code 42's - I solved it by...
  21. Y

    1989 suburban AC blow pressure

    An obstruction at the blower input is a possibility, but I'd also check your vacuum operated air doors and ensure they are working correctly, otherwise the air might be blowing great but no idea where it is coming out. On my 89 Suburban the vacuum line from the intake thru the firewall to the...
  22. Y

    Header swap begins.

    I am planning on using that kind of wrap on an MGB to avoid melting the floor mats and seat (the pipe passes under the floor with less than an inch of clearance). Unfortunately there is no Summit outlet near me so I'll have to make do with whatever I can get from the local parts stores...
  23. Y

    European 86 C20 454

    Interior looks very much like mine, but your exterior has a lot more shine. It tooke me 2 full days to polish a small Mazda hatchback, I expect it would take close to a month to polish up something the size of these squarebody Suburbans....
  24. Y

    1990 Suburban oil pressure gauge only reads 30 PSI

    Thats interesting because my 1989 Suburban has the 3 pin combined pressure sensor/switch, but it is installed on the side of the block aft of the PS pump (and as far as I can tell that is the factory location since the wiring harness clearly routes to that location with no signs of...
  25. Y

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

    The Holley isn't really my first choice either - it seems more targeted to the performance upgrade demographic which isn't where I'm looking to go. Its only real appeal to me is the ability to do realtime monitoring which makes troubleshooting more scientific than the limited error code info...

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