Search results

  1. 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...
  2. 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...
  3. 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....
  4. Y

    1987 Silverado fuel issue

    Isn't that just basic percussive maintainence procedure?
  5. 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...
  6. 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...
  7. 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.
  8. 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...
  9. 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...
  10. 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.
  11. 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...
  12. 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...
  13. 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...
  14. 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....
  15. 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...
  16. 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...
  17. Y

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

    Well I just got my claims-to-be-remanufactured ECM about 3 hours ago, I'm certainly going to try this first and see if it solves my issues because it would be the most seamless method. If not then we go deeper down the rabbit hole (and deeper in the hole money-wise as well). An assembled...
  18. Y

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

    MegaSquirt looks like quite a neat solution - only problem is I'm not sure who I could hire to assemble the thing since it apparently comes as a bare PC board and a million loose components (some assembly required, batteries not included, not suitable for children under 12 without adult...
  19. Y

    General Motor Swap Questions

    Only thing I'd add (having done engine swaps but not specifically Chevy) is be prepared to deal with broken bolts and studs - may be less problematic since you're swapping engines but things like exhaust manifold bolts invariable break on removal - you'll probably need (or at least want to have...
  20. Y

    87 V10 TBI to EFI upgrade

    Related question: If a Sniper setup requires that much more pressure, will it require also changing all the lines from the tank to the engine compartment as well (along with the frame-rail mounted filter) to handle the higher pressure? Or can just the pump be changed?
  21. Y

    Good parts

    I have had decent luck with NAPA - RockAuto is good if you know EXACTLY what you need down to every little possible subvarient, but if you are confronted with 2 or 3 possibilities and guess wrong - you're pretty much stuck with it because there is no way to ever contact someone for help (which...
  22. Y

    Factory power steering cooler? 1991 Suburba

    I have that setup on my 1989 R2500 - it has the optional oil cooler in front of the rad as well but no external trans cooler (just the heat transfer coil in the radiator tank). So far its hanging on OK - my oil cooler was broken away from all the original brackets and cheerfully zip-tied in...
  23. Y

    Should my TBI's fuel pressure act like this?

    Having played a lot with this part of the system recently, I'm wondering if what you're seeing is the fuel pump relay switching off while cranking, but then it starts after a couple seconds because the oil pressure switch is forcing the fuel pump back on once pressure builds. Try...
  24. Y

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

    I wonder if we just discovered the problem: That link is for an 1228747 unit, my truck seems to have (upon visual inspection) a 1227747 unit. Did someone swap in the wrong ECU??? Is there any way to determine which ECU I am supposed to have?
  25. Y

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

    Havn't been able to get back to this for a bit - life intervenes..... How do I find these 1320 electronics people? They don't seem to have a web site, their YouTube channel has 5 videos posted a decade ago and no contact info. I think its pretty clear I need this kind of tool if I want to try...

Latest posts

Forum statistics

Threads
44,414
Posts
956,951
Members
36,735
Latest member
rljohnson013
Top