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  1. J

    AC compressor pressure switch, single pin?

    Do you have a part number? I found ACDelco 15-5687, but I cannot find any specs as to the PSI.
  2. J

    AC compressor pressure switch, single pin?

    Where did you install the high-pressure switch?
  3. J

    AC compressor pressure switch, single pin?

    Thank for all your replies. For the question about the snap ring, I did remove it, the plastic just fell apart. As for the recirculation button, you are correct that I do not have one. If I don't need to hook it up, I will just get rid of it. My truck is black and is always hot. When I'm...
  4. J

    AC compressor pressure switch, single pin?

    1990 K2500 7200 5.7 4x4 I decided to replace and fix my AC. I replaced everything. Condenser, evaporator, dryer, orifice tube, and the compressor. I had replaced the lines 5 years ago, so they still were good. The compressor I got: FOUR SEASONS 57237...
  5. J

    Delete Oil Cooler lines?

    Here's the new, new link. I hate that they keep breaking. I had this bookmarked and saved on the site, then they change the site and I lost all my saved forums. I did this mod and it worked great. I forgot how I did it, hence I was looking for it again...
  6. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Here's a follow up question. Should I redo the timing first then set the rmp's on the tbi, or set the rmps on the tbi and then redo the timing?
  7. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    I replaced the manifold and it fixed my problem. It run so smooth now, its weird. I learned that back pressure on the exhaust is more important that I ever knew. I now have to figure out how to use my meter and the amprobe to set the rpm on the tbi. Thank you to everyone who helped...
  8. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    I don't really know what you are talking about with "MIL" I am just going to guess you are talking about the check engine light. It does work, if I over rev the engine, the light will come on and stay on until I shut the truck off. It will then reset and go away. I do need to get that...
  9. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Well, I like sisters! I will have to try those also, but get the manifold today. I will put it on tomorrow and see if that solve my problem.
  10. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Here are the numbers with the difference in percent Wet Dry % difference Dry Wet % difference 155 155 0% - 137 NA 122 117 4% - 125 NA 130 120 8% - 130 NA 125 113...
  11. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    I just get the one that is 155.
  12. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    So I was thinking about what Schurkey said and I realized I did the compression tests wrong. I realized after I did the 1st 3 wet and I didn't have time to run the truck to burn off the oil to do it over. I am doing this during a family dinner, so I am just uploading a photo of the test...
  13. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Hi Schurkey, What I meant by cranked it 4 times, was I bumped the key to start it 4 times. I am about to head out and do a wet test now. I'm hoping it doesn't change much!
  14. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    So I got the headers today and tried to put one in. They won't work unless I cut the exhaust. I don't need to add more work so I returned them and ordered the manifold. Should have it by Wed. Since I didn't have anything else to do,I did the compression test. Starting on the passenger side...
  15. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Thanks for the info. I found this video helping explain how to do it. I found this pic, thought it might be helpful to the next guy reading searching though the treads. https://www.obd-codes.com/faq/read-gm-2-digit-obd-codes-free.php
  16. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    I do not have an electric fan. I will work on getting all this stuff taken care of and get back to everyone. Thanks for your help.
  17. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    Man, you guys are on this stuff like no other! Thanks for all your help. I have found a couple of different things not plugged in, misc wires without plugs and so forth. I have tried looking through the GM shop manual, but to no avail. At least now, I can look at the wiring diagram and...
  18. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    I can't for the life of me find where it is leaking from the exhaust?! I hope this is really the problem. Thinking about it, I was slowly having problems and as it got worse, the exhaust leak was getting louder. I am hoping this is the problem. So now, I have a new dilemma. I can get a new...
  19. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    No check engine light. The exhaust leak has been going for awhile, I can't say if the problem started when that happened. As for how long, its been at least 8 months. When it started, it wasn't that bad, but it has got progressively worse. Maybe it has to do with the exhaust leak, like you...
  20. J

    1990 K2500 350 5.7 TBI Stalls in reverse or drive

    So I have been creeping around the forum for a while looking to see what I can do to fix my stall problem. I can keep the truck going it I hold the brake down and give it gas, but I need to get this fixed. So here is what I did based on what I have read here on the forums. Set the timing with...

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