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  1. Bextreme04

    1987 Burb TBI to carb swap

    Have you ever actually seen that? I'm pulling through an EP381 and haven't had any vapor lock issues. The design of the pump shouldn't cause there to be much restriction to pulling through it. Alternatively, you can just keep the in-tank pump and electric pump and run an adjustable regulator...
  2. Bextreme04

    1987 Burb TBI to carb swap

    I can't fathom why anyone would ever want to do this... it has zero benefit and is going to be an absolute nightmare. That being said, you are making this way harder than it needs to be. You don't need to swap anything in the fuel tank. An 87 350 should have a mechanical fuel pump boss, so you...
  3. Bextreme04

    Is this the right radiator?

    The CS130 doesn't put out more power while driving though. It just has a better low RPM power output than both the 10SI and 12SI. Although with the 3:1 pulley advantage, most engines are spinning the alternator at about 1800-2100 rpm at idle, which has the 94 amp 12si producing about 50amps at...
  4. Bextreme04

    What have you done to your square lately??

    Honestly I don't even give them the option to be confused anymore. I look up the parts myself online. I know before I go to the store if they have it in stock, and if not I can just call it in for them to order it ahead of time without wasting time driving in to tell them what part to order.
  5. Bextreme04

    New edelbrock 1406

    Yes, that is correct. However, the pressure being that high could cause the needle to stick open at any point and cause it to randomly start flooding and running terrible. You should be able to tune it and dial it in correctly if the previously stated conditions are met that show it isn't...
  6. Bextreme04

    Is this the right radiator?

    I don't see any 10si options on rockauto. They are showing 12SI or CS130 for the 5.7, not sure why they had both options in 87 V10's. They show ONLY the 12SI for the V30 with 454. I wonder what determined whether you got the 2 pin or 4 pin alternator harness?
  7. Bextreme04

    Is this the right radiator?

    What is different on the wiring harness for an 87 alternator? That looks like a 94amp 12SI that would have been stock on a late 80's 454. I just swapped one into my 1980 350 since I added dual electric fans and some other accessories. It was a direct swap since they are all three wire...
  8. Bextreme04

    New edelbrock 1406

    Setting idle using lean of peak A/F ratio works fairly well. You will know if the fuel pressure is blowing fuel past the needle and seat when you go to set the idle mixture and can't find the peak. Basically you will screw the idle mixture screws all the way in and it won't die, this is because...
  9. Bextreme04

    New edelbrock 1406

    8psi is way too much for an edelbrock. Take a look down the primaries while its running and see if you are getting fuel dripping into the throat. Do you have a wideband or other way to tune the carb? They are usable out of the box usually, which is why people like them. But they will almost...
  10. Bextreme04

    Correct Driveshaft Length for 700-R4/NP208/14bolt FF

    Conversion U-joints have one style of joint on one side and another style on the other side. For instance, one pair might be 1310 while the other set is 1350. FWIW, the slip yolk on the 1997 K2500 454/4L80e/NP241 donor for my swap was identical to the original 350/TH400/NP205 driveshaft slip...
  11. Bextreme04

    Alphabet soup in glovebox

    Pics help. Most RPO codes are listed in the vehicle information kit here: https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Chevrolet-Trucks/1987-Chevrolet-Truck.pdf List of options with the option codes are listed starting on page 84.
  12. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    That's what set the 42 code then. You need to reset the computer after you do that to clear the code. As GMbellew said, you wont do anything with the "shorted" wire you keep referencing. Is it actually shorted to something, or just folded over on itself and taped up to prevent it from shorting...
  13. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    :happy175:
  14. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    That is all wrong. The computer controls the timing. You have to disconnect the wire(NOT the one you have been asking about, but the tan/blk wire coming from the distributor that is labeled as "set timing connector" on the first screenshot that GMbellew posted) and then set the timing. Then you...
  15. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    Tape isn't going to work very well to fix a leak. Either go get the $4 worth of new tubing or just cut the rotted section off and stick the connector back on for now. Then I would go get the correct tubing and replace ALL of the vaccuum hoses, since at least some of them are looking like that. I...
  16. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    Code 42 is also the code that shows up when you short the ESC to set base timing. Did you do that also? If so, you should just reset the codes and see if it returns. Based on the wiring diagrams, that wire might be the Tach output. Do you have a Tach?
  17. Bextreme04

    Got a code42 from ALDL on 87 Chevy 350

    You should not be adjusting the idle stop screw to raise idle. The is an IAC adjustment procedure and you are supposed to disconnect the IAC valve and then manually adjust that screw to a achieve a certain engine idle RPM. The TBI should then be controlling the IAC valve to get the correct idle...
  18. Bextreme04

    '76 K1500 NP203 to NP205 swap

    If you mean that the 205 has the adapter and shift lever on it now, you shouldn't have to do anything else. I would rebuild the 205 front driveshaft with new u-joints and new CV guts and then put the entire adapter/205/shifter/crossmember/front driveshaft in your current truck. The rear...
  19. Bextreme04

    '76 K1500 NP203 to NP205 swap

    It depends on what else you got with the NP205 and what its original application was. If I'm reading this right, the 205 came off a 400/TH350? What is the truck you are putting it in? Is it also a 400/TH350? Did you get the adapter and shifter with the 205? They don't have the same shifter...
  20. Bextreme04

    Another. What rear end is this?

    We can go round and round on what it "might" be. It has the square case lugs on the bottom of the pumpkin like an 8.5".. but the easiest way would be to wire wheel the crud off the top of the passenger side axle tube and read the stamped numbers on there. The first three letters in the stamping...
  21. Bextreme04

    Another. What rear end is this?

    In that year it should be either a 7.5" 10 bolt or a 12 bolt. Looks like a chitty 7.5" 10 bolt to me.
  22. Bextreme04

    Why won't my TBI 350 run right??

    It sounds like you have a few things going on there. It sounds and acts like you have a massive vacuum leak. I would suggest getting a can of something flammable like brake or carb cleaner and spray it around to see if you get a sudden surge in RPM or a smoothing out when you spray a certain...
  23. Bextreme04

    Anybody know how to clean this?

    The yellow can of easy off oven cleaner is what you want. Its the heavy duty version and can be gotten at most home improvement stores and sometimes at big box grocery stores. I'd spray it, let it soak, wash it off, then scrape the thicker areas, then braided wire wheel on a grinder, then one...
  24. Bextreme04

    I broke my new truck

    As noted by others, when I had this exact issue it was a bad ground in one of the parking light connectors. When headlights were on it would bleed into the turn signal circuit. When it is really bad, you will get a turn signal that will start out flashing normal speed, then it starts slowing...
  25. Bextreme04

    Don’t think this is normal☹️

    What is a CK 20? A C20 is a 2wd, a K20 is 4wd... there is no such thing as a CK, since it cant be 2wd and 4wd at the same time. Was it a C20 that has been converted to 4wd?

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