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  1. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    It's a holley Terminator, you program the injectors in at the initial startup by either GM PN or by entering the specific injector data. You can also change it at any time later on, then it does an initial learn of the fuel map when you first start it up. If you KNOW you have an injector not...
  2. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    I don't want this to sound like I am hammering on the Holley again... but this is probably not due to all of your injectors being stuck or clogged. This is almost assuredly due to the limitations in how "smart" the holley is. Based on the way it is acting, I bet you have the single O2 sensor...
  3. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    This seems like a huge miss. Only takes a second to check resistance on the injector. Dirty or clogged injectors will almost never cause a complete failure of the injector to fire. It will fire in an odd pattern or too much/too little, but it WILL fire. Trusting the holley harness is also a...
  4. Bextreme04

    Wiring for updated fuel system

    Holley makes the 6 port switching valve and sells it for high pressure. The pollack one is not rated for full 4 bar fuel pressure.
  5. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    You can also see if the injector has failed internally by disconnecting the connector and check resistance between the two terminals. It should have 12-18 Ohms of resistance. If it is less than 12 or open, then the injector is failed internally and likely won't work at all. I would also swap the...
  6. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    Bummer. Did you ring out the Holley harness for the injectors too? Make sure you are moving the harness around while checking the circuit, because you could have a broken wire at the connector that is intermittently making contact. 180psi should be close enough that you know it isn't a bad...
  7. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    Here's the cruise control module and cable that would be stock on a DBC Tahoe. Mounts to the firewall and is completely standalone, just feed it control signals and VSS. They are pretty widely available in junkyards and on ebay...
  8. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    This is the way. One little problem solved at a time. Does the terminator have the inputs for AC active and different cruise control tables? I know the stock one will allow you to adjust additional torque output when AC clutch is engaged to keep the idle from dropping. Same for cruise control...
  9. Bextreme04

    USA1 Dash Pad Troubles

    You might have to do some trimming. They do get their dash pads from Dashes Direct like most others. There will be some mild trimming needed in the corners and around where the gauge bezel mounts.
  10. Bextreme04

    Carpet for K20 bastard

    /\/\ This is what I meant. I knew there was a difference in the type or cut of carpet in the years somewhere. And at some point later in the run everything got the high hump.
  11. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    The reason I brought it up is because you say it runs bad with the new throttle body on there. This LS is a truck engine, so it wouldn't have that big port on the throttle body in the factory set up. The F-body cars and corvettes had that tube to feed the PCV system filtered air after the MAF...
  12. Bextreme04

    Carpet for K20 bastard

    the later 3/4 ans 1 tons are the same basic cab shape, but have the high hump. Just get the carpet for a high hump 73 K20
  13. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    That sucks about the coil harness. I have a few laying around, but that doesn't help you any. As others have said, those throttle bodies will almost always cause more problems than they will fix. You don't need a bigger throttle body. The stock throttle body is plenty big enough to support a...
  14. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    I don't think I would trust anything the previous mechanic did, nor that holley harness is actually correct. You can find their wiring diagram and instructions for the kit with wiring harness here...
  15. Bextreme04

    Intermittent IAC issue 89 V1500

    You can chase your tail forever if you just throw parts at it. Test and verify, then replace parts.#1 cause of people to junk their TBI system is inability to fix it because they have replaced every sensor and it still doesn't work right. Get the manual and run through the troubleshooting...
  16. Bextreme04

    Intermittent IAC issue 89 V1500

    CTS could definitely cause high idle. It will also run pig rich if it thinks it is colder out than it is.
  17. Bextreme04

    Intermittent IAC issue 89 V1500

    It sounds like a vacuum leak. Or maybe a bad ground from when you swapped the engine over? Did you get all the grounds put back on in the right spots?
  18. Bextreme04

    1984 K10 LS Swap - Lots of Little Problems

    I don't really know how to help with the Terminator system. All I can say is it is way overkill for a setup like this. The Terminator likely cost more than the entire rest of everything combined, and will not control the system any better than the stock 0411 would have been able to. Ring out...
  19. Bextreme04

    Removing fuel tanks

    This was the first thing I did when I got my truck. I'm assuming you undid the straps and left the L-brackets in place and that's why you can't get in there? I literally had 30 year old original hoses welded onto the senders and was able to do this in no time at all. Take the bolts off the...
  20. Bextreme04

    SBC Build Questions

    If you are going to be rebuilding the engine then definitely pay close attention. Rebuilder pistons for SBC are almost exclusively down further in the hole than you would expect. You now have heads, which is a big part of the equation. The next part requires you to know how out of spec the stock...
  21. Bextreme04

    SBC Build Questions

    The GMT-400 crowd really have good luck and highly recommend the Summit 8800 cam in the trucks and burbs. You should be fine using those vortec heads and the 8800 without needing to do any machining for clearance. https://www.gmt400.com/threads/summit-8800-cam-upgrade.66438/ I would recommend...
  22. Bextreme04

    Exhaust Manifold Help

    WHAT!?!?!?!
  23. Bextreme04

    What have you done to your square lately??

    How are all of them hooked up? You have a 4-port spark delay valve on it now? These is what they normally look like: https://www.gmpartsgiant.com/parts/gm-valve-476330.html But they are all discontinued and not made anymore. I would recommend just removing the two red and red-hashed lines from...
  24. Bextreme04

    What have you done to your square lately??

    A delay valve is a check valve with a metered leak in it. What it is doing is allowing the vacuum to slowly leak out so you aren't jumping straight from 40 degrees advanced to 30 when you stab the throttle. It is primarily to keep it from stumbling when timing slams quickly while the secondary...
  25. Bextreme04

    What have you done to your square lately??

    Not sure what you are trying to do here, but you don't want more timing at WOT. You want 32-36 degrees of timing at WOT with most older SBC and BBC heads. Aluminum fast burn chambers in modern heads will generally want less timing because the combustion happens faster and more efficiently. You...

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