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Holley Tech

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  1. Holley Tech
    Good. I look forward to digging into the files. I have a couple of hunches that I'd like put to rest. -Luke @ Holley Tech
  2. Holley Tech
    Good to hear. Hopefully, it's something relatively simple that we can work through. -Luke @ Holley Tech
  3. Holley Tech
    I apologize for the hiatus. As we are now in our busiest season here, I have not had a lot of time to watch the forums. I tried to read as much relevant information as I could (but with 11 pages and limited time...). If you could, would you please post a new datalog catching the issue, and the currently updated tune with your newest learn values? I believe this is something that we may be able to fix. Basically, all of our EFI systems were developed with Domestic engines in mind, so sometimes the fueling in the low range can get a little funky when used on something else. I'll also show everybody a neat trick you can do with our datalogs that you may, or may not, know about already. -Luke @ Holley Tech
  4. Holley Tech
    Dudeland, I apologize for the hiatus. For some reason I am still not getting notifications. Any new updates since you've gotten it running better? Also, if you don't hear from me, the best way to reach me is via telephone. -Luke @ Holley Tech
  5. Holley Tech
    I do believe that it can indeed cause the issue you're having, but it is hard to say exactly. It may not be THE problem, but I do know that it is certainly A problem. Only way to really know is to fix it and see. If it continues to have an issue after the header swap, take a couple more logs and let me know. -Luke @ Holley Tech
  6. Holley Tech
    I agree that an exhaust leak, even a small one, before or near the o2 sensor, can indeed cause a hunting issue since the system is still in a large allowance for closed loop and learn until they are manually reduced. Also, an exhaust leak will make it run overly rich, as well. As far as the magnetic input for the distributor? It is looking for a 12v square wave signal. It is neither hall-effect or 5v. I am still not 100% positive on how to wire that module. I hate to say that 99% of our experience and testing with the system was done on American domestic vehicles. -Luke @ Holley Tech
  7. Holley Tech
    I apologize for the delay! For some reason, I have stopped receiving notifications for this forum. You are correct. You can't use a toothed crank trigger to get your RPM signal directly. You can use a flying magnet style wheel though (like an MSD). It will pull the same signal as a mag-pickup distributor, and the Sniper won't know the difference. Let us know when everything is back up and going. I'm glad you got the distributor figured out, as I was not having much luck getting the info I needed on it. -Luke @ Holley Tech
  8. Holley Tech
    Actually the Sniper has injectors that are rated at about 60psi for proper function. So anywhere between 55-65psi is considered acceptable. -Luke @ Holley Tech
  9. Holley Tech
    Dudeland, there are 2 things I want to go over with you. 1.) If droplets of fuel are coming out of the barrels initially, then the base fuel table is likely just too rich causing fuel to splash back out. This is something that will generally clear itself up as it goes into learn for a little bit. 2.) The learn percentage that is shown on the handheld is not a progress report. It is how much it is adding or taking away from the base fuel table. So in theory, the smaller the number (closer to zero), the better off you are. After a little more drive time, be sure to go in and transfer the learned data to the base. This will reset the learn table, and should reduce the learn percentages you see after the transfer. To do this, follow the below steps. Tuning>Advanced>Advanced Learn>Transfer Table Run>Do you want to smooth the table with the learned values?>OK -Luke @ Holley Tech
  10. Holley Tech
    That's great! We're happy to see it going. Something that can potentially help with the touchy throttle is a throttle lever extension, which gives better leverage/geometry for the linkage. You may need a reducer bushing for the large hole, too. Check out the links below. -Luke @ Holley Tech https://www.holley.com/products/fuel_systems/carburetor_components/brackets_and_linkage/parts/1952 https://www.holley.com/products/fuel_systems/carburetor_components/brackets_and_linkage/parts/26-103
  11. Holley Tech
    Looking much better now. Proper wiring is the single most important part of having a good and successful experience when converting to EFI from a carb. -Luke H.
  12. Holley Tech
    I will do some research on this distributor and get back with you. -Luke @ Holley Tech
  13. Holley Tech
    All looking great. I know you said that plumbing into the breather pipe was not a permanent thing, so this is advice for when you change it. Make sure the return goes back in the tank, and exits BELOW the fuel level. Meaning, you should run a tube on the inside that exits near the bottom of the tank. You don't want the return dropping in on top of the fuel level, causing more and more aeration as the fuel level drops. The longer it runs this way, the more it will reduce the life of the pump, or even kill it outright. -Luke @ Holley Tech
  14. Holley Tech
    Just to be a little more specific, the base fuel tables created when using the setup wizard work best when running the fuel pressure between 55-65psi. The Sniper can compensate at least this far to make it work. Just make sure you check the fuel pressure, and change it in the tune so it more appropriately react. It is not vacuum referenced, so pressure should remain fairly constant. -Luke @ Holley Tech
  15. Holley Tech
    It looks like you're putting a lot of hard work into this. It's all looking great, and appears to be coming together. We're excited to see the finished product. And you are correct: the CTS we use is the same exact style as the GM 2-wire coolant temp sensor. -Luke @ Holley Tech
  16. Holley Tech
    That's good to hear. Proper o2 sensor placement is key to getting the Sniper to operate correctly. And, as you know, it is key to the life of the sensor as well. -Luke @ Holley Tech
  17. Holley Tech
    AustrianVespaGuy, Actually you are half right. When initially setting up the unit, and programming it, it will just allow you to pick a target AFR for idle/cruise/wot. There will not be access to the entire fuel map on the handheld, as it is restricted by space. The entire fuel table on the small, handheld display just isn't very feasible. However, with the USB CANBUS dongle he purchased with his Sniper unit, he can access the entire fuel map by downloading our tuning software from our website (which is free), and hooking up with a laptop. You can even do this with the engine running to make live changes to the tune. Below, you'll find a link to the free Sniper software. -Luke @ Holley Tech https://www.holley.com/support/resources/#Fuel_Injection
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