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  1. R

    Batteries

    So I'm looking to replace my 4 year old H7 with a H8 and thought I would share some info I found. I created a spreadsheet of details for the most popular brands of batteries and who makes them. For the H8 AGM, Duralast, Diehard, Interstate MTX, and EverStart are all the same battery...
  2. R

    Idle Help

    Let me give it a try. I have gap iid on my phone, so will need to grab the wife's phone to record. I do have a screenshot of when put a load on at idle.
  3. R

    Idle Help

    A little more info. The idle has been a little better, but still sometimes drops to 600ish and then comes right back to 620ish. Today I opened the window and turned the air con off and it idled perfectly. So I tested the idle by adding load to the battery/alternator. Whenever I add a load...
  4. R

    Idle Help

    Thanks. I'll see if I can get a video. When I come to a stop, it starts to idle about 680 or so, then after 15 seconds it drops to 620ish. When it drops, it idles a little rougher, and sometimes dips to 600 them comes right back to 620. If the car is warm and I shut it off, when I...
  5. R

    Idle Help

    I reset the adaptations primarily because I replaced the MAF's. Will report back after a while.
  6. R

    Idle Help

    So still troubleshooting. I replaced both MAF sensors and still have the low idle. I also found that if I shut down the truck and restart it, it starts with a low idle. If it's running and I come to a stop, it takes 10-15 seconds before the idle drops. Thinking about resetting...
  7. R

    Idle Help

    Thanks. Actually it has to be thin. NAPA carries them. Called "European Clamp".
  8. R

    Idle Help

    So battery is at 12.5v resting. I propped open the butterfly and did the smoke test, but I think my resonator is shot. The clamp was stripped from over tightening and I think it's deformed because smoke was pouring out of the throttle body. I had it sealed with a piece of innertube, but...
  9. R

    Idle Help

    Man, you are awesome. Thank you. Great point on the butterfly, never thought of that! The battery is 4 years old, I do know that. I'll check voltages at the battery. I checked it myself and had autozone check for the hell of it, and it came back good both times. But I hear you need a...
  10. R

    Idle Help

    I removed the air filters and maf, plugged up one side of the resonator and inserted the bladder in the other side. This is how I found a leak where the resonator connects to the throttle body (fixed). I let the test run for a while and had good pressure and did not see any leaks.
  11. R

    Idle Help

    Thanks. I did this this morning after driving to work. Bank 1 @ 619 RPM = 12.54% Bank 2 @ 619 RPM = 9.37% Bank 1 @ 1703 RPM = 5.47% Bank 2 @ 1703 RPM = 3.12% Bank 1 @ 2405 RPM = 8.64% Bank 2 @ 2405 RPM = 7.81% Looks like Bank 1 is higher, but not considerably. I did do a smoke test...
  12. R

    Idle Help

    Thanks. That was my question about low pressure. At idle, the average actual fuel pressure is 3% lower than desired. Is a 3% difference indicative of low fuel pressure or is it within acceptable range?
  13. R

    Idle Help

    So I think I found the issue. The air duct is leaking where it clamps to the throttle body. New clamp, but still has a small leak. I cut a piece of innertube and put that under the clamp and that helped a lot. So a very small leak though. Short of replacing the air duct, any ideas?
  14. R

    Idle Help

    Still chasing this issue. I did a smoke test and found some small leaks in the intake. The clamp on the throttle body was stripped. I replaced it (NAPA sells then as European Clamps) and that didn't fix the issue. Had the battery checked and is good. I checked the fuel rail pressures...
  15. R

    Idle Help

    So update. I over fixed it. Charged the battery off the car, waited an hour, and hooked it back up. Using gap, I reset the bcm. Being the idiot that I am, I also reset the secondary battery. So now the freaking stop start is working again. I did take off my seatbelt so I could test...
  16. R

    Idle Help

    Right here. https://www.expedition-parts.de/en/batterieprobleme-beim-discovery/
  17. R

    Idle Help

    Interesting you bring this up. I just read that you should never charge the battery with the posts as it will bypass the bcm. Also I don't know who put this battery in. So I unhooked the battery and am charging it now. When charged I will let it sit for 1 hour. Then I will hook it up...
  18. R

    Idle Help

    You may be right. Either battery or alternator is what I'm hoping. I do notice that the volts on the display by the speedo have always shown under 12v. Right now it says 11.4v. Check the battery with a meter and it's 12.2v. Engine off.
  19. R

    Idle Help

    Yes, I am still getting the low idle and shudder. Goes away when I turn off the hvac and electronics. I noticed it was electrical when I was at a stoplight and turned on the seat heater and the rpms dropped. I'm thinking battery too. The one in there now is a Diehard AGM. No idea how old...
  20. R

    Idle Help

    Ha. Already gone. You get what you pay for... under 20 from Amazon 15 years ago.
  21. R

    Idle Help

    More info, and hopefully good news. So I have a cheap Bluetooth reader that I used on my D2 with no issues. Have had it for years. When I used to use it on my wife's 2007 Mazda CX-9, and it would always make the car throw a code. So I never really used it in her car. So while trying to...
  22. R

    Idle Help

    Thanks for those. I did read through a bunch of posts on different forums, but nothing that was exactly like I am experiencing. But I think the vacuum leak is good thought. Thanks.
  23. R

    Idle Help

    I did run a can of seafoam through the tank. I'll try BG 44k. Thanks.
  24. R

    Idle Help

    Hi all, I have a 2015 LR4 with the 3.0SC and 94k miles. When I come to a stop, about 15-30 seconds later the idle drops to about 620 and the truck shakes a little. Happens with and without aircon, but only in gear. I cleaned the MAF's, cleaned the throttle body, changed the plugs, checked...
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