05-15-2020, 06:35 AM | #23 | ||
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05-15-2020, 06:48 AM | #24 |
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Neither FCP Euro, or any other reputable retailer, would knowingly sell counterfeit plugs.
How do you know the previous owner ran only 89 octane? Cracked insulator is almost always user error on install or removal. LSPI wouldn't damage a plug and these engines aren't known for having LSPI issues. A LSPI event wouldn't occur at 4k rpm anyways. It's too high by a factor of 2. My guess is that the previous owner tuned the vehicle and/or abused it. The previous owner or the dealer could've flashed it back to stock.
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05-15-2020, 10:11 AM | #25 | |
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I'm wondering if when the indy replaced the original plugs, if he didn't have the correct socket and cracked the ceramic insulator on the old ones upon removal, maybe some pieces remained behind and fell into the cylinder upon removal. I can see this happening it the socket was slipping due to not being able to completely get around the nut and he kept pulling his ratchet out to reposition. I considered LSPI damage as well, but like Fleet said, these engines aren't really known for that, and these engines are rated for 89 octane gas. Unless the PO was using some really crappy quality gas. |
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05-15-2020, 10:18 AM | #26 |
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Very plausible, especially if the car was a lease return. I had this concern myself when I purchased mine CPO back in 2018. Hopefully that wasn't the case here.
Last edited by IraHayes; 05-15-2020 at 10:25 AM.. |
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05-15-2020, 11:39 AM | #27 | |
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05-20-2020, 03:43 PM | #29 | |
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Agreed. The only reason LSPI came up as a possible condition for the detonation that is happening is because the apparent load seems to remain a factor, but the event happens much later in the rpm range. So with this car you can: Let's say you're going 35 mph. If you downshift to a lower gear that brings the rpm up to around 4K, you can accelerate through all gears to redline without a hiccup. BUT, if you are already in a low rpm state (say 2.5K rpm) at speed and accelerate in that steady gear until 4-5K'ish rpm... it will super knock and shutdown. I tell ya man, it's weird as hell. Last edited by wesmeister; 05-20-2020 at 03:50 PM.. |
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05-20-2020, 03:45 PM | #30 |
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We are attempting to invoke that 3rd party warranty I purchased and replace the engine. If my claim is denied, I honestly don't know what to do. Might have to live with it since I am so upside down on the car loan.
Here is the current status with pictures if anyone wants to take a look: https://xoxocar.com/inspection.aspx?...f83&sb=def&b=1 |
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05-21-2020, 07:40 AM | #31 |
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This is wild. Thanks for keeping us updated. I would love to see it with the head off and get actual pics of the cylinder. That borescope they are using looks like a potato took the photos
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05-21-2020, 11:01 AM | #32 | |
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But I guess if maybe the cylinders are filled with pond water... that would explain a lot! |
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06-25-2020, 03:17 PM | #34 |
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Whatever happened with your car? Any updates?
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07-02-2020, 06:48 AM | #35 | |
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07-28-2020, 11:21 AM | #36 |
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Sorry been away due to general life upheaval due to coronavirus.
Definitely owe it to anyone that was tracking this with me, and perhaps someone that might encounter a similar issue in the future. The problem was.... a faulty crankshaft sensor! Long story short, the first shop I took it to was either incompetent or simply missguided. I stop short at accusing them of trying to steal my money, but my wife certainly feels that way. I had it towed to a BMW dealership and they had it fixed within a couple of days. The service advisor took a look at everything I have showed you guys in this thread, and knew the first thing to try right away. The busted spark plug and the piston float scenario are all now just mysterious and suspect. I still don't have a definitive answer for how or why those occured. Some here suspected a faulty plug install... and maybe with the detonation from the crankshaft losing synchronization it was just a perfect storm. Either way, it is fixed now and my F31 is back on the road "strong like bull". |
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07-28-2020, 11:45 AM | #37 | |
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07-28-2020, 12:03 PM | #38 | |
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07-30-2020, 07:15 AM | #39 |
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Wow. Hope you got reimbursed for all the bull. I would drive the car to them. Show them it is fixed and how, they really need to understand the magnitude of what they were advising and how completely misguided it was
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