08-04-2020, 03:38 PM | #67 |
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08-04-2020, 05:14 PM | #68 |
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Warranty wouldn't pay, ECU manipulated. I was told by the tuner to do an oil change flash to standard and update all modules I did this but they still picked it up. Even after the dealership told me it was a defective part. They won't tell me what they found tho. BMW CS tell me it was the dealership who refused it and the dealership tell me that bmw refused.
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08-04-2020, 06:02 PM | #69 |
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Warranty wouldn't pay, ECU manipulated. I was told by the tuner to do an oil change flash to standard and update all modules I did this but they still picked it up. Even after the dealership told me it was a defective part. They won't tell me what they found tho. BMW CS tell me it was the dealership who refused it and the dealership tell me that bmw refused.
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08-04-2020, 11:20 PM | #70 | |
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08-05-2020, 12:44 AM | #71 |
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08-05-2020, 01:20 AM | #72 | ||
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I suspected a little of both because the dealer suspiciously asked me; "Why didn't you buy your car from us" before giving me the bum rush 🤨 And then warranty adjuster told me that the dealer said they're refusing the work but BTW, why did I have aftermarket rotors on (they weren't) 🤨. I concluded that the dealer didn't want to do a transmission job, for warranty flat book rate and the warranty company just backed their play. Meanwhile, I'm stuck with a $600 diagnoses fee and a broken car, with the gearbox in the hatch. That's why now when I get a chance to milk any of these companies, I the play the roll because when they get the opportunity, they bend you over, with no lube. |
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08-05-2020, 05:54 AM | #73 |
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The way I understand it is that warranty repairs go by the BMW book rate for hours....which is usually grossly underestimated. That's why the deal ends up paying some of the cost sometimes. I'd be curious to see what percentage they actually eat though. It can't be that high or else they'd alway fight claims.
On the other hand, if a dealer is denying my claim they sure as hell aren't getting my business anymore. |
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08-05-2020, 07:24 AM | #74 |
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Interesting read. Thanks for sharing OP - hope you find a less painful solution.
What damage might have been done to No1 cylinder in the initial incident with the Dinan piggyback that could have led to the later problems? Also, OP: How did they come up with the Dinan diagnosis? too much boost and not enough fuel as a 'signature' somewhere in the DME, or? |
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08-05-2020, 07:45 AM | #75 | |
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08-05-2020, 12:17 PM | #76 |
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Possibly, but something happened with the piggy bag. And subsequently, No1 appears to have been suffering a lot more pre-ignition than the rest, despite running a reputable tune and a bigger intercooler. Hence the question.
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08-05-2020, 04:02 PM | #77 |
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I have a hard time seeing that the Dinan Sport caused this issue seeing that over 10000 miles passed without an issue after it was removed. Not until 4000 miles of using the BM3 did the catastrophic issue happen and prior to that event, a super knock issue occurred, breaking the spark plug. It sounds like there could be an injector issue, but these cars are quite sensitive to issues with injectors. I think the likely scenario is the fuel pump crashing under high/heavy load on a hot day and causing a lean condition and ultimately a very dangerous knock event. All it takes is a major event over the course of less than a second to destroy a piston and/or rod bearing.
We know the N55 in M2 is already pushing near it's a fuel pump limits in stock form. We also know that the fuel pump starts crashing near 400whp. It could simply be that this fuel pump was a bit weak or the perfect set of unfortunate circumstances occurred.
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08-05-2020, 04:15 PM | #78 |
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To be clear, I don't think it caused the issue, as that was - as you say - a long time before the events that destroyed the engine. I was wondering if the initial event did something that then made the subsequent events more likely. The reason i asked was that the dealership mentioned Dinan on apparently no information. Spurious correlations are definitely not causation though. HTH
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08-05-2020, 04:29 PM | #79 |
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This is terrible I feel for you, my worst fear! Though I've not seen too many reports it's making me think twice about stage two even though will be FBO in the coming weeks.
Maybe stage 0 or 1 for me! |
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08-05-2020, 05:02 PM | #80 | |
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08-05-2020, 05:32 PM | #81 | |
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My guess to what happened to op was the tune was way too aggressive and constantly causing feedback knock and actual knock at all times, and it was cylinder 1 that for whatever reason took the most damage. Maybe carbon build ups caused hot spots in that cylinder which could explain why it was the one that had the most knock and plug damage. Or it could be the injectors. But likely the tune was way too aggressive. If op were to data log it would likely be apparent if not enough fuel was sprayed into cylinder 1 due to injector issues because that cylinder would run hotter and have more timing pulls due to knock. it would have also showed if the tune was too aggressive and overall saved the engine. The lesson is to always data log your car before flashing a tune to see if your local fuel quality is good enough to even support a tune, and then log after tuning. Also start with the least aggressive map first and move your way to more aggressive maps. But if at all possible run a custom tune.
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08-05-2020, 09:26 PM | #82 |
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I appreciate everyone’s feedback. After the dash warming came up, I drove for approx 2 miles to get off the highway. The car never made any noises or odd sounds. It was just a noticeable loss of power and white smoke coming from under the hood when I finally got the vehicle off the road. I started it one time after I put the factory tune back on it and it wasn’t making any noise but it obviously didn’t sound normal due to the issue with cylinder 1.
I’ve found 2 M2 rebuilt short blocks but they’re in Europe somewhere. Might not be worth the cost to ship it. Still a wait and see at this point. |
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08-06-2020, 10:43 PM | #83 | |
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