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Something terrifying happened!
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11-19-2012, 10:05 AM | #1 |
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Something terrifying happened!
Hey guys, I was driving normally until I was driving up a hill and I felt like flooring the car. So I turned the DSC completely off, (was driving in first gear) and floored it. When the RPM needle hit 7000 Rpm (and everything was top notch), the car did shift into second gear like usual (auto), but this time accompanied with 3 LOUD consecutive bangs that came from the exhaust "BABABA" like that; it sounded the same as 2step. So i immediatly let my foot of the gas pedal and the car started vibrating like crazy as if it was misfiring. so I parked, turned the car off for 10 seconds, started it again and everything is back to normal.
When I got to work, I parked it, let it rest for 1 hour, then checked underneath for oil or something and found nothing. things you should know: I have JB+, ERCP, Dci's, muffler delete. I have also replaced the HPFP (newest serial) 4-5 months ago. Any thoughts about this? I'm def. worried!
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11-19-2012, 10:09 AM | #3 |
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Ill go tomorow morning to the local mechanic to see if any codes got thrown since I dont have a scanner yet. Btw ECL didn't come on.
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11-19-2012, 10:19 AM | #6 |
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Are you sure it shifted? It sounds almost like it was bouncing off the rev limiter. I know the AT shouldnt do this, but if it was a misfire the car wouldve shuddered heavily as well. Please update us when possible.
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11-19-2012, 10:22 AM | #7 |
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It's definitely probably a misfire lol... no, but seriously try checking the codes it threw. I had the same issue. I have a cobb tune and once I reach about 15psi, I too would hear a bang and a weird note coming from the exhaust. Turning the car off def made it go back to normal, but if I punched it, I would get the same exact problem. I changed the ignition coils and spark plugs and the issue went away. You may only need to change the spark plugs, but Im at 80k and drive like a maniac, so I changed both lol
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11-19-2012, 10:43 AM | #8 |
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It seems it drives normally. Just don't floor it until your read the codes.
kifak man? b3atle PM w bse3dak to debug
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11-19-2012, 10:46 AM | #9 |
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sometimes the car makes sounds like that when you get wheel spin and the traction control cuts power abruptly... but since you had it switched off, i'm not sure...
did you have it fully off (hold for 3 sec) or just DTC (single press) ?
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11-19-2012, 10:56 AM | #10 |
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sounds like you have a bad injector\s
it may be gone for good, but if it comes back, my money is on the injectors as I recently experienced the same
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11-19-2012, 11:06 AM | #11 |
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sounds like a bad misfire, you should have codes stored. If the car starts OK with no limp mode, you should be fine to drive home. Id keep throttle loads modest though. Good news is if it is a misfire, plugs and/ or a few new injectors outta take care of it.
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11-19-2012, 12:03 PM | #14 |
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This was my guess as well. I just had injector 6 go bad and my car was misfiring with bad pops upon deceleration.
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11-19-2012, 12:05 PM | #15 |
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Drives: 2007 E92 SG 335i 6MT
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Sounds like a misfire. I got those same NLS/backfire type sounds when i misfired
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11-19-2012, 12:29 PM | #16 |
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Sounds like a misfire to me! I've had some pretty scary feeling misfires before. Most of mine went away with replacing the plugs. I still need to replace a coil or two.
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11-19-2012, 12:40 PM | #17 |
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I have an AT an have slammed the rev limiter from a 40 in 2nd do to wheel spin. Heard a really large bang then to be launched as the car cought traction no issues though
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11-21-2012, 04:02 PM | #19 | |||||||||
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Yeah It shifted, the mechanic gave me an appointment scheduled to tomorrow since he had too many customers.. so luckily I'll update you guys tomorrow. Quote:
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However, what happened yesterday wasen't normal at all. I had it fully off (3sec) and it made 3 huge bangs very similar to a subaru antilag or 2step (RAPAPAP <- like that) while shifting to second gear after hitting the redline. Quote:
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11-21-2012, 08:55 PM | #21 |
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have the same problem, but my half engine light goes on! leaves after a couple of seconds! i used to shit off the car and start it back so it can leave! Now i mostly do highway so i let it run on neutral and the light and shaking leave!
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11-22-2012, 09:50 AM | #22 | |
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This time in my case, cel light didn't go on, this is why I'm suspecting injectors/coils etc.
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