BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      06-28-2020, 11:31 AM   #1
bernardom
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What happened to my tune?

I bought a very nice 2011 BMW 135i convertible almost a year ago. It came with a bunch of upgrades, including a Pure 1 turbo, BMW charge pipe, VRSF downpipe, etc. and some type of engine tune (I wasn't told exactly which one). The car ran and drove awesome and it had a burble, pop, bang exhaust note all the time which I really enjoyed.

I had to take the car to a BMW dealer recently because it had an ABS and passenger airbag warning. They said the airbag issue was probably a power glitch and they reset it. They also wanted to change the two rear wheel speed sensors to see if that would clear the ABS warning, but due to the estimated (high) cost, I declined and picked up the car. When I drove off the lot, I noticed my exhaust was no longer making ANY of the previous burble, pop, bang noises. Right away I thought they may have done something to erase the tune, but I called and spoke to the service manager who said what the tech did would not have erased the tune. So I'm am at a loss as to what happened. The exhaust was the same for me over the past year, and when I picked up the car, it was different.

I am also noticing another strange issue. The engine will pull strong up to about 4,500 rpm then it just stops making power. It feels like it just shuts down. I don't remember this problem either before taking it to the dealer.

I change the rear wheel speed sensors myself, and this fixed the air bag warning light issue (I guess it was on because the one sensor controls the speedometer), but the ABS issue is still active.

So I am writing to see if anyone on this forum can help me. I'm a novice when it comes to the upgrades and tuning. If something happened to the tuning, I'm not even sure how to go about getting it back because I don't know what was installed in the first place or how it gets installed. All I was given by the previous owner (who was not the one who did the upgrades) was a piece of paper with a file name that starts with PS1 then the VIN then v13.mhd.

Help!!! Thank you 1addicts!
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      06-28-2020, 01:31 PM   #2
Petro135
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Sounds like he had a custom tune and it reverted back to stock. Not sure how to fix that except get a new tune. MHD is your friend, check it out
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      06-28-2020, 03:53 PM   #3
tracer bullet
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Agreed, sounds like the tune was lost, ECU turned back to stock or flashed to the most recent stock release.

MHD is one such tune, you may have had that given what was written on the paper. As far as that goes, yeah, gotta start researching what / how / etc.
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      06-29-2020, 09:51 AM   #4
mike@x-ph.com
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unfortunately its gone
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Check out our current sale by clicking on this link!
https://x-ph.com/sale/

Phone number 702-494-9435
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      06-30-2020, 03:49 PM   #5
Jeff@TopGearSolutions
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As the other guys said, you'll need to reach out to MHD for a tune and you may want to seek out a custom tuner. Let me know if you need any recommendations.
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      09-07-2020, 10:19 PM   #6
Mybimmer
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If you still have previous owners details he/she might still have the file... Worth asking.
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