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Maleficus Maleficus is offline
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Default Car won't crank/start after a successful MHD/Stock flash - 02-26-2018, 09:20 PM

So I've been running MHD stage 2 maps for a little over a year, alpina flash, and my car has been running a little off, felt shaky as i've been putting miles on it (it has 120k miles) so I decided i was going to flash it to stock and take it in to a shop. car has been running relatively well up unto this point, just took a short round trip about 350 miles and it did fine so the car has been operational. I flash it back to stock with MHD and it won't crank, flash was successful, no error codes, won't even crank just makes a mechanical sound and nothing. I flashed it to a few different MHD maps, all successful, still won't crank.

resent all adaptations, no crank
left battery unplugged for 3 days reflashed to stock, to stage 2, etc, no crank.

I'm at a loss, the car was fine until i flashed it back, every write has been successful but now it won't even try to start. Any ideas would be appreciated.

2009 335 120k miles, FMIC, down *****, charge pipe, been running MHD stage 2 maps for over a year.

Any help is greatly appreciated.
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Default 02-26-2018, 11:25 PM

Which tmap sensor do you have installed?



http://www.fuel-it.biz/

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Maleficus Maleficus is offline
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Default 02-26-2018, 11:53 PM

Hey Dave, I looked into buying a fuel-it system (unrelated to anything)

I haven't done anything to the tmap sensor.

Only parts I have is CP-E *********, cobb charge pipe, air filter, fmic.
MHD flash.
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mojo20032004 mojo20032004 is offline
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Default 02-27-2018, 08:05 AM

Check voltage on your battery. Possible the flash drained the juice and needs a jump


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Hexon turbos
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Maleficus Maleficus is offline
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Default 02-27-2018, 01:32 PM

I had a battery charger connected during the flash and everything else in the car is working (climate control, radio, etc etc) I've charged the battery overnight with the trickle charger a couple times as well just to check.

Thanks for the input guys, really trying to solve this without having to add more expense of a trip to the shop.
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Maleficus Maleficus is offline
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Default 02-28-2018, 06:51 AM

Any other ideas?
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Vorsprung_CJB Vorsprung_CJB is offline
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Default 02-28-2018, 09:32 AM

Are you flashing back to a backup BIN you made from your own DME before you loaded MHD the first time, or are you using MHD's generic "stock" option?
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Maleficus Maleficus is offline
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Default 02-28-2018, 12:26 PM

generic stock.
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LessIsMore LessIsMore is offline
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Default 02-28-2018, 07:47 PM

Something similar happened to me once, when flashing a new custom mhd flash. I had to flash the tune with MHD a good 5 or 6 times before the car started acting normal again. In my case the car would start but had strange lights on the dash and errors, but drove fine. I tried flashing again and it would not start or power up afterwards. Then I tried it a few more times and it finally worked and the errors were gone. Never had a problem before or since.

In my case it was usually only giving me the option of a quick rewrite Flash the takes 2 to 3 minutes.

My advice would be to contact MHD, and in the meantime keep trying to Flash back to stock and / or the other map to get one to work.


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2009 535i - 548whp - sold

Last edited by LessIsMore; 02-28-2018 at 07:52 PM..
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Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Default 02-28-2018, 11:25 PM

^ this

I’d also check and make sure you didn’t accidentally check any boxes in the options menu.



http://www.fuel-it.biz/

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Maleficus Maleficus is offline
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Default 03-01-2018, 12:50 PM

Alright, flashed the car 5 times in a row this morning and it has never tried to crank 1 time, i've got nothing. I guess it's going to end up in the shop, very frustrating. no options checked.
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335iE91 335iE91 is offline
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Default 03-01-2018, 01:42 PM

Might be a dumb idea but couldn't it be something as simple as a blown fuse?


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Jb4 G5, Mhd backend, Xhp stage 3, Vrsf **'s, Secondary *** delete, Occ and Dci, RB pcv, FTP oil thermostat, Billstein b14, M3 lower controle arms, Poly subframe bushings
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Default 03-02-2018, 09:37 AM

Any codes? Is your DME an MSD80? Almost sounds like fried DME Mosfet issue.

Dumb question but you aren't flashing a file meant for MT are you?

Has MHD not gotten back to you yet?
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Maleficus Maleficus is offline
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Default 03-02-2018, 10:32 AM

No codes, definitely not flashing as an MT.

MHD got back to me, said if it says flash successful it's probably a hardware issue.

Whenever I get time to setup a tow etc it's going to the shop, i'll try to take a video of the sound it makes when i try to start it, it's not a crank, not like it's turning over, a different sounds.

I don't know what DME I have i can try to lookup how to check which one it is.
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Maleficus Maleficus is offline
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Default 03-02-2018, 10:56 AM

Sorry for moving the camera around, trying to capture the sound.

https://vimeo.com/258306032
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tphaeng tphaeng is offline
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Default 07-11-2019, 12:37 PM

What was the issue?
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Maleficus Maleficus is offline
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Default 07-11-2019, 01:00 PM

ended up being the starter like people had said/suspected, just really coincidental timing. went from being completely fine to dead starter and it happened between me driving the car and deciding to flash.
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