No boost until I turn car off and on

Qasimateen · 07-13-2022, 02:17 AM

One day I was driving around for the day. Towards the end of my drive I decided to give it a little gas and I’ve noticed I got no boost at all. I tried giving it more gas but still no boost.

I then turned the car off and on. After starting it back up, the boost was back to normal. I was worried I had vaccine line leaks or any disconnection between the chargepipe or intercooler but everything looks fine so far.

I’ve had this happen twice to me so far and am wondering what can cause the issue. After the first time of this occurring, I did reflash the tune and it happened eventually again (not right away, the next day or two I think). Obviously by turning off the car then back on, the boost was back to normal again.

A possible DME or tune issue? I’m running Mhd stage 2+ version 10 (or whatever the latest version it is on today)

NoGuru · 07-13-2022, 10:17 AM

Get a data log when this happens and post it or else we are just guessing.

TheMidnightNarwhal · 07-13-2022, 10:29 AM

Are you sure the car doesn't go into limp mode? I used to keep shutting mine off and on to restore boost when I get limp mode when driving. But as mentioned above do scan codes as well, that's always step 1. Sometimes codes are there but don't throw a warning/CEL although limp mode should.

iqraceworks · 07-14-2022, 10:24 AM

Quote:

Originally Posted by Qasimateen

One day I was driving around for the day. Towards the end of my drive I decided to give it a little gas and I’ve noticed I got no boost at all. I tried giving it more gas but still no boost.

I then turned the car off and on. After starting it back up, the boost was back to normal. I was worried I had vaccine line leaks or any disconnection between the chargepipe or intercooler but everything looks fine so far.

I’ve had this happen twice to me so far and am wondering what can cause the issue. After the first time of this occurring, I did reflash the tune and it happened eventually again (not right away, the next day or two I think). Obviously by turning off the car then back on, the boost was back to normal again.

A possible DME or tune issue? I’m running Mhd stage 2+ version 10 (or whatever the latest version it is on today)

Use MHD and scan for codes. The car is going into limp mode.....see what the codes tell you.

Qasimateen · 08-03-2022, 12:07 AM

I did not get any codes or check engine lights whatsoever. Here is the data log from Mhd
Blue line is boost, orange/yellow line is throttle, and green line is rpm
file:///var/mobile/Library/SMS/Attachments/31/01/AD2A1242-06B7-4DB3-85D9-6F7CAB1955CB/IMG_3635.jpg

Qasimateen · 08-03-2022, 12:08 AM

No idea why I cannot post my screenshot on this thread lol

Qasimateen · 08-03-2022, 12:45 AM

Screenshot of logs are shown below

07-13-2022, 02:17 AM	#1
Qasimateen Enlisted Member 7 Rep 42 Posts Drives: Bmw 335i Join Date: Jun 2019 Location: Rancho cucamonga iTrader: (0)	No boost until I turn car off and on One day I was driving around for the day. Towards the end of my drive I decided to give it a little gas and I’ve noticed I got no boost at all. I tried giving it more gas but still no boost. I then turned the car off and on. After starting it back up, the boost was back to normal. I was worried I had vaccine line leaks or any disconnection between the chargepipe or intercooler but everything looks fine so far. I’ve had this happen twice to me so far and am wondering what can cause the issue. After the first time of this occurring, I did reflash the tune and it happened eventually again (not right away, the next day or two I think). Obviously by turning off the car then back on, the boost was back to normal again. A possible DME or tune issue? I’m running Mhd stage 2+ version 10 (or whatever the latest version it is on today)
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07-13-2022, 10:17 AM	#2
NoGuru Major 779 Rep 1,434 Posts Drives: 335is Join Date: Apr 2017 Location: MI iTrader: (0) Garage List 2021 Chevy Silverad ... [0.00] 2014 CTS [0.00] 2011 335is [0.00]	Get a data log when this happens and post it or else we are just guessing. __________________ 2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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07-13-2022, 10:29 AM	#3
TheMidnightNarwhal Major General 2814 Rep 6,384 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Are you sure the car doesn't go into limp mode? I used to keep shutting mine off and on to restore boost when I get limp mode when driving. But as mentioned above do scan codes as well, that's always step 1. Sometimes codes are there but don't throw a warning/CEL although limp mode should.
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08-03-2022, 12:07 AM	#5
Qasimateen Enlisted Member 7 Rep 42 Posts Drives: Bmw 335i Join Date: Jun 2019 Location: Rancho cucamonga iTrader: (0)	I did not get any codes or check engine lights whatsoever. Here is the data log from Mhd Blue line is boost, orange/yellow line is throttle, and green line is rpm file:///var/mobile/Library/SMS/Attachments/31/01/AD2A1242-06B7-4DB3-85D9-6F7CAB1955CB/IMG_3635.jpg
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08-03-2022, 12:08 AM	#6
Qasimateen Enlisted Member 7 Rep 42 Posts Drives: Bmw 335i Join Date: Jun 2019 Location: Rancho cucamonga iTrader: (0)	No idea why I cannot post my screenshot on this thread lol
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08-03-2022, 12:45 AM	#7
Qasimateen Enlisted Member 7 Rep 42 Posts Drives: Bmw 335i Join Date: Jun 2019 Location: Rancho cucamonga iTrader: (0)	Screenshot of logs are shown below Attached Images
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