DPF delete finally, but low end lag

_N54 · 09-21-2020, 04:09 PM

Finally had the DPF and ABC pretty much deleted on my car, but there is a strange low end lag almost like the small turbocharger isn't working properly and it does put out some black smoke out the tail pipe until the bigger turbo kicks on around the mid range.

Does anyone know what can cause this? I have all the vacuum lines replaced already.

_N54 · 09-21-2020, 06:51 PM

Anyone know exactly where the pressure converter solenoid is located? I've replaced the one near the back firewall recently, but I know there is another one.

RL18 · 09-21-2020, 07:14 PM

Quote:

Originally Posted by ///S58

Anyone know exactly where the pressure converter solenoid is located? I've replaced the one near the back firewall recently, but I know there is another one.

Did you change the two boost solenoids mounted on the vacuum box?

_N54 · 09-22-2020, 12:05 AM

Quote:

Originally Posted by RL18

Quote:

Originally Posted by ///S58

Anyone know exactly where the pressure converter solenoid is located? I've replaced the one near the back firewall recently, but I know there is another one.

Did you change the two boost solenoids mounted on the vacuum box?

No, I only replaced the one towards the rear firewall.

BendOR335D · 09-22-2020, 12:48 AM

I would check the vacuum lines for a hole or a mix up in lines.

Tambohamilton · 09-22-2020, 02:24 AM

Did you also have swirl flaps removed at the same time?

_N54 · 09-22-2020, 02:38 AM

Quote:

Originally Posted by Tambohamilton

Did you also have swirl flaps removed at the same time?

Yes swirl flaps have been deleted.

Tambohamilton · 09-22-2020, 03:15 AM

That would definitely contribute to low end lag and smoke. [Flame suit on]

_N54 · 09-22-2020, 08:54 AM

Quote:

Originally Posted by Tambohamilton

That would definitely contribute to low end lag and smoke. [Flame suit on]

It's not from the swirl flap delete. This lag isn't a normal lag like I said it's almost like the small turbo isn't working.

Tambohamilton · 09-22-2020, 10:22 AM

True; I said lag, but really what I should have said is 'low end lack of power'.

You're sure it's not from the swirl delete though?

BendOR335D · 09-22-2020, 03:39 PM

Have you had the ECU tuned after you did the DPF and ABC delete?

e90Noobie · 09-22-2020, 04:51 PM

Quote:

Originally Posted by BendOR335D

Have you had the ECU tuned after you did the DPF and ABC delete?

I'm wondering this too, the fact that he hasn't mentioned that makes me worry.

Otherwise it's probably vacuum related. The part was already weak and with the new power it finally failed.

_N54 · 09-22-2020, 08:22 PM

Yes the DDE was flashed all at the same time with the delete. After doing some deep research and some diagnostic the EL valve needs to be replaced.

This video helped a lot:

335Keymo · 08-16-2024, 08:28 AM

If you didn’t do an EGR delete, you will get low end lag for sure.

lnxguy · 08-16-2024, 08:33 AM

Quote:

Originally Posted by 335Keymo

If you didn’t do an EGR delete, you will get low end lag for sure.

This is absolutely false.

335Keymo · 08-24-2024, 12:33 AM

Quote:

Originally Posted by lnxguy

This is absolutely false.

Maybe just my car but it happened to me.

lnxguy · 08-26-2024, 10:44 AM

Quote:

Originally Posted by 335Keymo

Maybe just my car but it happened to me.

Then you had other issues going on if that's the case.

09-21-2020, 04:09 PM	#1
_N54 Captain 302 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	DPF delete finally, but low end lag Finally had the DPF and ABC pretty much deleted on my car, but there is a strange low end lag almost like the small turbocharger isn't working properly and it does put out some black smoke out the tail pipe until the bigger turbo kicks on around the mid range. Does anyone know what can cause this? I have all the vacuum lines replaced already. __________________ 2013 335is - sold 2011 335d
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09-21-2020, 06:51 PM	#2
_N54 Captain 302 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	Anyone know exactly where the pressure converter solenoid is located? I've replaced the one near the back firewall recently, but I know there is another one. __________________ 2013 335is - sold 2011 335d
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09-22-2020, 12:48 AM	#5
BendOR335D New Member 3 Rep 19 Posts Drives: 2010 335D Join Date: Jun 2020 Location: Bend, Oregon iTrader: (0)	I would check the vacuum lines for a hole or a mix up in lines.
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09-22-2020, 02:24 AM	#6
Tambohamilton Brigadier General 3170 Rep 4,047 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	Did you also have swirl flaps removed at the same time?
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09-22-2020, 03:15 AM	#8
Tambohamilton Brigadier General 3170 Rep 4,047 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	That would definitely contribute to low end lag and smoke. [Flame suit on]
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09-22-2020, 10:22 AM	#10
Tambohamilton Brigadier General 3170 Rep 4,047 Posts Drives: E91 330d Join Date: Apr 2019 Location: Herefordshire iTrader: (0)	True; I said lag, but really what I should have said is 'low end lack of power'. You're sure it's not from the swirl delete though?
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09-22-2020, 03:39 PM	#11
BendOR335D New Member 3 Rep 19 Posts Drives: 2010 335D Join Date: Jun 2020 Location: Bend, Oregon iTrader: (0)	Have you had the ECU tuned after you did the DPF and ABC delete?
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09-22-2020, 08:22 PM	#13
_N54 Captain 302 Rep 884 Posts Drives: 335d Join Date: Mar 2020 Location: USA iTrader: (0)	Yes the DDE was flashed all at the same time with the delete. After doing some deep research and some diagnostic the EL valve needs to be replaced. This video helped a lot: __________________ 2013 335is - sold 2011 335d
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08-16-2024, 08:28 AM	#14
335Keymo New Member 2 Rep 10 Posts Drives: 2011 BMW 335D Join Date: Aug 2022 Location: South Florida iTrader: (0)	If you didn’t do an EGR delete, you will get low end lag for sure.
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