Downpipes fitted now no boost

F10m5_olly · 10-24-2021, 06:58 AM

Someone please help had some mtc downpipes fitted yesterday and now car feels like has no boost until later on in revs like past 5k. Its stage 1 MHD mapped and was an absolute animal normally and now I can put my foot flat and not spin up? Anyone had this before?
Many thanks in advance

1320racer · 10-24-2021, 07:53 AM

Any error codes before or after the installation of the downpipes.

F10m5_olly · 10-24-2021, 08:49 AM

Nope not a thing was epic before downpipes and oil service then drove after and was lame no induction noise or wastegate chatter like before

M3talllic · 10-24-2021, 06:51 PM

I would check to see if you have boost. I had this issue and it so happen that my boost solenoids had given out. Back to normal after replacing

mike@x-ph.com · 10-25-2021, 10:02 AM

Quote:

Originally Posted by M3talllic

I would check to see if you have boost. I had this issue and it so happen that my boost solenoids had given out. Back to normal after replacing

+1

also, check for a boost leak.

F10m5_olly · 10-25-2021, 03:14 PM

What's the easiest way to check for boost?

TinCanSailor · 10-25-2021, 08:31 PM

Data logging via the obdII port is going to be your best method.

M3talllic · 10-26-2021, 02:04 AM

Quote:

Originally Posted by F10m5_olly

What's the easiest way to check for boost?

I used BootMod3 for data logging that I actually purchased from @mike@x-ph.com

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by M3talllic

I would check to see if you have boost. I had this issue and it so happen that my boost solenoids had given out. Back to normal after replacing

+1

also, check for a boost leak.

THIS

F10m5_olly · 10-26-2021, 03:30 AM

I think I can data log on the mhd app ill have a look. I take it there is 1 boost solenoid for both turbos?

F10m5_olly · 10-26-2021, 05:31 PM

Right think I have found the problem one of the downpipes has broken the nipple on top of the vacuum pump so gotta find a nipple anyone know the part number?

Craze · 10-27-2021, 05:13 AM

What nipple on downpipes?

F10m5_olly · 10-27-2021, 05:27 AM

Nipple on vacuum pump where the boost solenoid is connected to

m5rosco · 11-02-2021, 03:06 PM

Quote:

Originally Posted by F10m5_olly

Nipple on vacuum pump where the boost solenoid is connected to

Post a pic, fellow Norfolk M5 owner!

dhm118 · 11-26-2021, 09:36 PM

Check for vacuum leaks

TinCanSailor · 11-27-2021, 09:37 AM

+1 on the vacuum.

This is a tremendous aid in helping ya visualize where everything is on the engine. Some good sections on vacuum and the intake/boost in the document.

AnotherM · 12-01-2021, 04:53 PM

Same thingbhappened to me when i installed the downpipes on my last car (n63)

It was the vaccun hose on the back of bank one. Right between the valve cover and the firewall.

Solo_M_Tech · 12-05-2021, 09:42 PM

Quote:

Originally Posted by F10m5_olly

Right think I have found the problem one of the downpipes has broken the nipple on top of the vacuum pump so gotta find a nipple anyone know the part number?

You need a new vacuum pump. You can't buy just the nipple by itself.

10-24-2021, 06:58 AM	#1
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	Downpipes fitted now no boost Someone please help had some mtc downpipes fitted yesterday and now car feels like has no boost until later on in revs like past 5k. Its stage 1 MHD mapped and was an absolute animal normally and now I can put my foot flat and not spin up? Anyone had this before? Many thanks in advance
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10-24-2021, 07:53 AM	#2
1320racer Second Lieutenant 132 Rep 214 Posts Drives: 2013 BMW F10 M5 Join Date: Oct 2017 Location: Maryland iTrader: (0)	Any error codes before or after the installation of the downpipes. __________________ Current:2021 Mazda MX5, 2013 BMW M5 Tuning Tech Stage 1, 2013 Buick Encore, 2013 Chevy Traverse LTZ Past: 2002 Jeep Grand Cherokee, 2014 BMW 550i MSport, 2005 Jaguar S-Type R, 2000 BMW 540i, 1997 BMW 540i, 1997 WS6 Pontiac Firebird, 1992 Eagle Talon TSI
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10-24-2021, 08:49 AM	#3
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	Nope not a thing was epic before downpipes and oil service then drove after and was lame no induction noise or wastegate chatter like before
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10-24-2021, 06:51 PM	#4
M3talllic Second Lieutenant 35 Rep 244 Posts Drives: M3 E92 & M6 GC Join Date: Jul 2017 Location: Corona, CA iTrader: (0) Garage List 2015 BMW M6 GC Comp [0.00]	I would check to see if you have boost. I had this issue and it so happen that my boost solenoids had given out. Back to normal after replacing
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10-25-2021, 03:14 PM	#6
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	What's the easiest way to check for boost?
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10-25-2021, 08:31 PM	#7
TinCanSailor Fueled by Recycled Dinosaurs! 630 Rep 1,170 Posts Drives: F06 M6 Join Date: Dec 2019 Location: 813Bay, Fl iTrader: (2) Garage List 2015 BMW M6 Gran Coupe [9.75]	Data logging via the obdII port is going to be your best method. __________________ 2015 F06 M6 Silverstone Metallic II, Individual Full Leather, B&O, Night Vis, CCB, RKAutowerks (CP Rods/Pistons, DI Cams, CF Intakes, Coated DP's & Billet Diff Brace), InfinityAuto Turbo Inlets, Mishi Oil Cooler, JB4, XHP S3, BM S3
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10-26-2021, 03:30 AM	#9
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	I think I can data log on the mhd app ill have a look. I take it there is 1 boost solenoid for both turbos?
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10-26-2021, 05:31 PM	#10
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	Right think I have found the problem one of the downpipes has broken the nipple on top of the vacuum pump so gotta find a nipple anyone know the part number?
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10-27-2021, 05:13 AM	#11
Craze Captain 161 Rep 687 Posts Drives: M5 E60, M5 F10, X5 50i Join Date: Oct 2017 Location: Australia iTrader: (0)	What nipple on downpipes?
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10-27-2021, 05:27 AM	#12
F10m5_olly New Member 2 Rep 11 Posts Drives: F10 m5 Join Date: May 2020 Location: UK,norfolk iTrader: (0)	Nipple on vacuum pump where the boost solenoid is connected to
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11-26-2021, 09:36 PM	#14
dhm118 Private 19 Rep 65 Posts Drives: F10 M5 Join Date: May 2016 Location: Austin, TX iTrader: (0)	Check for vacuum leaks
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11-27-2021, 09:37 AM	#15
TinCanSailor Fueled by Recycled Dinosaurs! 630 Rep 1,170 Posts Drives: F06 M6 Join Date: Dec 2019 Location: 813Bay, Fl iTrader: (2) Garage List 2015 BMW M6 Gran Coupe [9.75]	+1 on the vacuum. This is a tremendous aid in helping ya visualize where everything is on the engine. Some good sections on vacuum and the intake/boost in the document. __________________ 2015 F06 M6 Silverstone Metallic II, Individual Full Leather, B&O, Night Vis, CCB, RKAutowerks (CP Rods/Pistons, DI Cams, CF Intakes, Coated DP's & Billet Diff Brace), InfinityAuto Turbo Inlets, Mishi Oil Cooler, JB4, XHP S3, BM S3
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12-01-2021, 04:53 PM	#16
AnotherM Cole 319 Rep 498 Posts Drives: 2016 m5 CP Join Date: Oct 2020 Location: AZ iTrader: (0)	Same thingbhappened to me when i installed the downpipes on my last car (n63) It was the vaccun hose on the back of bank one. Right between the valve cover and the firewall.
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