quick boost leak question!

the boy · 06-05-2012, 02:55 PM

Is it possible to have a boost leak at low rpms and not have one at higher rpms??? as in 4200rpms and up!

themyst · 06-05-2012, 03:03 PM

No

the boy · 06-05-2012, 03:33 PM

so if i hae a boost leak there would be power loss through all rpm ranges!?

Jeff@TopGearSolutions · 06-05-2012, 03:33 PM

Quote:

Originally Posted by the boy

so if i hae a boost leak there would be power loss through all rpm ranges!?

Imagine a hole in a straw. Wouldn't matter a hole is a hole. A good boost leak will throw a CEL after 4 second of wide open throttle.

the boy · 06-05-2012, 03:47 PM

good example thanks!! my car has no power between 2200 and 4200rpm until i get over 100 kph! any ideas.. there no lights on the dash either!

Mike@N54Tuning.com · 06-05-2012, 03:55 PM

Quote:

Originally Posted by the boy

Is it possible to have a boost leak at low rpms and not have one at higher rpms??? as in 4200rpms and up!

Nope... the higher the boost the bigger the leak is going to be.

Mike

Mike@N54Tuning.com · 06-05-2012, 03:55 PM

Quote:

Originally Posted by the boy

good example thanks!! my car has no power between 2200 and 4200rpm until i get over 100 kph! any ideas.. there no lights on the dash either!

Are you a running a tune? Have a boost gauge?

Mike

the boy · 06-05-2012, 06:25 PM

no tune.. i have a jb3 just havent put it in yet!!! wanna resolve this issue first.. no boost gauge.. it works perfect once i get to 60 mph!

Jeff@TopGearSolutions · 06-05-2012, 06:31 PM

Quote:

Originally Posted by the boy

no tune.. i have a jb3 just havent put it in yet!!! wanna resolve this issue first.. no boost gauge.. it works perfect once i get to 60 mph!

Depending on the mileage you can have several problem areas. Usually on cars with over 50K really 75K+ you want to start changing vacuum lines. Overtime the stock DV weaken so you may want to replace or upgrade those. They can fail sooner.

Other times it's as simple as a connection at the intercooler or throttle body or inbetween not being tight enough or sealing correctly.

Only way to tell is have the system pressure tested.

I dont think your problem is a boost leak, especially with no codes.

the boy · 06-05-2012, 09:59 PM

Which vacuum lines you talkin?? The ones that go to the pressure converters that connect to wastegate?? You could be right the car had 45000kms which isn't much but it sat for a year with the hood off which wouldn't help those lines!..,?

the boy · 07-10-2012, 01:59 PM

problem ended up being fuse for the electric fan! FML!!

06-05-2012, 02:55 PM	#1
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	quick boost leak question! Is it possible to have a boost leak at low rpms and not have one at higher rpms??? as in 4200rpms and up!
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06-05-2012, 03:03 PM	#2
themyst Major General 189 Rep 6,631 Posts Drives: '16 MK7 GTI Join Date: Feb 2009 Location: NYC iTrader: (8)	No __________________ E90 LCI N54 6AT
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06-05-2012, 03:33 PM	#3
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	so if i hae a boost leak there would be power loss through all rpm ranges!?
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06-05-2012, 03:47 PM	#5
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	good example thanks!! my car has no power between 2200 and 4200rpm until i get over 100 kph! any ideas.. there no lights on the dash either!
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06-05-2012, 06:25 PM	#8
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	no tune.. i have a jb3 just havent put it in yet!!! wanna resolve this issue first.. no boost gauge.. it works perfect once i get to 60 mph!
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06-05-2012, 09:59 PM	#10
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	Which vacuum lines you talkin?? The ones that go to the pressure converters that connect to wastegate?? You could be right the car had 45000kms which isn't much but it sat for a year with the hood off which wouldn't help those lines!..,?
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07-10-2012, 01:59 PM	#11
the boy Private First Class 3 Rep 137 Posts Drives: 335i Join Date: Jun 2011 Location: PEI iTrader: (0)	problem ended up being fuse for the electric fan! FML!!
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