05-04-2017, 06:16 PM | #1 |
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Probable boost leak? Please help
Recently have started noticing a considerable lower end lack of power..throttle response is sluggish and acceleration is relatively slow as am running straight pipes with no resonators and super sprint catless downpipes.. have eventuri Intakes..
No flaps on exhaust ..straight pipes .. Car was mapped stage 2 which I had removed today but as yet still no error light has come up which I was expecting as have super sprint catless downpipes..presume it will come on after some mileage.. Had it serviced and specifically mentioned loss of power but nothing bought up on diagnostics and no visible leaks.. Had spark plug service done about 6 months ago and presume gapping was done to standard not tuned car..but would that have any bearing.. Hoping to rebook it into independent ..but where should I start from? Any help advise suggestions would be greatly appreciated.. Any possibility of previous maps causing issues..can Ecu's be reflashed back to factory and if so how? Thanks Last edited by Goranot; 05-04-2017 at 06:55 PM.. Reason: Typo error |
05-04-2017, 10:05 PM | #2 |
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I would start with checking to see if the vacuum lines that run to the stock exhaust valves were plugged and sealed properly after their removal?
This is a common problem with aftermarket mufflers with no valves.
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05-07-2017, 05:42 PM | #5 | |
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Also make sure the one you did find is sealed completely air tight. Any leak at all would result in the symptoms you're describing.
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06-25-2017, 04:29 PM | #6 |
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Still ongoing issue..
Checked both vacuum lines and seals are tight.. Had another technician take a quick look whilst car was booked for MOT and he noticed a slight discolouring of a very small corner section of the intercooler on one side indicating I presume a possible leak.. He spray cleaned it and told me to bring it back after about a week and see if stain had returned and if so will take bottom cover of and investigate further.. In meantime is it possible its only a loose pipe as last year air conditioning rad presume was replaced under warranty..could they have dislodged something then? Thanks |
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07-04-2017, 07:34 PM | #9 |
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Sorry been away will take pics and post but don't have standard air boxes as replaced with Evunturi Intakes..
Have booked in for a boost leak test late next week and hoping something is picked up |
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07-19-2017, 07:06 PM | #10 |
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Had boost leak test but no issues found..
Speaking to another member who has similar setup .. straight pipes no resonators or backboxes and catless downpipes but only difference he has a Custum made X PIPE Could that possible be a cause as I have straight pipes throughout Any advise ideas appreciated |
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02-19-2022, 03:21 AM | #11 |
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I am being told I have a minor boost leak as my logs from my tune are showing I am not hitting peak boost. I am fully straight piped too, with catless downpipes, resonator delete and muffler delete by fabspeed - where can it be coming from if all my lines off the coolant are new rubbers and everything else has been checked and there are no visible signs in the obvious places. Please advise anyone.
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05-09-2022, 07:50 AM | #12 | |
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2013 BMW F10 M5, Moonstone Metallic, 700whp, stage 2 tune, fully straight piped - catless downpipes - resonator delete and fabspeed muffler delete, cold air intake and many more cosmetic mods. | '92 525i (long gone) | '02 Dinan M5 (sadly gone) | '06 Dinan M3 (also sadly gone)
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