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Author Topic: LOW Boost - NO CODES - A process of elimination list.  (Read 1023 times)

Offline Big Tone

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LOW Boost - NO CODES - A process of elimination list.
« on: 05 March 2012, 07:41 »
Quick thought,

what about a list/chart for LOW boost - NO CODEs issues?

I am sure loads of peoples motors on here just arent QUITE the same as when they were mapped and suffer from low boost, but yet have no fault codes, so I thought I'd try to start a list of "places to look".

PLEASE CONTRIBUTE/EDIT/CORRECT etc as you will notice my "list" consists of one entry :grin: because I dont know where to look next!  :grin:

I am just so fcuked off by low boost I need to do something about it.

1. The most obvious - LEAK!
 - Pressure test system and repair any leaks.
2. Wastegate Actuator????
 - Done some reading and understand that Less preload + more boost, and that about 12 threads should be showing, lol, but apart from that dont really want to mess about with something I dont understand. lol


There is one thing, a pressure test is tight, however there is still a loss into the block and out of the breather system, (PCV deleted).
LOW BOOST AND NO CODES FCUKS ME RIGHT OFF!
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Offline Ashmond

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #1 on: 05 March 2012, 07:54 »
Map sensor?
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Offline Big Tone

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #2 on: 05 March 2012, 08:19 »
Quote from: Ashmond on 05 March 2012, 07:54
Map sensor?

OK, any further info? what to look for? how to test?
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****FOR SALE**** 11 Months MOT, 5 Months Tax - 1.8T AUM, Stage 1 map, Lowered 35mm on Jamex Springs, Smoothed Airbox, Pipercross Panel, Forge 007P, N249 Bypass, Silicon Breather Hoses,Silicon Vac Hoses, Top Mounts & Bushes All Round, Catch Can Install,  New Discs and Pads All Round, A Big Sub, A SH*TLOAD of Polishing and A Thirst For V-POWER! Profile/msg for info!

Offline richw911

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #3 on: 05 March 2012, 11:49 »
N75?
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Offline Big Tone

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #4 on: 05 March 2012, 12:57 »
Quote from: richw911 on 05 March 2012, 11:49
N75?

Would that not throw a code?
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****FOR SALE**** 11 Months MOT, 5 Months Tax - 1.8T AUM, Stage 1 map, Lowered 35mm on Jamex Springs, Smoothed Airbox, Pipercross Panel, Forge 007P, N249 Bypass, Silicon Breather Hoses,Silicon Vac Hoses, Top Mounts & Bushes All Round, Catch Can Install,  New Discs and Pads All Round, A Big Sub, A SH*TLOAD of Polishing and A Thirst For V-POWER! Profile/msg for info!

Offline richw911

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #5 on: 05 March 2012, 13:20 »
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Offline Hulmie

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Re: LOW Boost - NO CODES - A process of elimination list.
« Reply #6 on: 05 March 2012, 21:45 »
Faulty Maf - No code or management light
Low Fuel Pressure - Limiting the boost. Not sure if a code will come up.
Weak Actuator - Not holding the wastegate when in boost.
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mk4 R32 Golf, Reflex Silver, V6
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