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Gtir Motorsport club » Tech room » Help and Advice » boost

boost

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1 boost on 15th September 2017, 8:01 pm

92pulsar

92pulsar
i seem to not be getting as much boost when car has warmed up what should i be checking

2 Re: boost on 15th September 2017, 9:23 pm

nomad

nomad
Admin
Admin
Any more info that's a bit vague ... when you say losing boost how much .... what mods do you have .... does it hesitate etc ???


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3 Re: boost on 15th September 2017, 9:33 pm

92pulsar

92pulsar
No mods that i know of when car is just warmed up im hitting 9-10 psi once its been running 25-30 mins only hitting about 7 psi seems like turbo is taking a bit longer to spool up too

4 Re: boost on 15th September 2017, 11:11 pm

GTI-R US

GTI-R US
Management
Management
Knock sensor, do a fault code check


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5 Re: boost on 15th September 2017, 11:18 pm

92pulsar

92pulsar
Just checked with NSD1 no code will code stay on till cleared car has been sitting for a couple hours

6 Re: boost on 16th September 2017, 10:12 am

nomad

nomad
Admin
Admin
Yeah code will be logged and stay logged until you clear it ...


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7 Re: boost on 16th September 2017, 11:01 am

Cosmic73

Cosmic73
Cold be an air leak. Check your pipes for splits and loose jubilee clips etc. A pressure test and fairy liquid would confirm it.

8 Re: boost on 16th September 2017, 12:03 pm

Stu

Stu
Admin
Admin
Interwarmer? (Tmic)
When you say when the engine is warm. Is that just normal running temperature or after you have been boosting or sat In trafic?


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9 Re: boost on 16th September 2017, 1:18 pm

92pulsar

92pulsar
Top mount and being warm not anything extreme but a good pull or 2 then basicly normal driving

10 Re: boost on 16th September 2017, 6:38 pm

Mr B

Mr B
gtir technician
gtir technician
knock sensor will have no code unless circuit or sensor fault that puts it out of resistance spec (resistor inside knock sensor is to aid ecu in monitoring basic circuit integrity and that controls the fault code 34 status), can be signalling knock and it has no code logic for knock detection or whether it actual knock or false knock so ideally need monitor sensor output or timing .
could be boost leak when joint hot.
could be following playing up when hot  wastegate, actuator, casting cracks, turbo shaft assembly drag .

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