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Model specific boards => Golf mk4 => Topic started by: rfn_hodgson on 22 December 2013, 22:19

Title: Think my car is over boosting
Post by: rfn_hodgson on 22 December 2013, 22:19

As above lads I think my car is over boosting..... Before it used to peak at 20-21 psi then fade out but now I have noticed that it is reaching 25-27 psi

Only really noticed this since doing ultimate vac delete and front mount

What could be the possible out come to this and what sort. Of parts would I be looking at to replace if needed?

Once again thanks in advance :)

Title: Re: Think my car is over boosting
Post by: Scott D on 24 December 2013, 00:33

rough guess but could well be a boost leak causing it to overboost in order to make requested amounts.

Title: Re: Think my car is over boosting
Post by: Wazzzer on 24 December 2013, 08:52

Is the MAP sensor plugged in

Title: Re: Think my car is over boosting
Post by: rfn_hodgson on 24 December 2013, 10:18

The map sensor is plugged in as I've got the part of the s3 piping were the map sensor goes

And boost leak...... I've gone over all boost pipes and made sure they are all tight joints... There is pretty much no vac lines left apart from the obvious and those are all secure.

Any one know were I can get a smoke pressure test done?

Title: Re: Think my car is over boosting
Post by: Wazzzer on 24 December 2013, 11:05

You shouldn't overboost as the MAP sensor should tell the N75 via the ECU to ease off the boost...

Title: Re: Think my car is over boosting
Post by: dom on 24 December 2013, 11:23

Quote from: Wazzzer on 24 December 2013, 11:05

You shouldn't overboost as the MAP sensor should tell the N75 via the ECU to ease off the boost...

Faulty N75 then?

Title: Re: Think my car is over boosting
Post by: Wazzzer on 24 December 2013, 11:31

May well be, would be worth trying a working one off another car if poss