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Model specific boards => Golf mk4 => Topic started by: daddy5x on 22 May 2014, 18:13

Title: mpg
Post by: daddy5x on 22 May 2014, 18:13

 :cry:ive removed and cleaned my throttle body  replaced gasket and now it seems im getting less mpg    it says 18mpg  now   :sick:  any help/advise realy appreciated

Title: Re: mpg
Post by: dom on 22 May 2014, 20:27

Did you realign the throttle body with vagcom?

Title: Re: mpg
Post by: daddy5x on 22 May 2014, 20:29

no I didn't dom       I thought it would do its self after a few miles     !

Title: Re: mpg
Post by: northeast_gti-t on 22 May 2014, 20:36

As dom has suggested re-align t/b with vag-com is best,although the ecu usually adapts with a few miles of driving too,i would scan for any fault codes also first up and go from there.

Title: Re: mpg
Post by: daddy5x on 22 May 2014, 20:42

ive got my cable for vcds   coming over weekend  ill post back with any findings thx fellas

Title: Re: mpg
Post by: northeast_gti-t on 22 May 2014, 20:48

good work :afro: Some good info here : http://www.ross-tech.com/vag-com/cars/vwmkIV.html
                                                      http://wiki.ross-tech.com/wiki/index.php/Category:Fault_Codes

Title: Re: mpg
Post by: dom on 22 May 2014, 22:14

Based on your sig, you have an AUM which will definitely need it realigned by vagcom.

Title: Re: mpg
Post by: daddy5x on 25 May 2014, 18:56

thx fellas ive now realighned with vagcom      :smiley:

Title: Re: mpg
Post by: Bandit127 on 25 May 2014, 19:14

While you have the vagcom kit out, check the water temp sender is giving reasonable values.

And go back over the throttle body work and make sure you haven't created an air leak.

Title: Re: mpg
Post by: daddy5x on 25 May 2014, 21:55

how would I do that  this vag com is new to me   what would be reasonable values     thx

Title: Re: mpg
Post by: Bandit127 on 26 May 2014, 07:05

Perhaps start by scanning for stored codes if you are new to Vagcom (actually VCDS).

If you want to dig about then the coolant temp can be found on this chart:
http://www.ross-tech.com/vag-com/m_blocks/001-009.html (http://www.ross-tech.com/vag-com/m_blocks/001-009.html)

With the engine fully warm you should see 85-95°C. Less than 80° suggests the temp sender and/or thermostat.