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 Turbo "poppin" and over-boosting View next topic
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Geeman
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Car: '99 S4 Avant

Joined: 11 Aug 2009
Posts: 751

Location: Grimsby

PostPosted: Tue Sep 16, 2014 4:44 pm  Reply with quoteBack to top

My 1.8T is fine if you feather the throttle... and it pulls great.

However, if you accelerate harder (in any gear) then it just "pops" and doesn't want to boost at all.

Any ideas off the top of your head?

Cheers,

Giles

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ScottR
Veteran


Car: B5 S4

Joined: 22 Apr 2008
Posts: 8375


PostPosted: Tue Sep 16, 2014 4:48 pm Reply with quoteBack to top

EGT sensor on its way out can do this.
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Geeman
knowledgeable


Car: '99 S4 Avant

Joined: 11 Aug 2009
Posts: 751

Location: Grimsby

PostPosted: Tue Sep 16, 2014 4:52 pm Reply with quoteBack to top

Not a MAP sensor or a vacuum leak?

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ScottR
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Car: B5 S4

Joined: 22 Apr 2008
Posts: 8375


PostPosted: Tue Sep 16, 2014 5:03 pm Reply with quoteBack to top

Sorry, didn't see the overboosting bit!

Yes, much more likely to be N75 or turbo control line. Could also be a boost leak.
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Cheempeej
knowledgeable


Car: RS4
Power: Some
Torque: Many

Joined: 27 Jun 2013
Posts: 669

Location: Thurso!

PostPosted: Tue Sep 16, 2014 5:06 pm Reply with quoteBack to top

No codes on VCDS?
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Gops
Brand New, Welcome :)



Joined: 22 Feb 2015
Posts: 5


PostPosted: Sun Feb 22, 2015 4:18 pm Reply with quoteBack to top

When I had this it was a lean misfire. Check your hose to the FPR.
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