veigy Posted August 7, 2019 Report Share Posted August 7, 2019 Hi,I have a problem on Lupo 1.0 AUC 37kW with fuel mixture. VCDS showing error:17560/P1152 - Long Term Fuel Trim Additive Air; Bank 1; Range 2: System too Lean17573/P1165 - Long Term Fuel Trim Additive Air; Bank 1; Range 1: System too RichAfter clearing these errors they comes back in few days. In a month comes on engine light too. Last time I cleared errors I looked on oxygen sensors learning values: -6% on idle and +24% on partial load. The strange thing is that readiness is absolutely OK. Any suggestions? I'm little bit helpless at this moment.What have been done:- new oxygen senzor- cleared throttle body- replaced some bad looking hoses- cleared manifold preassure senzor- changed fuel filterPics from VCDS there: https://imgur.com/a/ZehuiX5 Quote Link to comment Share on other sites More sharing options...
Sausage Posted August 7, 2019 Report Share Posted August 7, 2019 http://wiki.ross-tech.com/wiki/index.php/17560/P1152/004434 Look for air leaks. Quote Link to comment Share on other sites More sharing options...
veigy Posted August 7, 2019 Author Report Share Posted August 7, 2019 I have been looking for air leaks many times... I replaced some hoses which I found to be problematic. Quote Link to comment Share on other sites More sharing options...
mk2 Posted August 7, 2019 Report Share Posted August 7, 2019 Do you have a carbon canister? Could be the solenoid. Could be fuel pressure regulator? Check vacuum hose to brake servo... or could be dodgy brake servo where the internal air valve is leaky, allowing extra air into the engine? Try disconnecting it temporarily (and block the suction). might be more than one problem. Quote Link to comment Share on other sites More sharing options...
veigy Posted August 7, 2019 Author Report Share Posted August 7, 2019 Yes. I'm planning to test that. How to test fuel regulator? Ok. What happens when I disconnect pipe to servo? Quote Link to comment Share on other sites More sharing options...
mk2 Posted August 8, 2019 Report Share Posted August 8, 2019 Easier to swap it than test, without the right equipment. Otherwise you might be able to rig up a tyre pressure gauge to the output pressure side. Input pressure should be at least 60psi. Not sure what the controlled pressure is on your model. 45psi? But whatever it is, it should be steady. No brakes (very high foot force needed). 1 Quote Link to comment Share on other sites More sharing options...
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