Another guy came in to get an ECU tune on his 2008 Xk. I quickly checked it over, ran some basic diagnostics. He had all kinds of Cel codes. Under the hood I noticed: Spectre intake filter and 200kpa expansion tank cap, I told him it's not what Is supposed to be on there and for safe measures he should get the properly rated cap of 120 kpa. ( I myself run 110kpa)
Also I noticed that his fuel trims were as high as + 25 with the car idling. I told him about this And that MAF might be suspect or a possible vacuum leak. He told me he replaced maf sensors , And he starts bragging how he saved a bunch of money by not buying a Jaguar part but buying maf on Aliexpress instead , he went on and on how they are all the same and oem is a waste of money. I tried explaining but He didn't want to listen to My attempts to explain why a properly calibrated MAF
sensor is very important and each car intake is different, I tried and tried. Very interesting when someone is trying to teach you the opposite from what you know damn well from lots of experience 🤣. At the end I gave up, I told him hey fix your car and when it runs properly you can come back to get a tune. He actually appeared mad that I couldn't tune his car with his perfectly working AliExpress maf unit, 200 kpa expansion tank cap, Spectre intake and who knows what else is going on there. He also thought I can just Tune the ECU and get rid of all his check engine lights as well. He think I do magic I suppose 🙂
After he left I got a text message
See screenshot..
😁 😁 Cant argue with an expert customer I guess 😊😉
Some people!!!

 

Of course you took the opportunity to tell numbnutz about the forum...right??

 

There is no point, he thinks he knows it better than anyone else. I just told him . " I can't argue with you, just Google it"

 

Be thankful you did not do anything for him, that is one you’d want to avoid not worth the hassle you would
most definitely encounter afterwards.

 

💯 That's why, to encourage him, I showed him my agreement which basically says I'm not responsible for car blowing up due to stupidity in maintenance 😁