New lambda, idle speed the same as unplugged.

[Justin14100]

Before I found out what my major over-fueling was my idle speed was around 900ish which i set it at.
I unplugged the lambda while in france to try and salvage some MPG and find a solution to the problem and it fixed it, though my idle speed went up to 1100-1200rpm which i just presumed was normal; a little like unplugging the blue temp sender.

Got an NGK one all plugged up and earthed, idle speed was about 900 when i first fitted it and now its up at 1100-1200ish again - when i unplug it, the idle speed remains the same. this normal? was the faulty one just lowering the idle speed?

Thanks!

[hayesey]

whats the fuelling like with the new lambda plugged in?  if it's ok then I'd just adjust the idle to normal level using the idle screw on the throttle body.

[Justin14100]

Same as without it i think, obv masses better than the 17mpg with the faulty one on. got about 28mpg crusing at 90ish and a few blasts.