emissions and revs
Hi all - I wonder if you can help. I have a 1998 146 1.8 ts plastic top which i have just put in for an early mot and it failed badly on emissions due to a very high o2 reading. Coupled with the fact that its very hard to hold the revs steady between 2.5 and 3 thou needed for the test. I have checked the maf and cleaned inside the throttle body.
Suspicion seems to falling on some kind of leak around the inlet manifold or breather pipe or a failing lambda - revs are fine at every other point, if a little high on idle but once i hit 2.5-3 thou they try to die off and flicker until i can get over 3 thou.
Any ideas or help would be appreciated - thanks