so to conclude . we are thinking there may still be an air leak (vacuum) before the maf somewhere ?
assuming there arnt any physical engine problems fundanentaly that can cause this then this leak could be a number of (already checked too ) items.
inlet manifold -to-head.
injector manifold and injector seals to manifold.
breather seperator box,breather plastic top section,hoses and various 'o' rings associated with .
anything allowing extra air through the physical engine breathing such as rocker cover leaks.oil filler cap,dipstick etc
rings/seals on throttle body.
splits in the concertina hoses from throttle body down to front before maf.
connection to brake servo and vacuum take off to storage vessels .
thats a list which springs to mind . there may be more items ( or possibilities for the syptoms.for eg . what would a partially blocked exhaust show as ? what would a poor air filter or blockage show ?)
these are areas that i will be checking on mine too when i next do the cambelt as i have a +3% ish LTFT on mine which seems to affect nothing but i would like to reduce (most garages are telling me that within 10% is no issue anyway ) but im being told on here that it should be zero.
I am sorry @cam.in.head, I think that we are mixing both cases, maybe you can open a new post to make sure there is no confussion between both cars.
In my case, original poster here, I still have errors P0170 and P0173. The car is still running smoothly with no fault symptoms and my mechanic gave up as he can't find anything wrong to repair.
Would it be a good idea to try an injector cleaner like Liqui Moly Injection Reiniger?
I am also planning to change the air filter.
Best regards.
