Pressure drop along fuel rail?

stevieturbo · Post by **stevieturbo** » Thu Sep 18, 2014 8:22 pm

Spraying easy start around the intake and listening for engine rpm rise is a good way to check for leaks

If you swap lambda sensors side to side, it's still the same bank ?

Extreme idea....swap 4 injectors side-side ?

dnb · Post by **dnb** » Thu Sep 18, 2014 9:08 pm

There's a couple of places on the inlet manifold I can't easily get to with easy start. It's non-standard - a single cylinder tract leaking might explain the symptoms - the lambda would then average to being "slightly wrong" over 4 cylinders when it's really 1 being a lot wrong.

The lean side is always the even bank, no matter what lambda sensor I put in.

I haven't swapped the injectors, but it's the sort of thing that's easy when I'm taking stuff apart.

dnb · Post by **dnb** » Sat Sep 20, 2014 9:03 pm

Found a couple of things... But nothing that explains everything yet.

One of the thermocouples in the exhaust was leaking a bit, so I fixed that. No significant change.

The car had its MOT today (and passed) so I can get some miles on it and get to the bottom of the problems.