Trafic poor power at low revs (solved)

2008 Trafic 1.9 diesel

Was running fine, then had new timing chain fitted and after that noticed no low down grunt / power under 2000 revs.

Thought at first chain maybe put on wrong. But did not look into that.

Then checked all air intake hoses for leaks. No difference
Then took off MAFF sensor and cleaned it. No difference
Then bought new turbo boost sensor. No difference
Then did injector bleed test. Found number 4 was leaking back.

So decided leaky injector was dropping pressure in common fuel rail causing lack of power.

Had to decide what to do and in end because mileage was high 260k not worth spending money on engine. Better to fit brand new engine.

Fitted new EGR valve with new engine and new Turbo.

No difference. Still lack of power at low revs :(

ffs

Only thing wasn't new at this stage was MAFF sensor.

Fitted new MAFF sensor. Sorted :)

ok long way round for short cut. But I have perfect running brand new engine. Lovely.

But recommend always try MAFF sensor. Even just borrow another one for a trial.

Trafic poor power at low revs (solved)