I put the engine back together the other day.
Started fine etc, no probs.
I went for a ride today and it runs like crap. According to the AFR it ranges from lean to dead-lean, irrespective of idle, load, even boost
The strange thing is when the engine is cold, it performs fine. It gets stoich easliy, rich under (moderate for now) boost.
But after 5-10mins it goes into lean mode and the AFR shows blank or 1 red light. not nice.
There are no fuel smells anywhere. Fuel filter is new, injectors are Bosch reds (clean etc), no fault codes, WTF?
Any ideas would be welcome.