MAF question

[Rusty]

00561 is usually a boost leak

[Dingo]

I hope not because i've replaced all the boost hoses with samco's
renewed all the small bore vac hoses
done the mark H mod & a new O ring
renewed all the injector seats
and I pressure tested it up to 1.5 bar
But you never know with these cars so I will test again.
This code 00561, could it be "lean up top" or is it allways rich, I'm only thinking this as I noticed my fuel pump is a bit noisy now, is a good standard ABY pump good for 300hp ?

I will have another go at it this week but I'm not too bothered as its running fantastic at the mo, now i've replaced the coils, plugs & boots.