missifre after wot

[mexicanzero]

so i'm having a messed up annoying issue
everytime i accelerate for a sustained period of time from say 20 to 90km/h at or near wot (full boost) the car will accelerate great lots of pull no loss in power at all at any time, and then i let off the gas and coast to a stop at a red light or re accelerate the car missifres.
the thing is it clears up after 10 or so seconds of stoping. so there isnt enough time for me to get out, pop the hood and unplug injectors to figure out which cyl its coming from.

the weirdest thing is it only happens after sustained periods of wot, it doesnt happen if i go from 0 to 60km/h

it feels like a flooded cylinder. so i've changed the plugs gapped them to 28 and 35 thou with no difference (the plugs i took out didnt look bad just a bit lean from when i had an intake gasket leak). my coil is an msd coil which is pretty much new, i did a motovac on my car to clean out the injectors (which are not the originals), my wires are i think about 2 years old but look in good shape.
my car idles rock solid and smoothly at 700rpm in park with 19 inhg of vacuum.
regular everyday driving with sustained part throttle acceleration is fine, smooth and issue free.

any ideas?
-Alex

[Huffer]

Fuel filter? Even a new fuel pump...

I was going to suggest a clogging injector that is slow to respond, but you said they're clean. It could still be faulty.
If you can datalog the problem that would narrow down the mis-fire on the cylinder.

[rad rex]

I have a similar problem, but it does not happen with regularity. When it is wet out it generally happens. I have changed everything including the fuel filter, I'm going to swap fuel rails next and see if it misfires on the other side. I'm suspecting it's the case

[mexicanzero]

fuel filter and pump are fairly recent filter is oem and pump is high flow walbro, i can not see them being a cause of the issue. i was thinking of taking the injectors out and having them cleaned on an off car machine that actually flow tests them and verifies propper spray pattern. motovacs help but arent perfect.

if only i could figure out which cylinder it is then i could swap over stuff to others and see if it follows. i pulled the spark plugs again today and they look fine, all the same with no abnormalities...

grrrrrr


-Alex