Missing at high RPM
 

First off i need to discribe my car
86 mild streetport, Bonez 2.5" race pipe, Dynomax dual catback, took off all the airbox and put on a K&N cone and left the snorkle, ACV, EGR block-off plates, took off 2nd throttle actuator (not the butterflys), only run 91 octane, 30k on the new motor, always warmed up and always cooled down.

This has been bugging me for months, and I just cant figure it out. When I get into the 6-7k rpm area at full throttle, it seems like my car runs out of fuel of something. I changed the pump to a Turbo pump, and put GSL-SE injectors in the secondaries (680-720?). That worked, but only for a month or so now it does the exact same thing. could this be something clogged or getting dirty??? It had a new fuel filter from RP a month before this started happening, but before that the car was sitting. It could also be sucking warm air (working on a box for it) because when its cool and humid (early morning) it never does it. please help me, this is bugging the crap out of me

could be that you're running TOO rich...

I wouldn't think that n/a would need MORE fuel. All the tuning I've seen with them is people using s-afc's and turning fuel DOWN...:confused:

i would have to agree with jspecracer7 ~ running TOO rich is definitely a possibility and worth looking into. however if it turns out to be a lean problem, then check to make sure your 5th and 6th ports are opening, and also see if you can monitor the fuel pressure more precisely ...

maybe invest in an air/fuel meter or an exhaust temperature gauge (one or the other, both might be overkill)

check your plugs to see what they reveal (lean vs. rich). also, you might want to try using some hotter plugs (from a Gen I) and see if that helps.

well i did it with stock injectors and the 680s help it out. The aux ports are gone BTW. sorry i forgot that