Iv'e been having problems with partial throttle misfire. It mostly happens after the car is driven over 15 minutes. WOT feels fine it's only partial throttle that's the problem. Here's my set up:

Full-Race kit
Flashpro
E85
Deatchwerks 1300 injectors(new)
Ngk8 ird plugs (new) gaped at .023

Have six error codes:
misfire cylinder 1,2,3,4
random misfire
evap emission control code P0455. Anybody Know what this is?

Thing I'm planning to do:
disable primary o2
Install Kenne Bell BAS
Any other advice would be appreciated. Thanks!

 

Post a log with timing, AF, and MAP when its happening. That will help us help you.

 

I doubt your problem is weak spark if it does not misfire under load

 

that's what i was thinking too. maybe i don't need the BAS. Do you know what this error code "Evap emission conclol" is?

 

It is something likely not related to your problem. Something must be malfunctioning in the evap system.