I've got a 93 JDM H22 in an EG and I noticed one day it wasnt pulling that hard anymore. Changed the old spark plugs which were covered in carbon and used NGK Iridium and same thing within 2 weeks I lost power again and the spark plugs were covered in carbon again. Motor doesn't burn much oil either so I don't understand. I also ran seafoam carbon cleaner on it a few weeks ago. What could be the problem?

THanks

 

what ecu, inejctors and fuel pressure are you running?

 

p28 skunk 2 program, stock injectors, stock fpr

 

the ecu is the problem, its giving you too much fuel. get eh p28 tuned for your set up or at least have an H series base map put on there.