My girlfriend bought a 93 prelude with a skyline gt-r tailight conversion and tons of mods. Guy said he put a new engine in but the engine code is a h22A4. I thought A2 was in 93' preludes. I went to the reference section and there isnt anything on an a4. Any1 know anything about the a4? Also the car gets horrible gas milage, 150 miles on full tank,and has a chipped ecu, dc sprots headers, cold air intake, exhaust, stock fuel pump. Check engine comes on when doing 80+ mph goes off when you turn the car off and when you restart the car it doesnt come back on. Im thinking the chipped exu is making the o2 sensor go bad. Any1think im right? Can I unchip the ecu? or need a new one? thanks alot!