hi, im using 4g92p sohc ecu..it is possible to tune my stock ecu and check the AFR/ignition problem??
coz i hv a problem wif my car when speeding at 100+km/h, got soung like bell,"krenngg krengg" and i felt the power...
i installed a tweeter by myself and i satisfied the sound that i can hear. but once i start my engine while its running, tweeter sound out very soft titititititititititi...... while the cd is playing then i shut off...