,,,,,,,,,,,,,,,,,have you adjust the timing with timing gun ? you said its 20 and 27 on petol and gas respectivelly,,,,,,,,,,,,,,,how you can say that ,,,,,,,,,,have you check that by reading the degree marks ?,,,,,,,,,,,,,,i am not sure buy i guess the ignition timing on cultus cant varry from 0 to 27 ,,,,,,,,,,,i will adjust that on my car soon then i will be sure whether i can varry in that much range ,,,,,,,,,,,,,,,,
but the original ignition timing on cultus is 8 DBTC , and you set it on 20 BDTC on petol,,,,,,,,,,,,and also the degree marks on crank shaft pully also ranges from 0 to 10 BTDC , thats confusing ,,,,,,,