i started my s14 today for the first time in a while.changed the oil+filter,cleaned air filter and new battery.started it up was ticking over very rough would rev up to over 2k revs and drop very low and nearly cut out and kept going like that took it for a drive and it went grand but when came back and parked and same thing again.was thinking maybe a boost leak or dirty afm.will have a look tomorrow after work what else will i look out for