Title says it all... Had a minor service coming up for my EP91 and did the usual - oil & oil filter change, spark plugs change, air filter change and a check on the state of my brakes. Problem started after the throttle was cleaned with carb cleaner, from the outside (it wasn't dismantled at all). The car now has an irregular idle that disappears when the car is running at highway speed, and rears its head when i'm in traffic or on low gears (1&2) and driving at a slow speed. Moreover, there's no check engine on the dash. I've tried several solutions: disconnecting the battery for 10-15 minutes, cleaning the whole throttle body, swapping the throttle body with another from a working fine starlet and putting back the old plugs. The problem still persists. I've checked the distributor + lead wires but they're all firing in good order. Did a diagnostics on the car as well but no significant error showed up. Lads, i'm at a loss on what the problem might be. Any advise and suggestion on this issue is welcome. Let's put our thinking caps on Cheers!