Random misfire a3 1.8t agu
got my head the other day off mush and eveyrthing is running sweet apart from a random misfire, started up yesteeday morning and tryed to set off and started misfiring and cut out, started it back up and came home and eventualy stopped misfiring. switched it off and made sure all pipes were connected properly and leads to coil packs were connected properly. everything seemed fine and took it round block and was spot on, so desciede to take it for a good run and did 60 mile with not hitch apart from it not boosting properly, normaly boosts to 1 bar and is only boosting to 0.7-0.8. anyway got up this morning and did about 7 mile and was coming to end of dual carriage way and started missing again then cleared again as i was going round the round about then did it a further 4 times till i got home (4 mile)
anybody got any sugestions, i have changed the spark plugs tonight for some denso one's and still does it, have disconected n75 which oviously drops it to actuator preasure which seems to be about 0.4 - 0.5 bar so i no that is doing somthing lol, i have also pluged into vag-com and doesn't bring any faults up at all, i would of thought that if one of my coil packs were down it would throw a fault code what do you think?
LOW BOOST NORM 1 BAR NOW 0.7 - 0.8 BAR
any help would be most appreciated, thanks