ignition amp playing up it will miss fire and sound like a retarded scooby. Dv playing up you wont get the hiss noise after letting off the gas you get a chatter/flutter noise. Boost leak from pipes ,look for a oily boost pipe (best look by intercooler).Spark plug gone ,you will be lucky to get out of second gear.

All these have no fault codes.

All happened to my 1999 AGU.

Timing out you get a fault code.

but it will be cam shaft sensor as r-tech found when mapping it.
