Okay, may need a bit more help now. It appears the stutter hasn't gone away now so the symptoms have changed slightly. No fault codes shown from my friends obd reader, but it was struggling to connect.
The car doesn't stutter on the initial 30 seconds from a cold start but is really apparent until ten minutes of driving has passed and the car is properly warmed up.
Doesn't seem to be a misfire as the engine still sounds pretty smooth. However the revs rise to 2k rpm then there is a slight interruption and they drop slightly.
When it does this you can hear a slight click under the bonnet possibly a solenoid or something.
I have already changed the oil, spark plugs and also bought a coil pack which I swapped around all the cylinders in the hope a pack was beginning to fail.
I also cleaned the throttle body and maf sensor.
Any experts on here that can shed any light on this or anybody whose had the same problem? Don't want to spend silly money changing everything when its probably just a sensor.
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