Hi,

I bought a second hand 2009 Corsa D (68K miles) a few weeks ago, it drove perfectly for the first couple of weeks and this week it gradually started to stutter/judder under load/acceleration, usually at relatively low revs when accelerating in 2nd/3rd/4th it will either stutter while accelerating or not accelerate at all, needing a shift down to make progress. This happened very intermittently at first but over 3 or 4 days it has gradually got to the point where it is happening continually from a few minutes into the drive. It seems to idle OK when first turned on but after driving and experiening the problem the idle is then also bad after stopping:

Rough Idle: www.youtube.com/watch?v=SMnY-t8Uw4Q

I did the pedal test to read a warning code from the dash engine management light:

www.youtube.com/watch?v=0DaFQZFkrT0&feature=yo...e

It seems like the code is maybe 5865 but all the codes I've found online begin with 0 (10 flashes) or 1 (1 flash), so the flashing of the light in this case as shown in the video doesn't seem to make any sense.

According to its service manual it had new spark plugs 6 months/5K miles ago. Coil pack seems to be a very common fault on this engine, so I took it out for a visual inspection, and it seems perfect, no corosion visible on the coils in the coil pack or top of the spark plugs, see here:

www.youtube.com/watch?v=KGilyrOOPSM

Any advice on what and how to get any further in diagnosing the problem would be much appreciated!

P.S. - No warning lights have ever illuminated on the dash since the problem appeared.

Edited by JPJP on 03/02/2018 at 15:27