2.0tsi 190 'misfire'

[SouthernSeat]

Hi all,

My 2.0tsi 190 (dsg) has a misfire/hesitation that comes and goes between about 2k-5k revs, most noticeable on the motorway when overtaking (although so far I've replicated the issue in 3rd, 3th and 5th).

It happens between half and full throttle in both D and manual mode and I've checked the RPM's and can see it isn't the clutch slipping.

There is no EML or fault codes present (or any that carista is showing).

A couple of weeks ago it had a service (including spark plugs) and the Thermostat housing replaced under warranty.

I didn't notice this problem before it had this work done...

Before I take the car back, has anyone else experienced this? I have a feeling they won't be able to replicate it and I don't want to be slapped with a £150 diagnostics fee!

 

[SouthernSeat]

Managed to get it to misfire enough to get some fault codes:

P030000 - Random Misfire Detected: No Sub Type Information

P030200- Cylinder 2 Misfire Detected: No Sub Type Information

Anyone had these before?

 

[SuperV8]

The P030000 has many possible causes.
P0302 looks like it could be either Camshaft position sensor - inlet, Crank shaft position sensor or Ignition coil 2.

If this fault only developed after new spark plugs - can you check that they plugged the coil pack back in correctly/firmly?

With a suspected coil pack fault, you could switch around your coil pack to a different cylinder - to see if the fault moves to a different cylinder?

 

[SouthernSeat]

I've had a look and found some dielectric grease (looked new combined with old crusty stuff) on the coil pack spring and end of the No. 2 spark plug. I cleaned it off (did all 4 actually) as well as giving the contact plate of each coil pack a clean with some contact cleaner on the end of a cotton bud.

After a test drive it seems all ok again but I'll update this thread for future reference.

 

[mty12345]

I've had a look and found some dielectric grease (looked new combined with old crusty stuff) on the coil pack spring and end of the No. 2 spark plug. I cleaned it off (did all 4 actually) as well as giving the contact plate of each coil pack a clean with some contact cleaner on the end of a cotton bud.

After a test drive it seems all ok again but I'll update this thread for future reference.

Not sure why people insist on putting dielectric grease on stuff like that Glad you got it sorted

 

[SuperV8]

Not sure why people insist on putting dielectric grease on stuff like that Glad you got it sorted

Agreed:

 

[SouthernSeat]

I would imagine a small amount on the porcelain part of the plug to stop the coil pack boot from sticking is all you need, if any.
The service was carried out at a main dealer as well .

 

[nd-photo.nl]

I used high temp ceramic grease for that exact application, works great