Stuttering with high acceleration - engine light on, some fault codes...

[Mewcenary]

Hi,

My Leon has started stuttering on high acceleration. If driving around 'normally' she is just fine, but hesitant when the foot is pushed down.

Fault codes are as follows. I've cleared them and the engine light goes off again, but I'm sure it will come back soon....

Note that this started following a service. Normally, that garage is pretty good, just wondering what they might have done... dodgy spark plug etc? I will pop it back, of course...

Thoughts?

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3 Faults Found:
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
16687 - Cylinder 3 Misfire Detected

 

[RICKY3]

Coilpack not pushed fully home?


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[Mewcenary]

Coilpack not pushed fully home?


Sent from my iPhone

Got a good link for how best to check that?

I've had a coilpack fail completely before. Well, a few times That was very dramatic - limp mode, flashing engine management light. This seems a little different. Note if I REALLY try and floor it and make the engine unhappy, the light will flash for a bit...

 

[RICKY3]

I would just look at all coilpacks and see if No3 is sitting higher than the rest


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