A4 BLB Jerking on boost....VCDS only reads glow plug fault

Phatboyruss1

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Hi, I have a 2005 A4 Avant.

When driving the car as it comes on boost the car "jerks" about and it feel like its hesitating. The car still accelerates but jerks, it does this in 2nd, 3rd and 4th... haven't been able to test in any other gears yet.

I've had a VCDS scan and all that comes up is an intermittent fault with glow plugs 3 and 4

I've had a search on here but they all have other issues as well as this. EGR, Inlet.......?

Thanks in advance

Russ