Mk5 power loss and rough idle (erratic)

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Turbophonic
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Mk5 power loss and rough idle (erratic)

Post by Turbophonic »

Hi all,

Require some help please.

My wife's car (2007 mk5 Golf 2.0 trendline NON-FSI) has started to pick up a rough idle (comes and goes) and when you try to accelerate, it seems to be running on 3 cylinders.
Have tried pulling codes, system says "no codes'. Changed ignition module, no change. changed plugs and leads, no change, full major service done with cambelt with spark plugs etc, still no change.

Any other ideas what it could be?

Much appreciated!
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panic-mechanic
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Re: Mk5 power loss and rough idle (erratic)

Post by panic-mechanic »

compression test
injectors
pcv
Stephan van Tonder - Jhb - Putfontein Benoni
'05 Audi A6 3.0L TDI Avant
'09 Touareg 3l TDI
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
Turbophonic
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Re: Mk5 power loss and rough idle (erratic)

Post by Turbophonic »

Pulled some codes again , got the following:

Cyl 1 : 17763, P1355 (Similar code for cyl 3 as well).

So cyl 1 and 3 on an open circuit.

Checked the codes on ROSS-TECH and they advise regrounding the coil pack as the open circuit is due to weak/faulty coil pack.

Anybody have an idea on how to do this? searched on Google but cant find a wiring layout for the single coil pack on this BHY engine.

Once again, many thanks
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