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Vr6 coil pack problem


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Ive recently bought myself a 2.8 vr6 mk³ golf highline 

I bought the car wiv spark plug issues I've replaces the coil pack the ht lead and plugs 

Started the car with all new bits on started lovely running like a dream  took it up.the Road for a test drive . When I come back car sounded different so checked and is now only firing on 5 any help please 

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Hi Martin,

Do you know which spark plug isn't working?

You could disconnect each plug in turn from the coil pack and the one that makes no difference is the one to investigate.

 

The problem could be:

- one of the spark plugs - maybe it has a cracked body or the gap not set correctly?

- an iffy lead (unlikely)

- an iffy contact between the plug and lead, or lead and coilpack (more likely - it worked until normal vibration made the connection loose?).

- the coilpack (unlikely) - the spark plugs work in pairs

 

You could remove each spark plug in turn (ground the metal part to the engine and crank the engine over. You should see each one spark clearly.

 

Don't go buying replacement parts until you understand the problem and can prove it to yourself.

 

Let us know how you get on. Have fun!

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