Intermittent missing

[dantheram]

Evening,

What is the most common cause of misfiring - vcds is showing miss fire on 3 cylinders. P0301,P0302 an P0303.

Its very intermittent and seemingly worsened with rain - I think it's therefore electrical, coil pack??

Any ideas?

[alexperkins]

These cars don't have a coil pack. They have a DIS module (distributor less ignition module)

It could be that causing the problems

[dantheram]

i'm going to douse the engine bay in WD to mask the problem - im sure it's water causing the problem as when it's raining is when it occurs.

[dantheram]

i had it today but with only moderate rain - occurs when pressing the accelerator with low revs.

[alexperkins]

What spark plugs are fitted

[funlovincriminal]

Have you checked your ht leads? A couple of mine were split and on a damp day it would missfire

Sent from my GT-I9300 using Tapatalk

[dantheram]

- plugs are Bosch if I recall correctly (not had a prob with these in 5yrs)

- leads were changed 2 years ago and look fine.

Vcds - misfire on cylinders 1,2 and 3. Surely plugs wouldn't have failed on 3 separate cylinders would they?

[alexperkins]

It could be the plugs quite possibly... Plugs only last 2 years realistically.

[dantheram]

Is it best to put ngk ones in?

[alexperkins]

Best to get genuine ones

Ngk triple electrode ones are the standard figment

I used to use Bosch super4s in mine, but went back to genuine ones as they started causing issues.

[dantheram]

Right, replaced the leads and plugs today and noticed a fair bit of oil around the plugs. My first thought was my rocker cover gasket.

Is there a guide to doing the gasket on here or does anyone have one?

Assuming it is that of course

[alexperkins]

Rocker cover gasket is a major task. The cams have to be removed as they run through it!

It's likely the oil has been overfilled and run Into the spark holes

[dantheram]

What's the best way to be sure the rocker gasket is ok/ how can I rule it out, Alex?