Egg smell, slight misfire at idle, EML light on - 172

[Jackpilk]

As stated in the title!

I'm thinking the CAT is dead. However after doing some homework I've noticed that misfires can cause the above.

It was serviced a few months ago however the HT leads have never been replaced and it's on 93k now, worth doing?

Has anyone had similar problems?

Thanks

 

[l33th3tr33]

I had the egg smell, and in the end turned out to be the HT leads had been put in the wrong order without my knowledge, I went through HT leads, coilpack, plugs and injectors before I even thought to check.

Just food for thought.

 

[m4tt274]

i have a friend with exactly the same symptoms.

Fault code was dp308 iirc. Was a sensor on the inlet.

Think petrol in the cat is what makes that eggy smell.

 

[l33th3tr33]

It would be, mine was running on 2/3 cylinders so chucking fuel into it.

 

[Jackpilk]

New leads and plugs however the problem is still there.

I removed the coilpack and it has huge cracks all around it. Inside one of the terminals it's a dark brown colour compared to the other three which look ok.
Is this the issue staring me in the face?

 

[Harbinger]

Probably sounds corroded. Are the leads on in the right order?

 

[Jackpilk]

Yes 100%

Number 4 closest to Cambelt .

And the leads on the coil-pack are labelled

 

[sam_clio182]

If the coil pack is cracked could be the problem mines was ages ago put a new one on problem solved!

 

[Jackpilk]

A New set of leads and coilpack and there was still no change!

So I took the Subaru sounding Clio to my friends garage and we plugged it in, it came up with :

Injector circuit - Cylinder 4 open

So I replaced injector number 4 with a new one and It's running better than ever