Running rich and lumpy idle

[bulbsubaru]

hi guys just bought a 182 with an injector fault p0303, moved the injector to cylinder 4 and got p0304, I changed the injector today and the misfire has gone! but iv still got a lumpy idle and a strong smell of fuel, the car cam with a full k-tec system with decat, so I don't know if this will affect it? any ideas guys? did a live read on the diagnosic and the values were way out.

 

[Cupman29]

I would check the first O2 sensor next then.

 

[bulbsubaru]

Gonna take the O2 sensor off and give it a clean as I don't know how long it's been over fueling before I bought it, got a seal for the inlet manifold on order just in case there's an air leak between the rocker cover and manifold, hopefully this will sort it?

 

[Cupman29]

It's a map sensor that's used on these cars so won't be the inlet to head gasket as it's working with pressure and not flow.

In my experience, O2 sensors usually need changed rather than cleaned but worth a try.

 

[bulbsubaru]

The O2 sensor was changed in February 2014 so it's only 2 year old, would the faulty injector ruin it? It's still switching just at stupid values?

 

[JamesBryan]

These cars are known to go through Lambda sensors

 

[bulbsubaru]

Where is the best place to get a genuine or oem one? EBay?

 

[Jamie182turb]

Also decat system will give a stronger Petrol smell

Probably the lambda

 

[bulbsubaru]

Was gonna get a cat for it but the decat section is sleaved with a u clamp to the centre section!

 

[JamesBryan]

Euro Car Parts do them i think.

Bosch are the ones you want.

 

[bulbsubaru]

Do I need both? Or can I get away with one? Which one should I change front or rear?

 

[JamesBryan]

Just the one before the cat you want.

 

[bulbsubaru]

Cheers James

 

[JamesBryan]

The one before the cat effects the running of the car and the second one does naff all really apart from emissions warning.