Misfire and Smell of Sulphur

[Hugh Ross]

Hi All
Long time, no post (last post resulted in Richard H advice to replace radiator cap at £10 when OPC wanted to fit new radiators as an £800 'precaution'.)
Have had occasional misfire of late, usually when cold but gone when warm which I put down to lay up over winter/lack of use.
Misfire became permanent at the weekend, emissions light flashing and now on permanently and strongish smell of sulphur in the car after a few minutes of this.
Was only a mile from home so got back on light throttle.
Any thoughts?
Will get to an indy on a trailer to have checked out but any thoughts appreciated.
Thanks
Hugh

 

[RSGulp]

ORIGINAL: Hugh Ross

Hi All
Long time, no post (last post resulted in Richard H advice to replace radiator cap at £10 when OPC wanted to fit new radiators as an £800 'precaution'.)
Have had occasional misfire of late, usually when cold but gone when warm which I put down to lay up over winter/lack of use.
Misfire became permanent at the weekend, emissions light flashing and now on permanently and strongish smell of sulphur in the car after a few minutes of this.
Was only a mile from home so got back on light throttle.
Any thoughts?
Will get to an indy on a trailer to have checked out but any thoughts appreciated.
Thanks
Hugh

I don't know too much about 996s but it sounds like a catalytic converter issue to me. They tend to break down over time and create clogging or back-pressure problems. I'm sure a kettle owner will be able to help in more detail.

 

[Richard_Hamilton]

Could be coil packs. A misfire/lack of spark could be putting unburnt fuel into the cats.

Best get it checked out pronto.

 

[Hugh Ross]

Thanks Richard, are coil packs an engine out replacement?
Don't intend to run it at all until diagnosed/sorted, I was very close to home when it couldn't clear itself - will keep you posted.

 

[devans]

I would also support Richards statement. Had my coils replaced as part of my service. I'm not aware that they took the engine out. Approx £35 per coil at an indie.
Good luck

 

[Richard_Hamilton]

No, it can be done easily without. You have to take them off to change the spark plugs, so it is a regular service item. Unless it's a Turbo, in which case it's a marathon.