citroen xantia almost on fire

iaith · 13 Dec 2009

Hi all. my citroen xantia has recently been misfiring, i drove it about 30 miles today, when I stopped there was loads of smoke coming from underneath. when I looked underneath the centre section of the exhaust was glowing red hot . I tried to start it later but it sounded really rough so I left it . Any Ideas anyone? any help appreciated
Thanks

Burnerman · 13 Dec 2009

Petrol engine? I suspect that your car has developed a misfire due to a faulty coil pack. This has allowed unburnt fuel to pass into the catalytic converter, which has overheated to a large extent, trying to cope with all of this fuel.
When all cool, start the car up and see if its misfiring. The engine will bounce around a bit if it is.
John

^neo^ · 13 Dec 2009

if it's insured, do yourself a favour and let it burn

Think John is on the right lines, either overfuelling or someones been using lead replacement petrol in it

Burnerman · 13 Dec 2009

^neo^ said:
if it's insured, do yourself a favour and let it burn

Think John is on the right lines, either overfuelling or someones been using lead replacement petrol in it

Hilarious

Does LRP have this effect, neo?
John

iaith · 14 Dec 2009

Thanks for the replies Fellas. I feel a trip to the scrappies coming, I had considered helping it burn but I don't think it'll be cost effective. Cheers

^neo^ · 14 Dec 2009

Burnerman said:
^neo^ said:

if it's insured, do yourself a favour and let it burn

Think John is on the right lines, either overfuelling or someones been using lead replacement petrol in it

Click to expand...

Hilarious

Does LRP have this effect, neo?
John

I know cats dont like lead, so presume its the same for lrp?

mointainwalker · 14 Dec 2009

it's true lead destroys cats but only chemically - not physically.

The lead coats the platinum/vanadium and prevents it reating with the exhaust gases. The engine continues to run well ( I believe ) but your emissions soar and you fail your next MOT.

AFAIK, LRP was developed to protect vave-seats in older engines that were previously lubricated with the lead component and would have burnt out relatively quicky without something to repace the PbO.

^neo^ · 15 Dec 2009

I thought the lead coated the platinum and made it overheat?

citroen xantia almost on fire

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