Hi everyone not had much sparetime lately and not been using the machine much.
The engine management light came on so I took it into the Jaguar garage where I bought it,still under guarantee thank God.
The cats were blocked would have cost approx £2000 to fix.Done 77,000 miles is this normal at this mileage?

Good to be back Al

 

Ah! What a wonderful opportunity to replace those awful, restrictive factory cats with something extraordinary. And for less money than your dealer wants to charge you for factory replacements.

Here's what you want:

2000-2002 Jaguar XKR Downpipes - Nameless Performance

 

Hi The Coupe Too late I should have posted earlier job already been done.

Would the Nameless cats have got through the emmision test? They are a good value shame I missed opportunity.I wonder whether the agent would have fitted them under warranty?

Thanks again Al

 

Hopefully your mechanic figured out why they failed in the first place. Losing their effectiveness is one thing ( somewhere after 130k or so) but clogging is a sign of something else wrong - excessive oil burning or excessive fueling. Whatever the cause, unless it's corrected you're in for a repeat.

 

Hi Beav I bought the car last October 73000mls.About March time when I started her I could smell fuel for a minute or so.I took it back to have it sorted seemed ok after, but it may have damaged the cats. Hardly using any oil any ideas?

Thanks Al

 

Check the fuel trims for excessive fueling.

Case in point: my Lincoln never had issues, other than a weak battery. Changed it out after a few weak starts, never thought much more about it. Some time later I heard rattling underneath while running, found both cats as the cause. Knowing that cats don't go bad by themselves I hooked up the scanner and found both banks @ 30+ fuel trims. No codes (supposed to set when in excess of 10+/-), I reset trims and allowed car to re-learn. Both trims o.k. afterward. Have to assume weak battery, exacerbated by cranking at low voltage, wigged-out the ECM and created the condition. Once the trims were re-learned no other problems have surfaced.

Excessive fueling or oil burning (too many hydrocarbons) causes the exhaust to overheat, resulting in either the catalytic substrate melting and fusing into a impenetrable blob or the shell expanding and substrate coming loose and rattling around until it breaks up and clogs downstream exhaust.

Degradation of the coatings inside a cat' can render them ineffectual and set a code but that does not cause them to melt/fuse/rattle/disintegrate.

 

Thanks Beav for your very informative reply.I will get the fuel trims read.
Sometimes I did get a rattle from underneath in the cold weather going over bumps I thought it was the sway bar may have been the Cats.

Thanks again Al