I'm new in this forum. Would appreciate ideas on what might be wrong with the exhaust system on my 2000 Jaguar, S-Type, 4.0L V8, AT. Just had the transmission replaced (rebuild). Shop noted that I was getting no exhaust out of the passenger side (U.S. ver.) exhaust pipe. I have a code reader. Getting code indicating a slow 02 Sensor. Engine runs reasonably well. I'm at 105K miles. Any ideas on problem and/or fix???

Thanks

Dick in Bothell, WA

 

I suspect that one of your catalytic converters is clogged.

Check if any non factory exhaust work has been done, this could also play a role in the problem if not done with quality components.

You should see a code if it is clogged and if there is a code do not drive it since a host of problems can be caused by a clogged cat.

 

+1, but you may not get codes in some cases - but looking at engine data such as injector pulse widths would be revealing. (Not DIY for most members. You might figure another way to diagnose this but right now nothing occurs to me.)

 

My xj6 is doing the same thing it makes ur car run really poorly, and air goes into the motor, and causes the coolant to leak out of the rear somewhere, Im working on it right now, ill tell you what i find, the cat does not seem to be clogged, as i drilled it last year, and the guys are right a code would pop up, always it just will ox gen sensor. BUT there is some BS attached in-between the the muffler and the cat, that's what im putting my money money on, because it starts off as 2 pipes then goes to a center one pipe then back out to 2 and i suspect poopola in there somewhere, but your car should not want to drive or shift very well when that happens and it will stall all the time if your wife drives it but wont do it to you when you drive it for some reason, lol ahaha i love this forum!

 

My guess is your right side cat is melted. Can you hear a small exhaust leak? I prolonged exhaust leak could speed up a melted cat issue. If your cat is melted you mite also end up with a bad 02.

 

+2 - Clogged Cat Converter - I agree with the other comments - DO NOT drive until you get it checked out - just curious - the transmission shop had to disconnect the entire exhaust from the manifolds to the mufflers to pull your transmission out - they didn't notice anything? You can peek right into the cat converters from the front. Another potential area - your resonators... Good Luck and keep us apprised of your findings.