That's 16.2kg/hr which is pretty ideal at idle according to Vida. I appreciate the response, and if the data that I pulled from my Autel is in a proper operating zone, I have to assume that it's correct and actually pointing to the cat failing, right? If I'm not missing anything, then I have a dire...

abscate wrote: ↑12 Mar 2020, 15:53 Fuel trims are fine.

What is the MAF reading in grams per sec?

.01 lb/s-

or 4.5 g/s at 750 rpm

Hard to speak about melted cat, there is quite a drop in temp indeed. If you drove with a severe misfire, the unburnt gas could damage the cat, and may trigger a Cel intermittently. Your 2004 may also be worth a look at the CEM for any traces of water leak Thank you for your reply, sounds like you ...

I have a 2004 V70 with 155,000 miles on it. It regularly gets 28-30 mpg, hwy, and has been very reliable. This is the "good one". Our other Volvo is a 1999 V70 XC with all the usual problems, currently not running and will be a restore project later. Now for the problem, Approximately 1 mo...