[HiFlyer437]

Originally Posted by CNGBiFuel

Hadn't heard of that one. Had something similar in that, I think the two are related? Where the driver's door lock micro-switch fails to make contact. Means the central-locking and alarm no longer sets via the keyfob. Will cover that when I've a mo'.


Coil Packs on 1999 & 2000 cars
The last of the P80s had Denso ignition systems (it was also these that had the ETM issues covered earlier). The coil packs start to play-up at extended mileages. Car will run on four at low to mid throttle and run very lumpy.

Lift off the plastic spark-plug/coil cover. Engine running, in turn pull the plug off each coil-pack, doing this should make the engine run still worse. If it doesn't, you've found the kiddy. Replace this coil-pack. Messing with coils will likely throw a ignition fault code and put on your CEL. You'll need a code reader to reset. Scanguage is good, but there's cheaper.
These same coil-packs fit some later Volvos, hence Phase 2 S80 S60 V70 XC70, so cheap and plentiful.

Got mine via eblag, two used packs in my stash for £13 delivered, ready for the next one or two to fail. Suppose I shoudl buy new, but at that price I'll take my chances. To identify see piccy.

My 2000 20v (227k, no history, passed MoT last week!) has just started doing this. P0300/P0505 fault codes (plus a couple of others). Will give this a go before it gets dark!