Hope someone might be able to help. Whenever my 2000 S320 is put under load either by depessing the accellerator hard or by pressing it further into kickdown the engine misfires and goes into limp mode. Everthing resets again when the ignition is turned off then on. I am getting fault codes 300 to 304. So far I have replaced the MAF, the oxygen Sensor for Bank 1 and the fuel filter with no discernable effect. Can anyone advise me on the potential source of the problem and the possible solution. Many thanks, Mark

 

is there maybe clogged catalyst..when your on it hard the exhaust is getting backed up. your car is common with cats going bad but you usually hear them rattling very noticable. so if your not getting any rattling then maybe thts not the problem. seems to me like a fuel pump maybe? they can give you the same sysmptoms as you described sometimes. you can loosen the cats from the manifold and drive it to see if under hard accel your problem goes away. or you can unscrew your O2 sensors from the exhaust instead of loosening the exhaust. this will help you with finding out if youve got clogged exhaust somplace. i was thinking though most of the things i descibed...shouldnt put the car into limp mode. you should still be able to drive with out restarting the car.