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midlifecrisis · 02-05-2008

The engine warning light came on today. Took it to a garage with a diagnostic machine and it came back with the following codes:-

PO300
PO301
PO302
PO303

In other words the rear bank is misfiring. The car drives great its just the idle is lumpy. You can feel the judder at idle. On the move the car is smooth as silk and revs to the redline with no fuss. My car has done 53000 miles and has been very well cared for.

Car had major service at 41000 miles which included cambelt, sparkplugs and waterpump. Previous owner also had light come on and had three new coils fitted to the rear bank. The car has also had a new Airflow meter fitted last month.

So there we have it. Spark plugs, MAF and coils have been done, so whats causing my 166 to misfire on the rear bank?

Any suggestions/advice would be greatly appreciated.

02-05-2008	#1 (Post Link)
midlifecrisis Club Member Club Member Number: 410 Join Date: Aug 2007 Location: S.Wales Posts: 590 Member car: 147 Turismo, 166 Lusso	166 Engine misfire. The engine warning light came on today. Took it to a garage with a diagnostic machine and it came back with the following codes:- PO300 PO301 PO302 PO303 In other words the rear bank is misfiring. The car drives great its just the idle is lumpy. You can feel the judder at idle. On the move the car is smooth as silk and revs to the redline with no fuss. My car has done 53000 miles and has been very well cared for. Car had major service at 41000 miles which included cambelt, sparkplugs and waterpump. Previous owner also had light come on and had three new coils fitted to the rear bank. The car has also had a new Airflow meter fitted last month. So there we have it. Spark plugs, MAF and coils have been done, so whats causing my 166 to misfire on the rear bank? Any suggestions/advice would be greatly appreciated.