156 v6 Flat spot - help please
I have owned a 156 v6 sportwagon since new in 2000, loads of grief in the early days with misfires eventually tracked down to coils by dealer. Then 4 years problem free, I had cambelt changed at 56,000 and no issues until recently. I notice a flat spot at 4000 rpm when accelerating fairly hard, then a week ago the engine warning light came on. A local garage diagnosed Oxygen sensor fault and has replaced both sensors - I have just had the car out for first time and no warning lights but flat spot is still there intermittantly. Any ideas would be greatly appreciated.