1996 Volvo 960 Q&A

1996 Volvo 960 Question: I have a problem with exaust fumes

my volvo 6silinders after warmup it gets slugeged and smelly with unburnet exaust fumes, Ireplaced two bad ignitors but the problem remains with a little un known vibrant with the engine? -
Answer 1
you may need o2 sensors is check engine light on -
Comment 1
no the check engine light is off and I can't find o2 sensor on my car . where is it't location? -
Answer 2
change all spark plugs to premium plugs, upgrade ignition cables or coils to performance type(accel's), upgrade air intake to high air flow type(K&N). TREAT FUEL SYSTEM with stab-bil ethanol cleaner. your cats do not control exhaust burn but act as a filter. use high grade oil. your engine is not burning efficiently. -
Comment 1
I've tried most of what you said but still that's not it. thanks -