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I have a problem with exaust fumes

(1996 Volvo 960)
in Clinton, IA on March 17, 2013
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?
Displaying 2 answers & 2 comments
Popular Answer
on March 17, 2013
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.
on March 25, 2013
I've tried most of what you said but still that's not it. thanks
on March 17, 2013
you may need o2 sensors is check engine light on
on March 25, 2013
no the check engine light is off and I can't find o2 sensor on my car . where is it't location?
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