1993 Buick Riviera bogs/ won't accelerate?

[bw88350]

when in park it idles fine, but blip the throttle and it's like it's flooding, in gear, if you accelerate extremely slowly it will go, but any more than 1/4 throttle, and it just bogs and then starts to hesitate and surge. New fuel filter, throtle position switch, plugs. just can't figure it out. Looked at the exhaust system, and the pressure out the tail pipe seems ok. What would be causing this? injectors? sensors? etc? thanks a bunch

 

[Cory]

check air cleaner, sometimes animals build a nest. Does your chek engine light come on?

 

[Cory]

check air cleaner, sometimes animals build a nest. Does your chek engine light come on?

 

[Johnny C]

Try replacing the oxygen sensor.The symptoms seem to point towards that.A 93 should only have one O2 sensor.Good luck.