not a 1990 its a 1989 on 1990 Oldsmobile Cutlass Supreme

iHAVE POPPING OUT THE AIR INTAKE AND NO POWER ON A FLAT SERFACE GOES GOOD BUT UNDER A LOAD ON A HILL 26 MPH TOPS ??????

by in Wasilla, AK on August 27, 2009
1 answer 3 comments
ANSWER by , August 27, 2009
Sounds like your Catalytic Converter may have gone bad, which can be problem on this vintage GM cars. They fail and plug up. Have a shop do a back pressure check. that will answer this question. Best of Luck!
COMMENT by , August 28, 2009
thanks dandd
COMMENT by , April 27, 2010
crossed wires and o2 sencer just had this problem popping out the throddel body
COMMENT by , March 30, 2011
our 1990 Cutlass acted the same way. It needed a new catalytic converter.