What is your question?
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What is your question?
engine light came on and it started losing compression on the hills it would only do 20 mph
What makes this problem better or worse?
at speeds of 35 to 45 mph
How long has your 1992 Oldsmobile Cutlass Ciera had this problem?
one week
Parts stores are unable to read the codes on pre 1996 OBD1 vehicles - like this one is .. A professional scan test will do much much more than just retrieve the codes. It is the only 'logical' way to proceed.