Had the catalytic converter checked out and it was fine! Was told it was relatively new. The exhaust pressures were excelent. The transmission also checked out OK! So it looks like we are back under the hood. By the the fuel filter and fuel pump are also good. Would bad fuel pump relay cause the lack of power.

None of the local autoparts stores can connect to the computer to read any codes. Any idea on what to read the computer codes with on a 1991 560 SEL? Thanks again