I drove my 93 LeSabre in limp mode checked codes and the code No.22 TPS appeared

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Replace it . Installed plugs and wires still ran rough. Checked plugs spark discovered plug No.1 had a weak spark,replaced all 3coils while doing job must have created a spike in system cause my Tack nor my Batt. voltage gage work to add insult to injury my DLC is no longer functioning. All logical directions will be greatly appreciated. 3.8liter engine.limited model. Tenth digit in Vin is the letter P but it's registered as 1993 with L-series Eng. Sequential fuel injection