Hi, My '93 is misfiring horribly, codes are 34 continuous and 12, 34 KOER. Haynes manual suggests EPT sensor, EGR, EVP, and possible PFE (Pressure Feedback Electronic??? don't have a clue about this one...) . The EVP Haynes sensor test fails ( has @ 2.00V instead of less than 0.67V when it's...