Seafoam it before you replace the o2 sensors.
Clean the TB. Remove it from the car, and clean it and all the EGR passages. The sticker that says not to do this is 22 year old, lol.
Look at the EGR tube. It's unobtainium, so DO Not break it.
It will be full of years of goo. Flush it out until you can blow air thru it with no resistance.
After you do all this, do a compression check, and see what the peak pressure is; add a spoonful of oil to each cylinder and repeat to see how bad your rings are.
Transmission: unless it's a manual, change the fluid, drive it and see if it helps or kills it.
These cars are getting old, much is worn out.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
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