When I purchased my SRT I sent my RCM to D.J. Tighe and purchased a new one. This is what he found: "Received. Refurbished. Returned.
Poor solder joints. Burnt air pump relay contacts. Applied the Me So Horny mod." And my car was running fine. After reading all the posts on this site on things that are weak links I also replaced the Crankcase position sensor, did the sticky key, changed the steering stabilizer, trans fluid, and other items.