I moved my 96 E320 with 159k miles into the garage, the next day I started it and it ran like a turd for about 45 secs and then smoothed out. Well not wanting to get stuck on the side of the road I replaced the MAF. Jump forward 2 weeks and my CEL is coming on: I pulled the code..P0170 (fuel bank) I replaced the plugs today, cleared the code and drove about 15 miles...CEL on again. I'm at loss.. do I replace the crankshaft position senor or fuel pressure regulator or O2 senor (which one) or the MAF again