[olopezm]

Hello guys, My moms 2000 windstar with 84000 miles has started having problems, the mechanic has just rebuilt the transmission a week ago and I changed the oil, spark plugs and wires yesterday; my dad, my brother and I rebuilt the engine about 4.5 or 5 years ago because it overheated.

This morning the minivan was running fine, about 2 hours later of driving it, it wouldn't accelerate: the more you step on the gas the less it will accelerate. Since we were far from home we had to drive veeeeery slow... until we got home, during that time the CEL came on and I had it scanned the result is P0171 and P0174. I already read about the TSB regarding the intake manifold problem, my question is: Do these two codes necessarily mean I have to do the TSB? or can it be something else, like both oxygen sensors or a bad MAF?.

Thanks in advance for your help guys I really appreciate it.

EDIT:

The problem seems to be fixed by changing of the MAF sensor and the fuel pump, I would suggest to test the fuel pressure first just to make sure you don't waste money by buying both things, mine just dripped fuel when pressing the pin on the fuel test port instead of spraying it.