That's because in the 2002 MY they switched the EVAP system from using a leak detection pump to the NVLD (Natural Vacuum Leak Detection). The FSM posted on this site makes reference to the different systems. So, while swapping motors might not be an issue, swapping pcm's might, since the newer ones would be programmed for the NVLD and the older ones for Leak Detection EVAP (I don't know the correct name for the system, sorry).Intrepid2001 said:Im fought a similar problem in a switch from 2.7 to 3.2. Some 2.7 have leak detection pumps and 3.2 may not. The vacuum connection is a T on the drivers side of the plastic intake. Its the third line. Fuel pressure, purge and leak detection. You may have an open line. Hope this helps.