4.6 swap issue

[Gannon]

Just finished swapping a blown 4.6 with a used one with 89k. Before the car was parked, the auto transmission shifted smoothly, never an issue. on the first test drive the car doesn’t want to go above 30mph. Fluid levels are where they should be, there is no check engine light. The only other thing I can think of is maybe a vacuum problem? Idk. The driver side valve cover vacuum connection is broken. Could this cause the car to limit its power. Any insight or recommendations are appreciated.

 

[07GtS197]

Make sure all your fuses are good and all the transmission electrical harnesses are snug. It sounds like it might be stuck in first gear maybe.