Originally posted by bdavies:
I ran the OBD-2 software and I had a P1518 code. That is the IMRC (Intake Manifold Runner Control) module cable had broken so the secondary ports were stuck open. Unfortunately, the part from Ford was about $150. I would check if Motorcraft makes the part,
Secondaries are spring loaded to close automatically! Can't get stuck open because the cable breaks.

$150 is way too much from the dealer. Shop around or just call Bill Jenkins. Should be around $100.
Motorcraft = Ford! No aftermarket IMRC...