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93 F150 5.0 Engine Changed now ck eng light

Hi, hope someone can help. I've got a 93 F150 4x4 with the 5.0 fuel injected automatic. I blew the engine about 3 weeks ago and had it replaced with a remanufactured engine. It runs pretty good however when I get to 15-20 mph, the check engine light comes on and stays on. It never happens at idel or reving the engine to any tach...only when the vehicle get to 15-20. Any ideas?

It is an EEC IV system I think, I was woundering if the module needed reprogramed after the engine change? All the vac lines seem to be intact.

Thanks,
JD

Went by the Ford dealer and they pulled the code...332 which is no EGR flow. There are two possible causes, the module on the EGR valve or the valve on the manifold at the back of the engine that connects to the heads. Any suggestion as to how to determine which is bad?

Thanks,
JD

Two cracked/broken EGR Vacuum lines inside the protective bundles. Repair them and she's running like a champ.