160 horsepower or 60?

[prevost3000]

I have a problem with my 1989 190E 2.6 Gas/Auto.

I've got no power in the engine. Its the straight 6, I had the engine dropped in there from an 80K salvage car. I really havent driven it that much since the engine R&R. Its got NO POWER. Even if you slam the pedal, it downshifts, and then just picks up like a 3 cylinder hundai in a Cadillac.

I've got new plugs H9DC, and NEW wix fuel filter, Premium 91 Octane Gasoline, 180-190 PSI compression, Sissy Fuel System (CIS-E) New OVP Relay with 2-10 amp fuses, new Air Filter.

I read the O2 sensor a few days ago and it was pulsing normally. .2-.8.

I need some hints that I can look after to get this problem resolved.

Any takers?