Intermountain railway es44ac

Recently purchased the es44ac Canadian Pacific 49703DC. Runs way too slow. Have to have my powerpack up to full throttle and the thing just crawls. Any suggestions for rewiring to correct problem?

Any help is greatly appreciated. Richard

A few questions

What scale is it?

Who makes the loco? Also does it say DCC installed or equipped?

Does it have sound installed?

What power pack are you using?