In the process of fixing me heater core I took out my fuel injection unit and in the process removed all vacuum lines to it. After attaching all lines as they were my car is idling very weird. It idles at about 1200-1300rpm and actually switched between gears rather violently. I've also noticed that when I put the car into drive or reverse it takes off rather quickly without my foot on the gas. ANYONE HAVE ANY SUGGESTIONS? THANKS ALOT GUYS!!!!!

 

check your vac lines again make sure they are right. the wrong vac hook ups will make the car idle high and take off with no throttle input

 

Depending on what year accord you've got, you should find the vacuum hose schematic on either the hood (bonnet for our British friends) underside or on the fuse box cover.
I'd recheck your hose routing. I would also check for a hung up or improperly installed throttle cable.
You did say you took it off, right?

P