For mechanics that work on Honda's, I need help figuring out what's wrong with my car?

Me and my dad recently bought a new engine for my 03' Accord and we installed the new engine and the car starts up but after a couple minutes of letting it run the engine will start revving and we can't figure out why. Also the shifter is showing the cars transmission is stuck in drive and has a flashing green light. Any automotive mechanics or technicians know why this is happening and how can I fix it.

2003 Honda Accord ex problems. Need

Me and my dad recently bought a new engine for my 03' Accord and we installed the new engine and the car starts up but after a couple minutes of letting it run the engine will start revving and we can't figure out why. Any automotive mechanics or technicians know why this is happening and how can I fix it.

A Junk yard is offering me $310 for my old car?

I have a 1999 Honda Accord and i just got an expensive repair come up so i decided to sell it to a junk yard and they are paying me $310 based on the condition of the car.Is that too little?

My 98 Honda accord won't do anything when clutch is in?

Bought new switch behind clutch has a black button that goes in and did nothing took it out pushed with hand starts up tried old one and is good. It hangs down by clutch I have to reach down to start with hand is clutch bad and need replacing?