I have an 85 280SE grey market that was given to me. i replaced the fuel pump, checked the relays, found and fixed all the vacuum leaks...I also adjusted the idle down to what my ear says sounds normal. It starts fine and runs ok but My question is...When in gear, it lacks power. I have only driven it around the parking lot on my complex. it doesn't die on me but i don't trust it to take it to the corner gas station. A friend mentioned i neededto hook it up to an exhaust gas analyzer to tune the mixture. Will this help the problem i mentioned? Could use a little assisstance here. thanks in advance!