I have a 93 eldorado touring coupe with the 4.6 liter northstar and recently had a friend install a new starter for me. Unfortunately, since he put it back together, my car has been idling excessively high, and I was wondering if this is because of the seal on the throttle body. I read in the maintenance manual that this must be replaced after taking the throttle body off due to the fact that it will swell and won't seal correctly. I was wondering if anybody knows if there is anything that we could have missed in putting the engine back together that would make it idle high or if it is just the o-ring needing to be replaced. Also if anyone knows where I could order a replacement o ring online it would be great because as of right now I am looking at having to buy one from a dealership.