If you're still getting the code 6 thats what it is. I had it too. Really hard to start and when its started for the first 3-4 minutes its sluggish. I'd say let it warm up to operating temp until and then drive it. Don't sit there flooring it trying to get it to go, because thats not good. As Schmoo said, the ect sensor will mess with your ignition and fuel, so get the ect problem fixed and it will work fine.