I have a bad camshaft sensor in my old distributor on my 99 nissan frontier so I replaced it with a new one. With the old distributor I was able to get it to the right specks at 15 BTDC but with the new one I can't get it any more advanced than 18-20 degrees. This is causing poor gas millage and performance. I know for a past im not off by a tooth because I've pulled it out and put it back in several times. Is it possible I have another issue causing this or do I need to just get different distributor. I could also just drill out the extra room I need on the mounting bracket but that seems like a crude solution.