Recently bought a 1992 Sentra SE-R and wanted to ask if anyone has any ideal about a rumbling noise/vibration I am getting. The car has over 200K on it but I recently had the valve cover off and it is pretty clean internally. No smoke, pulls hard still and most everything still works: Cruise, A/C, Sunroof, trans does not pop out of 5th, etc. But I get a rumbling vibration under the floor beneath the driver when accelerating through the 1500 - 3000 RPM range. As if something is loose hitting the floorboard. I checked the exhaust and it is not the problem. I did notice the boot on the driver's side of the rack and pinion is ruptured but did not think that would be the problem. Before I took it to a mechanic, I would like to have some ideal what it could be so that if he suggests a fix, I will know that makes sense. Any suggestions as to what I could check would be appreciated. I am mechanically inclined but did not want to "Easter Egg" fixes. Also if there is anywhere (online maybe) I can get door hinges for less than the $50 the local dealer is asking that info would be appreciated also.
Mike G.