I have a 95 Cavalier I recently purchased. One problem I've noticed now that I have the chance to drive is that it starts up fine but seems to be fairly rough for about 5-10second before it comes up to what sounds a normal idle. although while driving it at stops I notice that is has a few "shakes" nothing like when you start the car but if you pay attention .. noticable.
One other thing I've noticed is that when after you start the car it also makes a mechanical clunk when you return the key to the normal position after starting the engine (almost sounds like something mechanical that re-positions when you turn the key). I don't think its the fuel pump makes a normal buzzing noise when your make the first turn of the key.
Any ideas if there is anything I can do before I take it to my mechanic?
I was thinking of changing the fuel filter and checking the spark plugs.... I've thrown some of the expensive injector cleaner from the GM dealer to see if that helps at all as well