My parking space puts 1 wheel 8-15 inches above the other. the 1st time l start the car for the day, it makes a noise like the muffler is going to fall off. all starts after that are normal.
When my car is parked on a flat (normal) parking spot, it does not make any noise when l start it.... the way it should be.
l took it to a mechanic, everything checked out fine, although before l took it to him, l did not know about the tilted verses flat parking thing. His parking was flat, so he did not hear anything.
I've had this parking spot for years, never heard the noise till about a month ago.
Anyway, what do u think l should do to get my car normal again...... and pls. do not say ''get a flat parking spot'' Thank You Very Much. , Joe
l guess l could have a mechanic park it tilted overnight, then start it the next day and hear it for himself........ guess i'd have to find a 8-15 inch ramp for one of the front wheels...... anyway, thanks again,Joe. even when l back the car in, the same noise happens.peace

l know what is your problem. when you park on the tilted area your engine is tilted and thus your exhaust is also extended. your exhaust is only to extend a certain amount a 8-10 inch ramp is pretty big.