1990 auto. purchased car 500$ gave it a little tlc and ironed out abs issue drove it to work a couple times about 60 miles . got in leaving work today and suddenly no power on acceleration almost couldnt get up a hill would not idle cranks fine but will not idle on its own.. limped towards the house 15 miles away .. managed to maintain a regular speed couldnt floor it .. until about 6 miles from home it wouldnt maintain a constant speed cutting out /loss of power at regular intervals the intervals were about 4 seconds apart and progressively got worst to an up and down cycle rolled into the drive way and died of course.. cranks right up and when i keep rpms up enough to stay running there is a constant surge effect up and down --up and down and will die when you let off gas.. also smells like it is burning gas fuel smell from exhaust after about two hours reading the boards im leaning towards crank sensor or hb as there is a significant wobble on the pully.car did sit for about four months could it be the fuel filter/pump clogged injector . and then theres the f. p. r. i cleaned iac motor no change. cats removed. i have another 90 was going to trouble shoot by switching out components where should i start dis? cam sensor i have a new crank sensor these symptoms come from about 6-7 things.. i guess my big ????????? is how much could a failing harmonic balancer/crank sensor have to do with these symtoms because thats where my gut is.. just feels like someone is turning fuel delivery off and on... im pretty confused. any ideas????????????/