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A few days ago i filled up my gas tank and it smelt really foul. I thought the gas was really bad. The next day the car began to shake vigorously when accelerating and in idle, and it also stalls when it first accelerates. Then my check engine light came on so i got a scan done and it said i had a cylnder one misfire. I did some research and found that it could be the spark plugs. I went to the auto store and bought new ones. My dad, who is kind of experienced with cars, installed them. The problem did not go away so i took it into break masters to have it looked at. They did multiple tests, put new spark plugs in (because the person in the auto store gave me the wrong type), new spark plug wires, new ignition coils, new distibutor cap, new rotor, and a new fuel injector for cylinder one. The tests they did included testing for vacuum leaks, and a compression test, as well as varrious other tests to find out what was wrong. Finally they did a fuel injection cleaning. At first the engine light went off but the shaking still continued. Break masters said it was safe to drive. However a few hours later the check engine light was back on. I did another scan and it still read a cylinder one misfire. So i took it back to break masters and they ran another test on a sensor. They told me that i needed a new distributor and cam seal because the cam seal was broken and leaking oil into the distibutor, causing a fake reading of cylinder one misfire. So then i bought a new distributor and cam seal from the auto store. The people at break masters told me it would be easy enough to change myself, so i tried. However i did not have the right tools to reach the cam seal in the valve cover. I put on the new distributor anyways in hopes that it would fix some of the problem. When i was finished the check engine light was still on. I took it for a test run, and the car could barely make it past 35 mph and it took a lot of RPM to even get there.the car still shakes, acceleration is still hesitant, and now when ever driving you can smell burning, im not sure what the cause is. I am out of ideas, and have spent far too much money to not figure out what is wrong. Does anyone have any ideas? By the way my car is a Nissan 200sx year 1995 Thanks so much.  

did you call the gas station and complain that since you filled up your car won't run... and see what they say..

once in a while.. a tanker full of fuel .. will be totally wrong.. will cause nightmares for drivers all over the area..

one car that was towed into the shop i used to work at .. was perfect.. except it would NOT run..  when we took a fuel sample.. poured out a Teaspoon of gas into a stainless parts tray in the middle of the parking lot.. and lit it with a propane torch..  it would just barely burn..    we did the same with a fresh sample from a different car..  big flames...

drained the gas.. blew the lines out..  put in 5 gallons of fresh gas...  ran great...

another shop.. a fellow dropped his car off.. after buying gas.. his car started smoking..  by the time i was called.. they had done 2 valve jobs and changed the fuel injectors..  along with a bunch of other fuel injection devices..

i disconnected the fuel lines at the fuel rail.. hooked up the injector cleaning machine.. poured fresh gas in the machine.. when i ran it on a clean fuel supply.. it was perfect after a few minutes of making zero visibility smoke... smoke so dense.. traffic behind the car would come to a stop... and creep through.. brought a six lane main street in la to a STOP..

i told them to drop the tank.. drain it.. put it back..  put fresh gas in.. and try it..

the next day.   they were on the phone again..  same problem..

when i got there .. i ask the tech what he did.. he replied that he had done exactly as i had told him..   i ask where the old fuel is...  his answer.. we got rid of it..  i ask where.. did you pour it in another car.. down the drain??? where is it..  i stood on his toes and bent him kinda backward over the fender.. he admitted . the fuel looked clean so they put it back in the car..   DOH!!!!,  at that point the car owner walked up.. i realized its the shop owners cousin..  i ask him about what he was doing just before the car started smoking..   he replied that he had bought 5 bucks of gas..  .. about 2 and a half gallons at that time.. how much was in the tank.. he said.. less than 1/8...

what else did you put in..     nothing was his first answer..  i moved in for the step on toes .. NOTHING??? well a fuel injector cleaner..   i started leaning in.. bending him backward.. he admitted to 5 bottles..  into about 5 gallons of gas..