my friend has a 94 celica gt and whenever she drove it the idle would make the motor shake like crazy. then a few days later it would just shake whenever the car was on. so yesterday i went over and looked at it, her spark plugs were REALLY LOOSE. so i tightened them down and sprayed some throttle body cleaner in and checked her fuel filter and air filter. it ran great all day yesterday and today she called me and said its doin it again. does anyone have any idea?

 

When was the last time the motor mounts were replaced?

 

about a month or two ago along with the fuel filter, exhaust manifold and exhaust back to stock. i just got done lookin at and could it be the fuel pressure regulator?

 

Bad wire? or Bad plug. Check each cylinder and see it pulling one makes it run worse or no change. If there is no change that is the dead cylinder or cylinders

 

i checked all the plugs but it still ran like crap. yesterday i adjusted the timing and seems fine but i dont know where to adjust the idle on this car

 

def sounds like its mis-firing... start the motor and let it run at idle, and one by one pull the spark plug wires. if nothing happens that means that spark plug is not working, but if you pull it and it runs worse, then that cylinder is fine...
which motor is in it?

btw sorry if i worded something wrong... im kinda drunk lol!

 

lol no everythings fine lol
and its a 94 celica gt with the 2.2 in it. but if it was the spark plug wouldnt u be able to tell by loookin at it? because i pulled them out and they looked ok, not the greatest but they looked ok