I've been working on my car alot lately, and when i tried to adjust the timing it didn't work afterwards- i didn't even do nethin to it- i just disconnected the battery, and then decided i wasn't gonna do it-now it won't start, i did reconect the battery, and it won't start, i swapped the coil,cap, and rotor, and it fired rite up-then later on that nite, it wouldn't-this morning i got it to run, then shut it off, and it does the same thing-wht could this b