i have a 87 non turbo, and when i hit like 2500 in 4th and 5 th gear it vibrates really bad throughtout the car.. i think its a bad trans mount, but i also think it maybe clogged injectors? cause it started after i ran my tank down to just about empty, so i was worried i got dirt in them or soemthing, but its kinda annoying. so anyone got any ideas. it kinda sounds like my motor is really loud, intake wise, so i dont know what it is, but it just started out of no where

 

I really doubt it's the injectors.
Tire balance, u joint?

 

Take the car up to vibration and push in on clutch to see if vibration continues. If it were indeed the injectors, you would surely notice it in 1st/2nd at high rpms.
Last time fuel filter, plugs etc were changed?
As above, mounts, u joints a very good possibility.

 

if i push it to like 4500 or 5k in first and second i feel some vibration. the plugs are about a month old, not sure on the fuel filter, its not tire balance, cause if i let off the gas it stops until i hit the gas somemore
I get alot of blue smoke when i start the car up also after about 30 seconds .

 

It definately sounds like an imbalance somewhere. I doubt it would be something electrically wrong.

 

it could be the driveshaft, maybe the u-joint is broken and when it spins it will vibrate the entire car.