heres what i got 305 TPI 5 speed with 3.42 rear end.
jus replaced the trans mount

well i went racing and i dumped the clutch and the enigne jus bogged down and the car jumped alot very bad.. could i have broken an engine mount i tourge braked it and the eninge did not move or could the injectors be clogged or dirty jus ran some injector cleaner thru it also.. and we jus tried to fix the timing and it still idles at 1200 and jumps around alot which points to the fuel injectors as i see it i jus need some feedback. if you need to know ne thing else jus let me know

 

i got a 91 5 speed rs and it has the same symptoms.

 

Other than launching...how does it run? Does it have smooth acceleration, does it idle smoothly? Is the check engine light on? If not, your sensors are "most likely" okay, and signs would point to something in the fuel delivery system (injectors, regulator, etc.). A broken engine mount would not cause this.

 

in my car, the idle is not smooth but driving it is fine. i have no check engine light on.

 

well today we checked for vacum leaks and found a couple. and also i blew my bottom radiator hose and found that there was a rip in it possibly causing it to loose pressure but all is fixed now and seems to be running a hell of alot beter and we also replaced the fuel filter but it idles pretty high around 1200 and also when i turn on the ac it takes alot of power away from the engine could it be my compressor is starting to show its age... well with the way it ran today after we fixed all we could i was peelin em pretty good but i still have a monor vacum leak somewhere and i need to get the rear diff serviced any more advice would be apriciated and thanx to all who replide

 

and it runs very smooth at high rpm