when i start the car it needs to be held a bit to keep running, when i take off their is no power, hoever i have had her up over 90 a few times and it gets there if you ease into it, also funny gases coming up around exhaust manifold, not really funny but odd, like it is smoking around the manifold......could leaky injectors and plugged cat be the culprit??

need help wiht my newest project

CB

 

Check this out
http://www.mazspeed.com/atf.htm

 

i sprayed carb cleaner into the intake to resolve this, also when i do the choo-choo train test by removing plugs it sounds fine and does not make the "galloping sound" often heard by a blown seal, also why would there be seemingly lower exhaust levels and the heating of manifold and smoke from manifold area.....will try ATF trick anyways....more info gladly appreciated

 

help...?