running Ok at Idle, If I push all the way down on accelerator it hesitates and sputters will just barely get 3800 RPM. If I gradually push down it will go into redline. At wits end had a shop run the Analyser on it they say readings are Ok E.G.A. ,
Scope says that ignition is almost perfect. slightly high on O2 but may be due to a cracked exhaust manifold. and a few small holes in muffler. Did not check the Fuel pump as it it new. ANY ONE Help!!!!