Hey guys I have an 87 Camaro Iroc z-28 with a 305 TPI, I have recently replaced the 02 sensor, the egr valve, plugs wires rotor an distributor cap and vacuum hoses.. Seems when I first start it up it wants to cut out and die so I hold the gas down until it warms up enough to idle on its own. I put the car in gear RPM's drop to 750. When in park i try to stomp on the gas and it hesitates and cuts out. When i am driving it really seems to bog down and doesn't have any power. Is this a timing issue? If you guys could point me in the right direction I would appreciate it
thanks
John

 

Vacuum leak, sounds like. Go back over everything. Everywhere there's a vacuum connection, spray it with carb cleaner with the motor running.