My 95 tahoe has a bit of a stumble/miss at the top of the gas pedal, when I get past the top of the pedal it seems to be fine. I have replaced the plugs wires cap rotor air and fuel filter pcv valve and the tps. It seems a little better but still has that. Also when it idles sometimes it has a bit of a missfire/ stumble. I also checked the egr valve and it holds but the travel upward is not very smooth. Could it be the egr even though it holds in place?