had a missfire on cyc 3 so i changed plugs wires air filter upstreem 02 senser

Remove the pre cat o2 sensors and start it to see if it changes the misfire issue.

ok thanks i will try that and it dont do it all the time comes and goes so..... could it be a fuel pump and filter problem do u think had 2 auto tech tell me them rearly go bad ???

The pumps go bad when they go bad, the filters restrict sooner then you think, change filters all the time to save the pumps. Anything can happen anytime. Just wonder about it getting worse after plugs and wires changed.

the filter is on my pump thats 300 also have to pull tank

Can you do a fuel pressure test, and volume test, and still the question remains, Why is it worse after changing the plugs and wires, if fuel was the main issue, why did it change.