Spyder constant and unrelenting missfires on my 96 eclipse

[Jaydiz]

there are two kinds im currently expirencing, firstly when i hold the throttle at the same position for a while at any speed it will start missfiring and wont stop until i let off the throttle conpletely for 5 seconds, secondly when i go past 3500 rpms my car will missfire and backfire. i have replaced plugs, wires, injectors, my ignition control module, fixed a boost leak, changed my distributors and tried a new throttle position sensor, this is really pissing me off if anyone has any ideas please share them with me

 

[evil_eagletalon]

Backfire usually is a sign of a timing issue. Verify mechanical timing.

 

[Jaydiz]

i mean i get that but when im missfiring im going to have extra fuel in my exhaust so i have a feeling it involves that, is there any way for me to check my timing at home