have a 87 rx-7 GXL N/A rough idle all the time not when driving when i pull up to a stop light or when I start it up same problem cant get rid the mis. checked for vacume leaks cant find any engine was put in about 2 months ago the car runs great other then it almost feels like a mis. when i come to stop

 

does any body knnow the problem to my car

 

need a tune up or a new fuel filter...

let me know I sell tune up kits for 135.00 shipped

see whats included here

https://www.rx7club.com/showthread.php?t=612008

 

thanks but i have new NGK plugs and wires. fuel filter havent yet changed but will i think its some thing other then a tune up but thanks for answering