I have a t3/t4 b18c1, hondata...my problem is lack of power, when i advance my distributor my car runs better, although when i am cruising stable throttle input the car stumbles and bogs down. I can give it more throttle and it picks back up again. my timing at idle is right right at tdc. so i decided to advance my dizzy to about 12 (guessing) all the way to the firewall. well it stumbles and i have no clue. What are your thoughts. is it possible to be a fuel injector?

 

tune

 

the car ran great for about a month, it has been dyno tuned, after a day of racing the car started this lack of power issue.

 

Leakdown and compression test?

 

compression is good, havent done a leakdown test yet