88turdbucket

so heres what has happened,it sounds like fuel knock and it only does it while going through the gears. ive gone up to 91 or 93 whatever the highest is, and there wasnt a significant amount of change, so i dropped back down to 87 and added amsoil PI injection cleaner and nothing sounds horrible. ive changed out the filter and pump not chasing this problem but in routine. so if its not fuel knock them im leaning towards valve chatter, now ive replaced the distributor and timing belt and everything else there, i didnt notice the noise before i did all of this, it was after, so i have checked the clearances and all of the intake valves are set at 8 and the exhausts are set at 10 which is well within clearances, this is a 97 civic ex d16y8 manual transmission no mods, this is my daily and would like to fix it so i dont hear this noise while driving. thanks for any help..

Former User

Did you use a timing gun to adjust the ignition timing to spec? See FAQs sticky for diagram.

88turdbucket

yes i set it to 12 degrees, thats what the manual and the sticker under the hood said.
im going to recheck this weekend, i have a pushout tractor to rebuild this week and thats when ill have time. im just trying to look for other options.

Former User

Another possibility is carbon build up inside the cylinders causing detonation. You might want to try a Seafoam treatment.

88turdbucket

i think ill try that also. i did it one other time when i was having all the other problems but i havent done it since i got everything else lined up. thanks