So I posted this issue about a year ago and still have yet to figure it out, so what I have goin on is my 98 civic lx hiccups while driving only after it has warmed up and while doing so the main relay clicks and the check engine light goes out and than back on quickly and car runs normal again, I had a gsr swap in there that ran with no issues and after doing the swap to the b16 it started given me this issue and I cant seem to figure it out to save my life nor anybody else I have explained this problem to.... the engine is mechanically fine so i know its a 100% an electrical issue problem is tryin to figure out whats causing the issue, Ive checked and cleaned grounds and added grounds just to rule out a grounding issue, I ve changed the ecu, the distributor, the main harness, the iac valve, disconnected the alarm, tried just about everything I can think of and still nothin so anybody with any good advice would be greatly appreciated cuz this issue is driving me F@#$&%@ NUTS

 

Describe “hiccups”?

 

Ok so when it does it basicaly the main relay clicks once and the cel on the dash goes out and its like it loses gas and spark for a quick second and then returns to normal and cel pops back on.... and by the way its throwin a cel for the o2 sensor which i know is good

 

Sounds like electrical. Losing power brieftly then resume. Check all your wires and ground. Check the main relay for cracks.

 

Check grounds and added grounds so that is 100% not the problem, it was runnin fine til after i swapped the current engine in it and on top of that i put another new harness and tried a known good main relay and same ****

 

Could be the ignition switch dropping out. Or the ECU itself.

Start it up and bang on the igniton switch, fuse boxes, ECU, etc.

 

Swapped the ecu out with a known good one as well and same thing and i switched put the ignition and still the same thing, i shoulda put a full list but was in a bit if a hurry to write the post so i l put a list of what i have changed
-alternator
-ignition switch
-main relay
-ecu
-main engine harness
-dizzy
- checked grounds about 100x lol and added grounds just be 110% sure
-iac valve
-map sensor
-tps sensor
-cooling fan sensor
-dissconnected radio and alarm to see if they may have been causing it
I think thats about it so i dont know wtf is going on I ve had a few people check it out to have a different set of eyes on it and nobody seems to have the slightest idea about what could be the problem, even had this issue posted here on honda tech in my other account n still nothin so i dont know what to do