Horrible missfire

[Briefx]

I have a stock b18a1 in my crx with a obd1 s300 ecu. I was having a problem with my ecu where the green light next to the chip wouldn’t light up and wouldn’t run but I reloaded my tune and it seemed to fix that problem. I’m not having a problem where it revs fine below 4.3k rpm but when it gets past that it like cuts up or misfires and my tach needle jumps all over the place.

[Spunkster]

Are you using resistor or non-resistor type spark plugs?

[Briefx]

I’m not sure. It ran fine before I let the car sit for Probaly 2 months. I noticed today as it starts breaking up and misfiring that the cel will come on and in smanager it’ll say 13 new cel for about a second then it goes away

[Spunkster]

You need to check the spark plugs.

[Briefx]

Yeah so i found out their the autolite iridum xp's i believe those are resitor spark pluigs

[Briefx]

https://youtube.com/shorts/LtF0pJ__Xj0?feature=share Heres a link of it doing it. sometimes whenever its missfiring like that itll clear my tune? and ill have to open and close smanager and reload the tune to fix it

[Spunkster]

Post the calibration and a datalog showing the issue.