2003 Honda Accord Q&A

2003 Honda Accord Question: Codes showed misfire in several cylinders after replacing plugs and coil packs s

Still running rough cleand erg cencor now what should be cheched -
Answer 1
4 or 6 cyl.? Auto or manual? -
Comment 1
6 it's a 3.0 misfire in 5 it's new. Random miss in 2 4 6 all new too have also cleaned the erg censor auto -
Comment 2
Hopefully you're using a scanner? Unplug EGR (electrical) and see if any change in misfire. Could be faulty valve. -
Answer 2
rec. fuel system clean. ethanol treatment to 1 tank premium. ethanol blend in fuel causes build up in fuel system(possibly fouling injectors), combustion chambers, exhaust system and causes increased wear to spark plugs. fouled injectors can cause a misfire. injectors need to spray mist to fire properly. fouled injectors lose spray and tend to squirt(firing inconsistently: misfire). result will take drive time. hope this helps. -
Comment 1
Have unplugged erg and cleaned it Well also have put in the regular gas, gas mileage is very poor right now. Scanner shows the hard misfire in 5 and slight in 2,4,6 -
Comment 2
Is this a true scanner with live data or a code reader? -
Comment 3
I believe a code reader -
Comment 4
Live data would be more helpful , with a case like this. Might want to have a shop scan it while it's running , to see what's going on. -