Other codes are P0301, P0302 and P0304. Anyone had this problem?

 

https://letmegooglethat.com/?q=rando...Aacurazine.com

 

Had 3 other cop and put each of them in nr 4 and didn't fix. Put new spark plug in nr 4 and no fix. Other cylinders when disconnect wire to cop engine revolution would drop. Only at nr 4 stay same. Brought stethoscope and seem that at nr 4 and nr 1 fuel injectors are firing. Heard clear clicking. It is possible touch them from passenger side of engine with long stethoscope rod. Lift cop at nr 4 and 5 for 1/2" and hear sound of sparks when electric connector to cop are connected. When lift more at nr 4 nothing happen to engine speed but when lift nr 5 more engine slow. Same for nr 1 and nr 2 when disconnected electrical connectors to cop engine revolution slowed. So no solution in sight at moment.

 

Went to bar, misfiring. But when I start drive home no problems. I did keep cops, 3 of them that I have for backup, in garage for one year. Probably it get rusty. Will switch keeping them and other electrical parts in my apartment. However it is good chance to have same problem tomorrow again. Will see. Will google how to store car electrical parts.
Edit could be when I test cop at nr 4 that it has some sparks but not enough for proper firing.

 

Did drive past week, because of bad bearing at tl, my F250 around. I do not understand how people can be happy driving around tanks, or semis, all time. Small car and pickup only solution for me.

 

Did test drive this morning and still driving nice. Check engine is on but not blinking. Checked spark plug that pullet yesterday and read 3,12 kohm. How much I googled value of new is 5 kohm but 3,12 is acceptable. Old spark plug is ngk iridium. Will check old coil ohmage afternoon. Theory is now it needed time for cop that was in garage to start sparking in full force. Will see if will come back to misfiring, I hope not. Happy testing of fuel injectors work well with stethoscope otherwise would went in wrong direction thinking that fuel injector is bad.

 

A few days latter all good. Check engine light disappeared. Why "new" coil didn't work right away? Or coil was rusty or cylinder was flooded from misfire. I can get used of this way of my life. I go to bar and hold myself for beer and whatsoever problem solve itself at his own. Stethoscope work like champ in testing of fuel injectors. Per advise from one youtube video I checked resistance of known good coil that is in car and those that I pulled out. 1-2 prong, of 3, resistance on good is like 10 mohm and at one that I pulled out it read like 1,3 kohm. So difference is in mohm and kohm.
Like always you guys was helpful with yours comments. Tank you.
This case made me decide that will open bar/restaurant and buy Ferrari and smile to world out of my Ferrari.