Hi all,
First of all i'd like to say sorry about the long story.....
I am now having the exact same issue. Cylinder 1 is not firing at all. Was fine one day and just completely dropped out the next day. I must say though occasionally on start up it would run rough like it was dropping a cylinder but within 30 seconds would pick up and run completely fine.
Im running an apexi pfc ecu.
So far we've eliminated spark plugs, splitfire coils, coil wiring harness and harness plugs. Tested the injector as in, it was wetting the plug but not igniting the fuel. Placed coil slightly away from sparkplug and we could see it sparking the top of the sparkplug but its not igniting inside the cylinder. It has been compression tested and its all good there although cylinder 1 is slightly wet with oil....
My injectors are 570cc sard and are about 5 years old and the splitfire coils are same age.
I dont actually use my skyline very much so it sits in a garage as i use my daily most of the time. So i let the rego lapse for about 2 months and in that time i didnt even start the skyline. Ive never had a problem like this before where it hasnt been an obvious issue.
Once registered and i took it for a drive around for the day it split the radiator bleed valve hose but the car didnt get too hot as i realised something was wrong as soon as it happened, i replaced the hose, filled coolant up and drove away with no issues. I started the car 3 days later and thats when it dropped the first cylinder and we've been just testing and eliminating with no success so far. Thought i'd mention what happened with the car in the lead up to the cylinder not firing.
Next step we were going for was to get a test module (black box at back of engine on top of coil cover)
I was also told to check the crank angle sensor but they are expensive things to buy for testing if thats not the issue.
Thought i'd read the sau threads as ive fixed many issues myself from people posting on this awesome site!
Skud33 does this sound like the exact problem you were having with your skyline?
Like not igniting the fuel in cylinder but sparking from the coil to the top of the sparkplug?
I did read that you checked your injector voltage and that was the problem but how did you check them?
Does it need to be checked through the ecu?
I wont be doing this myself, i will be asking my mechanic to test it for me.
Did you end up just replacing the one injector?
Thankyou so much to anyone taking the time to read my post and respond
: ) liz