Rb30 misfiring (ausdel r31)

[Diko31]

Engines misfiring. Its okay when it first starts but then just gets worse. 

Ive replaced spark plugs, leads, fuel filter. Cleaned fuel injectors aswell as new pintle caps and baskets. Ive cleaned out the intake aswell. Injector wiring harness is okay ( im going to test everything else as i just bought a multimeter yesterday) 

Injector plugs receive voltage and injectors all have 2.5ohms of resistance. Repair manual says spec is 2.3ohms but i dont think thats an issue. 

Enlighten me ???

[Diko31]

Ran self diagnostics and the only codes that wouldnt cancel was neutral switch and heater/ac switch

[GTSBoy]

Ignition coil is a possibility. As is dirty/cracker dizzy cap, or worn wipers/posts inside it. Could be a cracked head. They used to miss like that in VLs with cracked heads, and they were often worse when warmed up.

[Diko31]

@GTSBoy

Dizzy cap is fine, as for the flanges inside it, how worn is worn? 

Compression is fine so i dont think itd be a cracked head... 

Im checking the rest of the electrical components tonight and im also replacing ecu with a spare i had laying around

[Diko31]

Hopefully she comes good 

[niZmO_Man]

Remove distributor, remove rotor, remove metal plate behind it.

Crank angle sensor (CAS) is in there. You may notice some crap on the disk. Very carefully wipe it down.

Re-assemble, set timing properly, save up for new CAS/bearing/etc

Step 0: read this https://wiki.r31skylineclub.com/index.php/Crank_Angle_Sensor