CA18DET Undefined electrical problem..

[Spawn_CA18]

Hi there guys.

i have problem about my stage 3 CA18. here is explanation,

specs :

Z32 Maf
gt2860RS
PFC L-jetro
evo 9 injectors
walbro fuel pump
all forged internals
fmic
etc.

after i installed GT2860RS, i run it at 0.75 bar for 1 month . first days after i installed GT28 in 3rd Gear with stock injectors i see %96 duty. because of that i didn't push car at all.. but after 2-3 weeks, when i push car at 3rd gear when boost comes like 4000rpm likely some ignition cut or something starts to happen . 1st and 2nd gear this cut not appears. but in 3rd 4th 5th gear when boost comes car stops revving.

after 1-2 weeks , this cut starts to happen in 2nd gear. and afterwards it starts to cut even in 1st gear.

i think it was an boost leak in intercooler or something. i checked all lines and intercooler but any leaks at all .

so first i changed fuel pump - nothing changed-
fuel filter - nothing changed -
injectors - nothing changed -
coil packs - nothing changed -
sparks - nothing changed - ( NGK 8EIX 0.70 gap / 0.55 gap tried )
check coil pack harness and small grounding cables check - no problem at all -

still in every gear when i pass 0.7 cut happens .

then i tried to hold throttle like %70 and see boost like 0.6 or so.

in %70-75 throttle with 0.6 likely boost , car goes like hell. but when i pass 0.7 same cut happens.

then much worse thing happens .

when i get into this cut , car goes to 3 cylinder i stop the car when it goes 3 cylinder, after 3-4 minutes start car again and goes back to normal. i tried again to push 0.75 boost, again it cuts and goes to 3 cylinder. after same cold it - start it car comes back to normal .

the day after this 3 cylinder thing , when i was cruising and not boosting , car goes to 3 cylinder itself, then 2 cylinder and its stopped . i tried to start the car again , it starts if i only hold gas pedal %50 throttle. And so much unburned gas smoke is coming from exhaust.

in highway i pull over and change the spark plugs. when i uninstalled sparks , unburned gas smoke is coming from spark hole of 2nd cylinder. so i understand i have no spark on 2nd spark or coilpack.

after i changed sparks , car starts 3 cylinder and i drove the car to safe place to fix what is the problem ( safe place is a highway car park )

i tried everything but car not goes to 4 cylinder normal work . so i leaved my car at car park and leave ( i was in a hurry ).

next day i go to carpark , and start the car again . still 2 or 3 cylinder. so cold it - start is doesn't work anymore..

i called a tow truck and towed my car to my home.

when i get home with car. i tried to start it again . but this time , car doesn't starts at all !

starter turns , but nothing happens , only some pops and bangs from exhaust when i force it to start.


it was a long story i'm sorry but i have to tell all details.


so... what do you think about it?

what sould i do ?

thank you

[float_6969]

First off, check the codes on the ECU. I think you're on the right track with it being an ignition problem, but the on part of the ignition you didn't address was the ignition module, or "ignition amplifier" in Nissan-speak. I would replace it if you don't get any codes from the ECU.

[Spawn_CA18]

can we read error codes on apex'i power fc? i didn't know that. i'm using power fc as i mentioned on first message.

new turbo is so close to ignition chip. maybe this caused the problem. idon't know.

but i'm going to try with another ignition chip.

after that , i think maybe CAS is causing this problem. i didn't have such problem like this before...

[boost_boy]

Float is spot-on. Check your ignitor, it's connectors or the injector for the cylinder that keeps going dead. In nissan tongue, the ignitor is called a "Power transistor".

[float_6969]

I missed that you had a PFC. You can still do a sensor check and make sure everything is reading as it should when you're having the issue. Regardless, I doubt it's the CAS. A failed/failing CAS won't cause you to drop a cylinder.

[Spawn_CA18]

i'm still at Egypt , so still i can't work on car .

but , my 2 wonderful friend is go to my place today and tried to change

-ignition chip
-cas
-tps
-coilpacks(again)
-spark plugs

but nothing changed it is still works 3 cylinder. 2nd cylinder has no spark at all.

now i think it is more complicated then i think. maybe some harness problem .

because i installed power fc after i uninstall e-manage ultimate and i connect cables again just temporary. maybe some of them is un connected or damaged .


or the worst thing that i never want to think about it . Maybe a worn out Power FC.

what do you think?

[ganma_ca]

Hey had some very very very similar problems, possibly due to the knock sensor. I ordered one but first i played with the harness and all the grounds(specifically the ECU ground). Seemed to work a little better. Check your wiring to your maf as well. I replaced the knock sensor and there was a noticeable change in engine performance, but as you say around 3rd gear there are some big stuttering problems still. Not quite sure what may be causing that but you are not the only one with the same issue.
Everything else works fine but yeah I agree high 2nd into 3rd gear some issues. it's not a big deal for me as of yet anyways. I plan on replacing the whole harness when these new ones come out, and the injectors too. I have 2 ignitors i'm sure both are in crap condition though. I'll probably end up getting a new one as well. (I had to use SR20DET coils and wire harness for a brief time because I had to order all new coils for my CA and I'm sure using the SR coils wore out the resistance in the ignitor, but maybe I'm just crazy.) Good luck and let us know if you end up fixing it.