Erratic Idle + Black Smoke

[gL3nJaMiN88]

Hey guys only about 2 weeks ago my car was running fine but the last week when ever i start my car it sounds like a rotory as a first start it then it blips on idle like i have a massive f**k off cam in it , and every time it pulses it blows black smoke out the exhaust , and i mean REALLY black! sometimes it covers the whole front yard it black smog ! .. it continues to do this for around 5 mins then it goes away sough of , until you rev the car and it starts all over again .. does it worse when cold but does it all the time when its warm , i've pulled off AAC and cleaned it , Cleaned AFM and tryed injector cleaner + new fuel filter and just about ready to push my car off the cliff im sick of it . I'm really starting to hate my skyline because of this isse! can somebody please help me?

ANyone with PFC Please Post ur INJ Map for ur 20x20 on ur PFC so i can roughly see ur injector settings and also im running 20 timing it looks like on pfc but my timing reading is false i think

[N I B]

Check all intake/Intercooler pipes for a leak, The problem is almost 100% likely to be this.

[paulr33]

its nothing to do with the PFC. as the previous guy said check the basics and intercooler pipes

its likely a joiner has come loose or a pipe has come apart or joiner split

failing that, to prove the PFC isnt at fault, get a stock ECU and plug it in, youll likely have the same issue is the PFC isn't at fault

[Guilt-Toy]

its nothing to do with the PFC. as the previous guy said check the basics and intercooler pipes

its likely a joiner has come loose or a pipe has come apart or joiner split

failing that, to prove the PFC isnt at fault, get a stock ECU and plug it in, youll likely have the same issue is the PFC isn't at fault

maybe not....

I will PM you some instructions to try gL3nJaMiN88

[gL3nJaMiN88]

i doubt its my intercooler piping leaking ? i'm pulling 17psi and it boost's fine and holds boost to around 15 to redline .. so yeh ill have a look at it , i did change nearly all the silicone except the throttle body one . its a weird size? does anyone know if its 2.75 to 3.00" ??

[R31 POWER]

Did you fiddle with the afm settings? Just remember when leaving the afm screen it will use what you have left high lighted.

[gL3nJaMiN88]

i'm pretty sure it doesnt have anything to do with my AFM .. I'm running a Z32 and it was set up by the tuner? it is set at VG30 AFM and when you go into it the number 1. Is highlighted in black .

I just figured out how to fix my problem totally , but it's only a bandaid fix. I went into settings and then when to IGN/INJ and i went to where it says " INJ CORRECTION" now while the car is on red i set the setting from "1.00" to "0.800" and then start the car , It starts like a brand new skyling and idles perfect and does not spit out black smoke what so ever .. and once the car has been idling for a while i set it back upto "1.00" and it still idles good .

When i start the car WITHOUT the bandaid approach it does the blurp blurp fluctating between 300rpm to 1500rpm in short quick bursts and blow's black smoke everywhere and it deffinatly smells like unburn fuel and it turns my rear bar into an ash try!

Somebody please help me ?

Anyone running :

GT30/71R

Sard FPR @ 42PSI on idle

Walrbo Fuel Pump

High flow injectors around 500cc i think ( mine is set at 95% Duty in injector)

Please post ur INJ Mapping from ur Power FC .. Also ur INJECTION section and Water Temp Adjustments .. It might help me ( Im not going to modify settings i just wanna see what you guys have )

Any help on this issue will be much appriated .. I have just spent big money on tune and tuner does not wanna even look at it , so im pretty much only depending on you guys to help me

[gL3nJaMiN88]

so does anyone have any idea whats going wrong? i cant find anyone who can help me

[JonnoHR31]

what do you mean number 1 is selected? the first afm is stocker 33, z32 is the 3rd one, altho if you had those mixed up it would make the car run lean, not rich.

if your injectors are 500cc and your correction is at 95% then thats a problem. correction needs to be figured out by diving the standard size by the new size. 370/500 = .74 or 74% which would be almost exactly what you ended up with when you set the temporary correction to .800. to have a correction of 95% your injectors would have to be flowing 390cc. if yours are bigger than this then take your car back to whoever set it up like that and get them to fix it.