Fuel Cut

Hitting fuel cut on my 1JZ powered MKIII Supra. Started cruising in 4th, then laid into the throttle. Twice.

Relevant Mods: 3" Exhaust, 2.5" IC piping, 3" IC. Stock boost levels.

Category:

Autos & Vehicles

Tags:

• MKIII
• Supra
• 1JZ
• Twin
• Turbo

[CryoSlash]

I agree with brent here...

[BlackMKIII]

Actually, now that I've gotten it tuned with the AFC Neo it doesn't happen anymore. Twas fuel cut it was!

[colocho19]

check your couplers i think ur leaking.

[BlackMKIII]

Nah. Boost is strong, just the ECU.

[you449]

How's it running now

[idontlikeclair]

sounds like a bloody db9!!!

[zeddygt]

thats fuel cut sickner

[johnnydogg87]

im hitting a really bad fuel cut in my mazdaspeed....its nasty i bought bigger injectors but now there too big and there just sitting in my garage until i get a safc!!!this sucks lol but you gutta love turbo cars lol

[andicuri]

Ok my Car Does The Same, I have a Glanza Running at 17 Psi.... And this Started Happening And a Friend of mine Told me its Was Fuel Cut... Now What should i Do...???? Help me out!!

[MrEfack7861]

if you have the right mods done and your engine can handle the boost hks fcd type k is a cheep way fo getting around it be sure you have a wide band o2 and meter so you know when you are leaning out your engine

[bmwstrrcr]

yep fuel cut is a bitch. I'm on stock injectors for the moment and it's pretty bad

[Fubar231]

As for the guys in the GSX's that are hitting fuel cut, you might want to try and upgrade your injectors, or get a tuning device and try to get our of your pig rich stock boost map. Almost every stock boosted car is in the 10's for AF/R's.

[Fubar231]

Once it hits 1500hz, BAM, fuelcut!

As for the guys with the GSX's, since your probably still on the stock ECU, your probably hitting 100% inj. duty cycle and your ECU is causing fuel cut to help save your engine.

To get around fuel cut in a MK3 you need a bigger AFM (V8 Lexus AFM) Accomidated by some larger injectors (550cc's are common). Once these have been installed with a new fuel pump, you can then tune out fuel cut @ low psi's, and it will be more around 20+.

[Fubar231]

Let me throw this out there for everyone whos asking about fuel cut. I have a MK3 supra so i can refer to it, not so much about the GSX guys or what but here we go.

The supra has a karman sensor placed before the turbo (AFM), and measures airflow in hz. Idle is around 5hz, and so forth. Once the car hits 1500hz (Turbo sucking in more air, more air = higher hz) it will hit fuel cut. Thats for our car that is. But it happens because your maxing out the AFM @ 1500hz.