Jump to content
SAU Community

Rb26 Misfire

JiN_MaN

By JiN_MaN,
in Engines & Forced Induction

 Share

Recommended Posts

JiN_MaN Veteran

JiN_MaN

Posted
Posted (edited)

Possible things I can think of:

Loom from Engine > Ignitor

Ignitor

Loom from Ignitor > Coilpack

Coilpack

Coilpack Tips

Sparkplugs

o2 sensors

AFM

Injector stuck open

Intercooler leak

SO Ive started going through and changing items,

Loom from Engine > Ignitor

Ignitor

Loom from Ignitor > Coilpack

Coilpack

Coilpack Tips

Sparkplugs - cleaned and gapped, will replace with new ones asap

o2 sensors Cut and rejoined to install

AFM

Injector stuck open

Intercooler leak

Car had dead o2 sensors when bought, they have been replaced at the same time as some other items:

2 New injectors, all new o-rings

02 sensors replaced

FMIC taken off

Clutch installed

Intercooler pipes around turbos taken off.

Car is running very rich, any other suggestions as too what it could be would be much appreciated,

Edited by JiN_MaN
Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/
Share on other sites
JiN_MaN Veteran

JiN_MaN

Posted
  • Author
Posted (edited)
Loom from Engine > Ignitor

Ignitor

Loom from Ignitor > Coilpack Tested other one, no difference

Coilpack Tested other ones, no difference

Coilpack Tips New ones fitted

Sparkplugs - cleaned and gapped, will replace with new ones asap Replaced

o2 sensors Replaced but cut and rejoined wires to install

AFM

Injector stuck open

Intercooler leak Looked over all seems good.

+ Reset ECU

Edited by JiN_MaN
Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4598733
Share on other sites
Moodles2 Grand Master

Moodles2

Posted
Posted (edited)

Bad batch of fuel?

How does it idle (and what does it show the vacuum pressure as when idling)?

If you don't run a FPR, look into the pressure regulator

Does your ECU give you an error code(s)?

How is compression in each cylinder?

Edited by Moodles2
Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4598783
Share on other sites
JiN_MaN Veteran

JiN_MaN

Posted
  • Author
Posted (edited)
Bad batch of fuel?

How does it idle (and what does it show the vacuum pressure as when idling)?

If you don't run a FPR, look into the pressure regulator

Does your ECU give you an error code(s)?

How is compression in each cylinder?

fuel filter... :( ?

running standard ECU?

Is the ignitor grounded?

If not do it!

Will look into all these suggestions today and update, Thanks for the help, keep it coming, Ill take ANY suggestions,

Standard ECU, supposedly remapped my mines

Edited by JiN_MaN
Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4599381
Share on other sites
JiN_MaN Veteran

JiN_MaN

Posted
  • Author
Posted

Ill also add, I started and drove it in Japan, just up and down the road and it idled fine, but when I first picked it up in aus it had the front bar moved and the intercooler hoses on both ends off. It was all removed in Japan.

Havent got it to idle since, Compression test came up with 155-153psi across all cylinders.

Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4600826
Share on other sites
Beer Baron Grand Master

Beer Baron

Posted
Posted

ok, that changes things. if the only thing that's changed since it was driving fine japan is piping then most likely you have a leak somewhere, or something is not connected properly (ie hoses back to front, swapped etc). you need to go over all the piping again. why was piping removed between here and japan?

Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4601370
Share on other sites
JiN_MaN Veteran

JiN_MaN

Posted
  • Author
Posted
ok, that changes things. if the only thing that's changed since it was driving fine japan is piping then most likely you have a leak somewhere, or something is not connected properly (ie hoses back to front, swapped etc). you need to go over all the piping again. why was piping removed between here and japan?

I assume it was to remove the front bar for shipping, and they hadn't done it before, all bolts to remove the front lip from the front bar had been removed and kept in bag.

Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4603495
Share on other sites
Beer Baron Grand Master

Beer Baron

Posted
Posted

the symptoms really do point to an air leak. even more so considering the chain of events:

car started, idled and drove fine.

you left car

piping was removed/messed with

piping was replaced

car wont idle, run or drive properly

I know where I'd be hunting the problem. leaks wont always be visible to the naked eye. go over every piece of induction piping.

Link to comment
https://www.sau.com.au/forums/topic/270272-rb26-misfire/#findComment-4603671
Share on other sites
  • 3 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      Boost cut after swap(RB25DET NEO) R34

      By Kinkstaah · Posted

      I used to have Walbro 255's when they were a pretty common update. (or were they 044? 040?) In any case I had a dirty tank. I thought the tank was good, but I would find the filter would clog in maybe ~50km of driving. If the issue persists, well, your fuel system or tank has crap in it that the pump is sucking up.
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      Hi. Ok thanks for the info. I/we do not know what tune is on that Nistune ECU so it is why there is stock ECU and that Nistune is for later when the car is done. I have guy who tunes Nistune and other ECU so i will then take it to him to see and properly tune for the car   And for the update. On 99,9% it is bad fuel pump. Which is wierd cuz it is like 2 years old(brand new walbro 255) and that filter (also brand new) was dirty.  I was alwaya pumped premium(100) on very good petrol station so i dont know how is that possible...  
    • zillah
      Recommendation for engine oil funnel spill free

      By zillah · Posted

      Dear folks My family members have 4 different cars : Triton 2015 and Corolla 2011 and Mazda3 2012 and Hyundai Elantra 2014 Looking to buy engine oil funnel spill free What I found are are below  https://www.amazon.com/gp/aw/d/B0BBTTJNKX?ref=ppx_pt2_mob_b_prod_image&th=1 https://www.ebay.com.au/itm/145553221359?srsltid=AfmBOoqYBU6Ptw0LU_bAp_k67U3qkF97HHvePkA7iHZw8vUmiwoIRaRr https://www.amazon.com/gp/product/B09X23TCS5?th=1 Is there a funnel with attachment that fits most cars ? Don't mind to spend for a decent quality  Thx  
    • Kinkstaah
      Boost cut after swap(RB25DET NEO) R34

      By Kinkstaah · Posted

      Stock ECU (or more accurately stock tune) absolutely refuses to go over 10psi and behaves like you have seen. The Nistune is the same if it is the stock tune. If the Nistune chip has been tuned, the resulting tune could be literally anything for any combination of parts. The Nistune just makes the stock ECU Tunable.
    • Kapr
      Boost cut after swap(RB25DET NEO) R34

      By Kapr · Posted

      So stock ECU does not like anything above 10 psi?  That Nistune one is just for "try" if it will be any different, I know it need to be tune for that. I know but YOU may know about these problem but i/we dont. They few little Skylines here let alone people who know anything about tham so that is why iam asking here  
×
×
  • Create New...