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Please Help My Rb26

WHITEBEAST

By WHITEBEAST,
in Engines & Forced Induction

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WHITEBEAST

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Hi all, I have an issue with my RB26. After it warms up, or after a squirt. Once the cold air circuit closed loop has opened. It started off really intermittient. Now it is getting worse. Shutters/hunts and stalls. Started off happening on the highway where it would be driving fine untill it starts surging/misfiring, feels like ECU cuts ignition and fuel, and it stalls, restart/jump start then it will be fine for a little while. I managed to get consult plugged in, and logged data stated faulty Mass Air Flow Meter code## (mind you this could of been from past unplugging of sensor, from having to clean oil out of sensors with contact cleaner (Co2) was causing simuliar problem earliar to this) have now pulled off most of piping around turbos down to housing, now clean!. I can see a little puddle of really sluggy oil (amount of a 5c piece) in bottom of back turbo housing, was also a small amount in front housing (blowback from running 12 psi now maybe) installing a catch can this time. Front turbo shaft feels ok no oil around it, can't reach back turbo shaft or get any further visual inspection of it, apart from a slight amount of greasy old oil around outside of rear turbo. I am thinking it is either of many of things after been reading a few posts.

Faulty - Mass Air Flow Meter sensor/s (enough, was enough).

Faulty - Air Temperature sensor.

Faulty - O2 sensor

Faulty - CAS.

Faulty - TPS. (allways had odd idling 900-1200 rpm depending the outside temperature)

Faulty - Fuel pump (pressure).

To much oil in the system (intercooler, plenium, AAC valve, air regulator). - not fun to get at on a R32!

Turbo said enough, is enough.

Or maybe even a injector/s or even possibly a ECU giving up. If you can help to my cause it would be much appreciated. icon14.gif

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Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted
your airflow meters are catus. cleaning can only do some much. Replace them with Z32s or standard replacements.

It will fix your problem.. It happend to me...

Cheers.

they can be repaired...send them up and ill do them for you. $50ea

zillathirty2 Rookie

zillathirty2

Posted
Posted
Hi all, I have an issue with my RB26. After it warms up, or after a squirt. Once the cold air circuit closed loop has opened. It started off really intermittient. Now it is getting worse. Shutters/hunts and stalls. Started off happening on the highway where it would be driving fine untill it starts surging/misfiring, feels like ECU cuts ignition and fuel, and it stalls, restart/jump start then it will be fine for a little while. I managed to get consult plugged in, and logged data stated faulty Mass Air Flow Meter code## (mind you this could of been from past unplugging of sensor, from having to clean oil out of sensors with contact cleaner (Co2) was causing simuliar problem earliar to this) have now pulled off most of piping around turbos down to housing, now clean!. I can see a little puddle of really sluggy oil (amount of a 5c piece) in bottom of back turbo housing, was also a small amount in front housing (blowback from running 12 psi now maybe) installing a catch can this time. Front turbo shaft feels ok no oil around it, can't reach back turbo shaft or get any further visual inspection of it, apart from a slight amount of greasy old oil around outside of rear turbo. I am thinking it is either of many of things after been reading a few posts.

Faulty - Mass Air Flow Meter sensor/s (enough, was enough).

Faulty - Air Temperature sensor.

Faulty - O2 sensor

Faulty - CAS.

Faulty - TPS. (allways had odd idling 900-1200 rpm depending the outside temperature)

Faulty - Fuel pump (pressure).

To much oil in the system (intercooler, plenium, AAC valve, air regulator). - not fun to get at on a R32!

Turbo said enough, is enough.

Or maybe even a injector/s or even possibly a ECU giving up. If you can help to my cause it would be much appreciated. icon14.gif

having the same truble with mine. its a stocker. i go down the road and hold the same throttle position for 1km and then it starts misfiring. i found a small hose hangin off the fuel rail which didnt help but it wasnt the sole cause. id be reluctant to blame afm's and more lookin at fuel problems especially if your getin voilent jerks.

WHITEBEAST Collaborator

WHITEBEAST

Posted
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Posted

Hey, Been tinkering a little, getting it on dyno tomorrow, get him to check for any vacum leaks while its there. Had it on the consult again today and it faulted the MAF/s again after reseting ECU. Getting odd readings out of both sensors, points me in direction of airflow meters. Unpluged one of the MAF's and was getting simuliar fault to the ittimitient one while idling, apart from I couldn't drive at speed due to the ECU putting the rev limited down to 2500 rpm. I will post once I have new MAF/s and more info. Thinks im going down right path now, thanks guys.!icon1.gif

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