Jump to content
SAU Community

Recommended Posts

Hey guys after some help.

I've just installed -5 turbos, flowed exhaust manifolds and tomei dump pipes.

Started the car fine, it began to hunt at idle. Took it for a drive and drove fine except for when coming to a stop or rev when it would stall.

The car was idling fine before the install.

The engine has tomei poncams as well.

Checked all vauum lines.

Standard ECU

Was thinking possibly need bigger AFM's as mine are stock.

Any help would be appreciated

Cheers

Edited by cashie484
Link to comment
https://www.sau.com.au/forums/topic/459771-rb26-hunting-after-5-upgrade/
Share on other sites

Doesn't have extra airflow at idle, will have less. Go back and check for air leaks between the engine and the turbos. Mostly, have a fiddle with the cold air idle valve which is under the intake plenum. The Poncams will reduce the amount of air at idle and you need to increase it a little which is effectively how closed the bypass valve is when warm.

Guessing Poncam B's?

Edited by djr81
  • Like 1

I have a power fc which I installed but still had the same issue.

It drives fine, just doesn't idle properly

Also stalls after revving, possibly aac?

Is there a way to reset an Apexi Power FC without the hand controller?

Yea Poncam B!

Edited by cashie484

Yea I have been doing some research on adjusting the aac.

Just seems weird though it had the cams in before and was idling fine, a little rough but wan't hunting.

Sounds like I need to get in and adjust that then!

I have a power fc which I installed but still had the same issue.

It drives fine, just doesn't idle properly

Also stalls after revving, possibly aac?

Is there a way to reset an Apexi Power FC without the hand controller?

Yea Poncam B!

Yes same same and yes but you need to plug in stuff to hook it up to your laptop with the right software.

You have a leak somewhere. Regardless of ECU, if you don't fix the leak it's going to try and hold idle to compensate for the air leak.

Adjusting AAC or swapping anything else won't work, only masking the issue. Find the leak and fix it.

I've replaced turbos on my car and starts first time with no idle issues, there is something else you've missed.

Have you done anything with the BOV system at all? Forgot to connect something?

Edited by breaker1845

Its dead easy to fix so just fix it first. Most importantly post your dyno results after it is tuned. I know a bloke who wants to see the -5 poncam combination with a functioning boost controller on 98 octane. What are you running for boost control?

check the rb26 dyno thread. There is literally hundreds of people running this setup.

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


  • Similar Content

  • Latest Posts

    • Ah right. Maybe my rb just loves chewing through batteries lol.
    • On the R34 can't you just unplug the IACV? This is the way I've always done it on the R33. Disconnect IACV, get it idling around 650rpm, and then do a power reset on the ECU to get it to relearn idle (factory ECU).   The big reason no one has touched on as to why you'd want to get the base idle right, is that it means the computer needs to make smaller adjustments to get a good idle at 700-750rpm.   Also, cleaning the IACV won't normally make the car suddenly idle lower or higher. The main issue with the IACV gumming up is that the valve sticks. This means the inputs the ECU gives, aren't translating to changes in air flow. This can cause idle choppy ness as the ECU is now needing to give a lot of input to get movement, but then it moves too far, and then has to do the same in reverse, and it can mean the ECU can't catch stalls quickly either.
    • 12.8 for a great condition, fully charged battery. If the battery will only ever properly charge to about 12.2V, the battery is well worn, and will be dead soon. When I say properly charge, I mean disconnect it from the car, charge it to its max, and then put your multimeter on it, and see what it reads about an hour later. Dieing batteries will hold a higher "surface charge", but the minutest load, even from just a multimeter (which in the scheme of things is considered totally irrelevant, especially at this level) will be enough over an hour to make the surface charge disappear.   I spend wayyy too much time analysing battery voltages for customers when they whinge that our equipment (telematics device) is causing their battery to drain all the time. Nearly every case I can call it within about 2 months of when the battery will be completely dead. Our bigger customers don't even debate it with me any more ha ha ha. A battery at 12.4 to 12.6 I'd still be happy enough with. However, there's a lot of things that can cause a parasitic draw in a car, first of which is alarms and immobilisers. To start checking, put your multimeter into amps, (and then connect it properly) and measure your power draw with everything off. Typical car battery is about 40aH. Realistically, you'll get about half this before the car won't start. So a 100mA power drain will see you pretty much near unstartable in 8 days.
    • Car should sit at 12.2 or more, maybe 12.6 or 12.7 when fully charged and happy. If there is a decent enough parasitic load then it will certainly go lower than 12.2 with time. You can't beat physics.
    • Ok guess I can rule out the battery, probably even the starter and alternator (maybe) as well. I'm gonna clean those leads and see what happens if it's still shit I might take it to an auto electrician. Unless the immobiliser is that f**king heavy, but it shouldn't be.  If I start the car every day, starts up perfectly never an issue. Isn't 12v low, shouldn't it be around 12.5v?
×
×
  • Create New...