Rb26 Hunting After -5 Upgrade

[cashie484]

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 September 17, 2015 by cashie484

[Stixbnr32]

Standard ECU is your problem.

Dont the actuators on -5's open at 14.7psi min so how is the engine coping with the extra air flow?

Edited September 17, 2015 by Stixbnr32

[djr81]

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 September 17, 2015 by djr81

[cashie484]

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 September 17, 2015 by cashie484

[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!

[djr81]

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.

[cashie484]

yea what I figured, im looking at getting it tuned very shortly, Just want to get this idle fixed before then. or should I get the tuner to play around with that?

[djr81]

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?

[cashie484]

Yea I will have a play on the weekend!

Yea will do!

apexi power fc boost controller as well

[breaker1845]

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 September 17, 2015 by breaker1845

[Anfanee]

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.

[djr81]

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

Hundreds perhaps. Those who post a dyno chart of such a combination notsomuch.

[Hadouken]

Boost leak.

And for the love of god get it tuned

[STATUS]

idle relearn should have it sorted.