R32 Issues

[Humpty Dumpty]

Guys I have tried searching but no real help.

I am trying to sort out a issue on my bro in laws r32, it won't rev past 3000rpm it coughs and splutters when it's warm. It has a z32, nistune, walbro pump, kkr 430 and a 14psi external gate and split fire coilpacka

There is no boost leak that I can find, spark plugs are gapped at .8 cleaned the afm, I don't have another afm so I can't try that. But it's really annoying me.

Also tends to stall when you come off the gas in neutral.

I am thinking of afm but don't have a z32 to try.

Any thoughts guys

[zebra]

Could be anything.

Changed the plugs?

Does it have an atmo blow off valve?

[Humpty Dumpty]

Plugs are brand new.

Stock re-circulation bov

[zebra]

Then ye, could be a Dud, MAF, dud fuel pump, dud TPS, dud CAS, dud Ignitor

[Humpty Dumpty]

Thanks man I will keep ticking off the boxes

[Sinista32]

IMHO

1. IC piping popped off or a good leak

2. MAF

[D.I.Y. Mik]

RB20?

They say it has an oversize idle circuit. When the thingo leaks its like a boost leak.

That thing under the fuel rail that controls idle or cold start or something.

I cant remember the name of it.

[Humpty Dumpty]

Idle control valve??? It idles at 2200rpm when it is plugged in and been told by previous owner it doesn't need to run it supposedly???? (Not sure if that's right though)

It's definately not ic piping or boost leak from silicone hoses that I can see at least.

I am starting to think tps or maybe idle control valve but that doesn't sort out the 3000rpm spluttering

I think he is gonna have to take it to a tuner.

[zebra]

Wow dude, get thatshit fixed

Nissan put the IAC valve there for a reason