33 Rb25det Boost Problem

[r33 dylan]

Hi guys, been searching everywhere for an answer but cant seem to find a pinpoint one so im hoping you guys can help.

Basically when i hit about 4.5-5 revs the car just seems to die in the ass and not want to go anywhere at flat foot but if i creepy up the revs at 1/2 throttle and then 3/4 throttle then flat foot it at higher revs it goes like a rocket but after giving it that little boot full the turbo seems to completely stop working and wont even spool up or flutter for ages unless it sits for awhile or car is turned off.

Now when im flat foot it just feels like its choking and struggles to move through the 4+ revs or even the lower revs when trying to accelerate a little quicker then normal.

also when putting the boost up to say 10-11 psi the turbo always spools but its like the ecu doesnt know what or how to handle this bit of extra boost and just wont go anywhere aswell.

hopefully i have described this decently enough to have you gurus tell me how to fix this issue, as it seems to be a trick to try and put into words how to describe whats happening lol.

specs- rb25det neo, all stock setup except for coilpacks which are probably less than a year old (splitfires), changed plugs less than 2 weeks ago.

car has only recently in the last couple weeks started having this issue and before that it was a fun and reliable car to thrash around.

cheers

[Dose Pipe Sutututu]

I don't think you searched enough.

[r33 dylan]

I don't think you searched enough.

I have but i wanted to post my own car symptons as it could be anything.

Instead of being a smart ass why not just contribute your ideas ?

Cheers

[Gcjosh]

Search nazis should be shot, a bit like small dick punctuation nazis...

anyway back on subject, you changed plugs now have issues? Is that the only thing you've done? What's your air filter like? Fuel filter?

Air/fuel/spark [emoji6] check those first

[scotty nm35]

Either put everything back to stock, or tune the car.

You can't just go bumping the boost up without tuning, it will run like balls and perhaps throw a turbine wheel. It will run even worse if you have a highflow turbo you don't know about.

[GTofuS-T]

changed plugs less than 2 weeks ago.

car has only recently in the last couple weeks started having this issue

Possibly answered your own question...did you correctly gap the plugs?

[r33 dylan]

Everything is back to stock, was just driving home from the gym and it seems once the turbo spools up to a certain point and I off the accelerator it just stops working.

Plugs were gapped correctly and I'm under the impression I'll need to go for a tune, was just seeing if anyone has any ideas. I'm very new to the forced induction life, lesrn from

Your mistakes I guess.

Cheers guys

[Ben C34]

Misfire as you described is so common.

Bullshit you searched.

Gap too big, coils rooted, too much boost, not tuned.

[Dose Pipe Sutututu]

Turn you boost down, colder weather means denser air. More "air" read by the AFM means a higher TP Load, and because it's a stock ECU and tune you're hitting cells where timing is absolutely retarded as fk.

Boost doesn't equal TP Load, you might be able to run 10/11 psi in summer or so but when it's cold you'll hit those cells running the same boost.

I suggest you turn down the boost.

[r33 dylan]

Turn you boost down, colder weather means denser air. More "air" read by the AFM means a higher TP Load, and because it's a stock ECU and tune you're hitting cells where timing is absolutely retarded as fk.

Boost doesn't equal TP Load, you might be able to run 10/11 psi in summer or so but when it's cold you'll hit those cells running the same boost.

I suggest you turn down the boost.

Have turned boost back to normal but is still having issues

[Gcjosh]

Take off your air filter and go for a drive, see if it still does it

[Gcjosh]

And if you've got standard air box just remove the hose between the afm and the box so it doesn't suck any leaves and shit the might be in the bottom of your air box

[scotty nm35]

Sounds like your AFM has dry joint inside it then. Cut it open and solder the pins first, there is a how to on here somewhere.

A new Z32 AFM and a tune would likely fix it too.

[r33 dylan]

And if you've got standard air box just remove the hose between the afm and the box so it doesn't suck any leaves and shit the might be in the bottom of your air box

Will go give it a try, thanks mate

[r33 dylan]

Sounds like your AFM has dry joint inside it then. Cut it open and solder the pins first, there is a how to on here somewhere.

A new Z32 AFM and a tune would likely fix it too.

Thanks dude, I had a feeling it might be the afm so I'll go sort out a z32. I appreciate the feedback

[Dose Pipe Sutututu]

and note that the Z32 won't work on your stock ECU. Time for an aftermarket one or a nistune daughterboard