Hsitation Under Boost (no Missfire!)

[Nick378]

Here it is...

First of all the car is a serie 1 R33 rb25det with 12 psi on stock turbo, stock intercooler, and greddy profec b spec II boost controller.

I have a hesitation under boost. At WOT, the boost drop to 8 psi then goes up to 12 psi within 1 second and it's always doing it! I can see the variation very well on the boost controller. It has been doing it for the past 3 days and i can't see any causality reasons to it...

Is there someone here who might know the problem??

Thanks y'all and if i can add any other specifications, just tell me!

Nick

[TiTAN]

Stock ECU? probably hitting R&R (rich and retard) backs off the ignition timing and dumps fuel into the engine as a safety measure to boost spikes and such. If you drop the boost to 10psi does it still do it?

[Nick378]

Stock ECU? probably hitting R&R (rich and retard) backs off the ignition timing and dumps fuel into the engine as a safety measure to boost spikes and such. If you drop the boost to 10psi does it still do it?

I understand what you are saying. I tried to run 9 psi and it doesn't change anything. I do have the stock ecu but i use to ran 12 psi for the past 2 months without any troubles so..

[Nick378]

Anyone?

[ABuSD]

Still could be that reason, maybe its never happened before the last 3 days cos it hasnt been cold enough?

Ive got a similar problem but I know its my actuator.

Sorry for my incompetence but what did u mean by "WOT" in your first post?

[Nick378]

Still could be that reason, maybe its never happened before the last 3 days cos it hasnt been cold enough?

Ive got a similar problem but I know its my actuator.

Sorry for my incompetence but what did u mean by "WOT" in your first post?

Where i live, in Canada, the temperature didn't drop bye one for the past 3 weeks lol. It should begin shortly though.

WOt = wide open throttle.

[inthisglass]

its the greddy profec

i have one

its a POS

doesnt hold boost levels well

get a different boost controller