RB25 S1 Idle problem when rolling

[Rezlo]

Hey guys,

My RB25DET S1 is going brilliant in my Euro S14,

I have only one problem, if im rolling 15mph + and i put my foot on the clutch the rev's kinda burble up and down then it stalls, anything under 15mph and it idles perfectly at any temprature.

Every other time its 100% fine, ran a 11.98 with it last weekend,

Its not a problem for me, but when my fiancee uses the car she tends to clutch in and roll to a stop = possible cut out.

Ive worked out it must me somthing electrical in one of the idle control solonoids, just wondering which one?

any one have any ideas?

[MELLO*SOS]

What is done to the motor?

You may want to also ask this on NICO RB forum or Racebread if u haven't already

[kouki_s14]

are you using a recirculating BOV?
if not then recirculate it and it should stop.
MAFS reads air going in but when revs drop quickly, the BOV releases the air and the ecu sees that air that went through the MAFS is missing and will kill the motor. thats the short explanation

hope that helps

[Rezlo]

It is recirculated,

Engine is internaly stock with the stock ecu, externals are the usual type of things, GT3040, custom 3" system, tubular turbo manifold, largeish FMIC with 2.5" piping, ectr ectr.

Ill put it to you like this,

Doing 50mph and slowing down, if i put the clutch in it will stall, even if i just lightly hold my foot on the gas it will idle at like 1000, 1100rpm but as soon as i take it off it will stall, and ONLY when moving over 15mph. Yet any other driving situation and its 100% perfect.

For some reason Nico wont let me register and since we lost Jon P its gone a little dead :(

[s13silady]

RB25det.org

maybe you have a unconnected vaccum line. i know on my neo there was this extra nub that was uncapped it caused my car to stall out too... i capped it up and it runs perfectly. damn nissan.

[Rezlo]

Definatly not a vacuum leak, one thing i dont have hooked up is the old presure sensor that sat on the right side behind the fuze box on my S14, dont know if the RB25 needs that little pressure sensor or what its actualy used for, I know the US versions never had it, remember my car was SR20 from the factory.