Boost Cut

[JAV360]

hey guys, had my 97 stagea for about a week now and it runs pretty sweet, its got a FMI, 3inch stainless exhaust, vg30 turbo, pod filter with fabricated heat sheild, only an auto but you can't win them all.

The guy i bought it of told me there was a boost cut off at around half a bar or 7 psi, it has a boost conrtol valve but theres no difference when turning it up, Is it a boost control valve problem or more of a fuel cut program in the ECU.

Any help?

cheers, i've attatched a pic, check it out let me know what you think. paid 16k

[Race_Bred]

most likely its the boost controller, if it was fuel cut you would know about it

[Silverback]

hey guys, had my 97 stagea for about a week now and it runs pretty sweet, its got a FMI, 3inch stainless exhaust, vg30 turbo, pod filter with fabricated heat sheild, only an auto but you can't win them all.

The guy i bought it of told me there was a boost cut off at around half a bar or 7 psi, it has a boost conrtol valve but theres no difference when turning it up, Is it a boost control valve problem or more of a fuel cut program in the ECU.

Any help?

cheers, i've attatched a pic, check it out let me know what you think. paid 16k

It looks sweet with those BBS wheels. Enjoy!

[Ska]

I thought stock ECU's had boost and fuel cut?

[fcruz3r]

i was under the impression that beyond a specific afm reading...stock ecu will R&R..but not boost cut at a specific psi ...may want to get a safc to manipulate what the ecu sees from the afm...me thinks

[AlexCim]

there is not "boost cut" its just simply R&R.

My car does this mega violent thing though where it like, full on cuts out and shakes around. whats that cut?

[Duncan]

rev limiter

[stasis]

i think you better take the car in to a tuner who knows RB 26 engine well for him to check on it ASAP. dont try to save $$ on these things by trying to find the problem yourself. just to be on the safer side

[Sydneykid]

there is not "boost cut" its just simply R&R.

My car does this mega violent thing though where it like, full on cuts out and shakes around. whats that cut?

You should able to fix that next week.

cheers

PS; there is no such thing as boost cut. There is no map sensor connection to the ECU, so it has no idea what boost you are running. Even if it did, the ECU doesn't CUT anything. The ECU knows about ariflow (via the AFM) and when the airflow gets too high the ECU retards the ignition and adds some fuel. On SAU we call that Rich & Retard mapping (R&R for short). It is Nissan's strategy for protecting the engine.

[GorGasm]

i liken it to driving an EJ20R (twin turbo legacy).

So lame.

[JAV360]

ok, managed to swap the boost controller with the misses one off her 32, instant result, got it up to 14 pound and it puts you back in the seat.

[fcruz3r]

ok, managed to swap the boost controller with the misses one off her 32, instant result, got it up to 14 pound and it puts you back in the seat.

u running 14psi without any aftermarket piggyback? ...i could only manage 8psi on the stock ecu before it went into r&r