Overboost Fuel Cut Delay

dux10 · **Joined:** Tue Jun 05, 2012 7:37 pm **Posts:** 81

I know the 16 bit cars have a delay for overboost fuel cut defined, and I was wondering if anyone has been able to dig these out for some 32 bit models. I've been trying forever to try and find it in AE5Q100L 2014 USDM WRX, but have come up empty handed. If anyone could help out that would be great!

So far I haven't found any OS 32 bit ROMs with this defined. It should be a 1D value. Right now I am looking for this value in order to have immediate overboost fuel cut. I think only the newer CAN-BUS cars have this enabled. I could be wrong. If you guys need more information about the ROM etc I can try and answer it. :mrgreen:

Thanks in advance!

dux10 · **Joined:** Tue Jun 05, 2012 7:37 pm **Posts:** 81

Anyone? I know this code exists! :twisted:

td-d · **Posted:** Mon Feb 10, 2014 1:31 pm

Have you tried the uint8 value at CBC79?

td-d · **Posted:** Mon Feb 10, 2014 1:38 pm

The hysteresis value is at CC5B4.

throttlehappy · **Posted:** Mon Feb 10, 2014 2:50 pm

You can also use MAP CEL Voltage as a cut too

dux10 · **Joined:** Tue Jun 05, 2012 7:37 pm **Posts:** 81

td-d wrote:

Have you tried the uint8 value at CBC79?

That Looks like it! :mrgreen:

Thanks a ton td-d. I did get the same value for the hysteresis value as well, which is a good sign as well.

Also for those of you out there who it matters, here are the boost control disable tables for that ROM. Definitely useful with an EBC and Launch control to help build boost and keep the solenoid from shutting.

Code:

   
<table name="Boost disable during fuel cut-RPM threshold" address="C0BD0" type="1D" level="1" scaling="RPM" />
<table name="Boost disable during fuel cut-Load threshold" address="C0BCC" type="1D" level="1" scaling="EngineLoad(g/rev)1" />
<table name="Boost disable during fuel cut-Boost(psi) threshold" address="C0BC8" type="1D" level="1" scaling="ManifoldPressure(psirelativesealevel)" />

Professwrx · **Joined:** Thu Jan 09, 2014 10:17 pm **Posts:** 394

Can these be found for the a8dh202x?

td-d · **Posted:** Tue Feb 11, 2014 9:17 pm

Professwrx wrote:

Can these be found for the a8dh202x?

Sure:

Code:

hysteresis value at C8800, counter at C81A7.

ROM:000C0614 Boost_disable_during_fuel_cut_Boost_psi__threshold:.float 1260.0
ROM:000C0618 Boost_disable_during_fuel_cut_Load_threshold:.float 1.6999999
ROM:000C061C Boost_disable_during_fuel_cutRPM_threshold:.float 12800.0

dux10 · **Joined:** Tue Jun 05, 2012 7:37 pm **Posts:** 81

Tested and confirmed: 2005 USDM LGT A2WC521C

Code:

 <table name="Overboost Fuel Cut - MAP hysteresis" address="C71C8" type="1D" category="Boost Control - Limits" level="1" scaling="psi" />
  <table name="Overboost Fuel Cut - Delay Value" address="C6B9B" type="1D" category="Boost Control - Limits" level="1" scaling="counterthreshold" />
  <table name="Boost disable during fuel cut-RPM threshold" address="C05A8" type="1D" level="1" scaling="RPM" />
  <table name="Boost disable during fuel cut-Load threshold" address="C05A4" type="1D" level="1" scaling="EngineLoad(g/rev)1" />
  <table name="Boost disable during fuel cut-Boost(psi) threshold" address="C05A0" type="1D" level="1" scaling="ManifoldPressure(psirelativesealevel)" /> 

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Overboost Fuel Cut Delay

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