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#21 | |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 168
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"Port Throttle Opening Point vs. RPM" "Port Throttle Closing Point vs. RPM" |
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#22 | |
Join Date: Aug 2005
Location: Fishers, IN
Posts: 809
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Dom, you have to change it in the program code (not the calibration). It?s an instruction change to open at or above zero tps. As stock the instruction is ?above? zero. Is it necessary? No. But I haven?t seen a problem with the short pulse width at idle either. Of course, there is a separate table to make sure that is right for any new injectors. Sent from my iPhone using ZR-1 Net Registry
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#23 | |
Join Date: Aug 2005
Location: Fishers, IN
Posts: 809
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Btw, to default the valet key to full power in 91+, it requires a one byte change in the program (not a calibration variable). When the ecu initializes at startup, you have to clear a bit (or set it, I can?t remember off hand) so that the mode doesn?t default to valet. Sent from my iPhone using ZR-1 Net Registry
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#24 | |
Join Date: Aug 2005
Location: Fishers, IN
Posts: 809
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nonetheless, the fix you noted is right... expand the limits outside of anything the vac sensor will see.
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#25 | |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 168
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Interestingly even though I had a 61 stored, the engine was not limited to 3000 RPM. Maybe the limitation is only while actively being detected and not for historical codes. Last edited by scorp508; 06-06-2024 at 09:49 AM. |
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#26 |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 168
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Code 56 has a helpful approximation chart.
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#27 | |
![]() Join Date: Jan 2024
Location: Boston, MA
Posts: 168
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24.44 max vac KpA to close: This seems to roughly align with the FSM saying if the vacuum to actuators drops <21 kPa it'll set DTC 61. 41.78 min vac KpA to open: This also seems to roughly align with the FSM stating the secondary air inlet valve reservoir tank going <41 kPa triggers the vacuum pump to turn on. It's possible my existing BIN just has odd values with the 17/24 or whoever set them had an XDF conversion off. Last edited by scorp508; 06-06-2024 at 10:34 AM. |
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#28 | |
Join Date: Aug 2005
Location: Fishers, IN
Posts: 809
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N = E * 2.70045 + 28.7640 N being the decimal value of the raw hex. In BFXB I see 0x55 hex, or 85 dec. for the first value. same for BMCB.
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#29 |
![]() Join Date: Jan 2024
Location: Boston, MA
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Thanks, Todd, I also see 0x55H (min vac to open), then 0x26H (min vac to close) of BMCB.
With the conversion you gave... Min Vac to Open 85 = E * 2.70045 + 28.7640 Works out to E = 20.82 kPa, nearly 21 , and aligns with <21 kPa in full mode setting DTC 61. This looks pretty spot on. This next one confuses me, unless it should be using a different conversion. Min Vac to Close 38 = E * 2.70045 + 28.7640 Works out to E = 3.42 kPa. Not sure what to make of that value without reading the code around it, unless it should be using a different conversion or unit of measurement. -Brian Last edited by scorp508; 06-06-2024 at 11:22 AM. |
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#30 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Here's the conversion formula in the .xdf I have w the values calc'd from a stock $F0 BKKR bin. That's the conversion formula in the .xdf I sent you Brian.
The 10 and 104 value are what Haibeck uses along with others w secondary delete.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX Last edited by XfireZ51; 07-13-2024 at 10:38 AM. |
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