Disabling EGR and fuel pressure solenoids
Feb 3, 2009, 01:06 PM
#16
The sole purpose of the EGR system is to reduce the formation of Oxides of Nitrogen (NOx). .............................. from the car, but do not disable it in the ECM, you will run into significant problems. You will likely run into detonation, the engine will run very poorly, lack power, and will probably run on the hot side as well. In addition, you will get a code 32 before running very long. If you recall from before, the ECM alters fuel and spark advance when it thinks EGR should be on. If no EGR flow is possible because you removed it, you will have a lean condition which will be further aggravated by advanced timing.
Feb 4, 2009, 08:09 PM
#21
So I assume this does disable the FPR solenoid? If so the only way around this would be to disable each bit individually?
Feb 18, 2009, 07:24 PM
#23
Need help with this. I need to enable the FPR as the car I'm currently working is still using the OEM FP solenoid and FPR. I have disabled all the EGR related bits (FAA bit 11, FCA bit 14, 13, and 9) and have left the FP solenoid related bits active (FCA bit 15, FDA bit 11) although FEA bit 7 is a fuel pressure circuit item, it is disabled from the factory for some odd reason.
I'm having issues from going back to OEM injectors from FIC750s (idle is lean with STFT low not registering and O2 feedback pinned at +25 and am trying to eliminate possible issues.
If anyone can confirm that what I've done to eliminate EGR related items while keeping FP related items activate I would appreciate it. It appears as though what I've got is correct but, another set of eyes would be nice. Thanks
I'm having issues from going back to OEM injectors from FIC750s (idle is lean with STFT low not registering and O2 feedback pinned at +25 and am trying to eliminate possible issues.
If anyone can confirm that what I've done to eliminate EGR related items while keeping FP related items activate I would appreciate it. It appears as though what I've got is correct but, another set of eyes would be nice. Thanks
Feb 18, 2009, 08:49 PM
#24
Need help with this. I need to enable the FPR as the car I'm currently working is still using the OEM FP solenoid and FPR. I have disabled all the EGR related bits (FAA bit 11, FCA bit 14, 13, and 9) and have left the FP solenoid related bits active (FCA bit 15, FDA bit 11) although FEA bit 7 is a fuel pressure circuit item, it is disabled from the factory for some odd reason.
I'm having issues from going back to OEM injectors from FIC750s (idle is lean with STFT low not registering and O2 feedback pinned at +25 and am trying to eliminate possible issues.
If anyone can confirm that what I've done to eliminate EGR related items while keeping FP related items activate I would appreciate it. It appears as though what I've got is correct but, another set of eyes would be nice. Thanks
I'm having issues from going back to OEM injectors from FIC750s (idle is lean with STFT low not registering and O2 feedback pinned at +25 and am trying to eliminate possible issues.
If anyone can confirm that what I've done to eliminate EGR related items while keeping FP related items activate I would appreciate it. It appears as though what I've got is correct but, another set of eyes would be nice. Thanks
Feb 18, 2009, 10:27 PM
#25
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all the FPR solonoid does is not let the FPR get vac at startup, witch then makes the fuel pressure higher when you first start it. i took out my solonoid and i have stock FPR and havent noticed anything. maybe if its reallly cold you might notice something. so again all the FPRS does is not let the FPR get vac when you first start, witch then makes the FP higher.
Feb 18, 2009, 10:33 PM
#27
all the FPR solonoid does is not let the FPR get vac at startup, witch then makes the fuel pressure higher when you first start it. i took out my solonoid and i have stock FPR and havent noticed anything. maybe if its reallly cold you might notice something. so again all the FPRS does is not let the FPR get vac when you first start, witch then makes the FP higher.
Feb 20, 2009, 12:06 PM
#29
This might help evo8dad.
<!-- *** ECU PERIPHERY *** -->
<table name="ECU Periphery0 (FAA) Bits" category="Periphery" address="faa" type="2D" level="2" scaling="blobbits">
<table name="Periphery Bit Number" type="Static Y Axis" flipy="true" elements="16">
...
<data>bit.01, 0=Disable Rear O2 Test and fault report .</data>
...
</table>
</table>
<!-- *** ECU PERIPHERY *** -->
<table name="ECU Periphery0 (FAA) Bits" category="Periphery" address="faa" type="2D" level="2" scaling="blobbits">
<table name="Periphery Bit Number" type="Static Y Axis" flipy="true" elements="16">
...
<data>bit.01, 0=Disable Rear O2 Test and fault report .</data>
...
</table>
</table>
How did you determine this? I'm curious because I've been looking at the subroutines that use this bit, and I don't think this description of it is correct.
Feb 20, 2009, 08:27 PM
#30
Code:
<!-- *** ECU PERIPHERY *** --> <table name="ECU Periphery0 (FAA) Bits" category="Periphery" address="faa" type="2D" level="2" scaling="blobbits"> <table name="Periphery Bit Number" type="Static Y Axis" flipy="true" elements="16"> ... <data>bit.01, 0=Disable Rear O2 Test and fault report .</data> ... </table> </table>