disabled egr via faa bit 11 and now crappy cold start help
#33
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So the "perfect" way to disable the EGR is to....
set Periphery 2 FCA bit 9 to 0 to disable the EGR test
and
set EGR system enable/disable to 0 to disable the EGR itself
set Periphery 2 FCA bit 9 to 0 to disable the EGR test
and
set EGR system enable/disable to 0 to disable the EGR itself
#43
EvoM Guru
iTrader: (7)
What is your mod list? (e.g. stock IX MR with cat back exhaust)
What version ROM were you on before you made the change to V7?
What version ROM are you now on (e.g. 89590715)?
Do you have all the EGR hardware installed?
Do you have a backup of the ROM prior to making the switch to V7?
#44
Evolving Member
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i use the 88590715 V7 (and always been on V7)
untouched EGR system (verified EGR vac lines are secure)...
that is my info but i think i might have found the problem.
I re-enabled the EGR sys test on the V7 88590715 recompile rom and it wouldnt idle right at all... i then noticed a step in the JDM MAP sensor section of the V7 88590715 recompile rom.
so i had it re enabled in the ECU Periphery (FAA) bit.11 but i had my rom set to:
do you think that might be the problem??
also i noticed there is a difference in the V7 88590715 rom vs the V7 88590715 recompiled rom under the ECU Periphery (FAA) bit.11.
picture attached.
i use the 88590715 V7 (and always been on V7)
untouched EGR system (verified EGR vac lines are secure)...
that is my info but i think i might have found the problem.
I re-enabled the EGR sys test on the V7 88590715 recompile rom and it wouldnt idle right at all... i then noticed a step in the JDM MAP sensor section of the V7 88590715 recompile rom.
If you wish to disable the EGR test, change the ECU Periphery2 parameter from EFDF to EDDF. (Type 0xEDDF.)
Code:
EDDF
also i noticed there is a difference in the V7 88590715 rom vs the V7 88590715 recompiled rom under the ECU Periphery (FAA) bit.11.
picture attached.
#45
EvoM Guru
iTrader: (7)
MODS in signature
i use the 88590715 V7 (and always been on V7)
untouched EGR system (verified EGR vac lines are secure)...
that is my info but i think i might have found the problem.
I re-enabled the EGR sys test on the V7 88590715 recompile rom and it wouldnt idle right at all... i then noticed a step in the JDM MAP sensor section of the V7 88590715 recompile rom.
so i had it re enabled in the ECU Periphery (FAA) bit.11 but i had my rom set to:
do you think that might be the problem??
also i noticed there is a difference in the V7 88590715 rom vs the V7 88590715 recompiled rom under the ECU Periphery (FAA) bit.11.
picture attached.
i use the 88590715 V7 (and always been on V7)
untouched EGR system (verified EGR vac lines are secure)...
that is my info but i think i might have found the problem.
I re-enabled the EGR sys test on the V7 88590715 recompile rom and it wouldnt idle right at all... i then noticed a step in the JDM MAP sensor section of the V7 88590715 recompile rom.
so i had it re enabled in the ECU Periphery (FAA) bit.11 but i had my rom set to:
Code:
EDDF
also i noticed there is a difference in the V7 88590715 rom vs the V7 88590715 recompiled rom under the ECU Periphery (FAA) bit.11.
picture attached.
All changing Periphery 2 to EDDF does is to disable the P0140 EGR test and the code that would otherwise be thrown, so this doesn't affect your idle.
I'd look in other directions:
1. Check for any leaks in your inlet pathway post MAF (see boost leak detection with a constant pressure source and soapy water spray)
2. Check your throttle plate is closing completely by pulling the UICP and looking into the throttle body. Clean it if necessary with carb cleaner but leave the graphite colored molybdenum coating on the inside of the TB to prevent the plate from sticking.
3. Set base idle speed as best you can using the BISS (basic idle setting screw on top of throttle body). Use the Evoscan Actuators button to activate "speed adj. screw mode" to park the ISCV (idle speed control valve) first. Try to set the idle speed ~50 RPM below where you want to idle.
4. Adjust the Target Minimum Idle tables in Ecuflash to establish the set point for RPM that the ISCV tries to maintain.
5. If all that doesn't work pull your ISCV out and make sure the ridges on the barrel that moves in and out haven't worn off. For the older type valves this is a common problem which causes them to remain stuck in the same position and unable to adjust idle speed.
Post up what you find.
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