disable P0300 test

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Oct 27, 2008 | 08:45 PM

#16

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by draconx

add:
...
to your rom file. then when you open up ecuflash you will see 'ECU Periphery2', click on it and press the = sign up top on your keyboard. then enter in 0xEDCF and press enter. then reflash your car. thats it

. ...

That value should only be used if you want to disable the EGR test as well.

Oct 27, 2008 | 08:56 PM

#17

draconx

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oh. mybad

Oct 27, 2008 | 09:10 PM

#18

mrfred

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From: Tri-Cities, WA // Portland, OR

Now that I have confirmation that I found the correct subroutine in the ECU code, the first post has be rewritten.

Oct 27, 2008 | 09:58 PM

#19

RazorLab

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Holy crap this is huge, you da man!

Oct 27, 2008 | 10:20 PM

#20

draconx

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mrfred thank you!!!! this is awesome!!

Oct 28, 2008 | 03:03 AM

#21

cossie1

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Now I am confused as in the rom I use, bit 4 is at 0 by default.

Maybe the 7 roms are different ??

Oct 28, 2008 | 06:36 AM

#22

Kracka

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From: Prosper, TX

Awesome! I'm going to try this tonight since I've been plagued by this problem! Thanks as always mrfred

Oct 28, 2008 | 06:57 AM

#23

honki24

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From: Houston, TX

A-mazing.

Oct 28, 2008 | 07:10 AM

#24

dudical26

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From: NNJ

Quote:

Originally Posted by mrfred

The code for the P0300 test is pretty long, so besides banishing the P0300 code by disabling the P0300 test, the ECU will be a little bit more responsive to critical engine control (e.g. timing and fuel control), so I may disable the P0300 test on my own car even though my car has never thrown a P0300 error.

Have you tested this? Does the ECU log faster or seem to respond quicker?

Oct 28, 2008 | 07:35 AM

#25

mrfred

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From: Tri-Cities, WA // Portland, OR

Quote:

Originally Posted by dudical26

Have you tested this? Does the ECU log faster or seem to respond quicker?

The code is a pretty small fraction of the total code length, so I doubt it would be a noticeable improvement in responsiveness, but every bit counts.

Oct 28, 2008 | 08:57 AM

#26

travman

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From: Pittsburgh

Mrfred,

I just got a call from danl - he has been driving the car around since you sent him the rom to try. He has not picked up the p0300 code and said he believes it was a definite success.

He is out of town w/ no computer access and wanted me to relay the message.

Oct 28, 2008 | 09:11 AM

#27

phenem

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From: Central PA

Quote:

Originally Posted by travman

I don't believe you.....j/k

Good job guys!

~Zach

Oct 28, 2008 | 10:17 AM

#28

house_of_senate

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Still no code after the morning cold start!

THIS IS AWESOME

Oct 28, 2008 | 11:37 AM

#29

cossie1

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Ok looking at the JDM roms I have, they all seem to have bit 4 and bit 5 set to 0 by default.

However as I stated at the start of this thread, I have personally had the P0300 fault code come up twice, also another member on here has a JDM 8 MR and that too has picked up the P0300 fault in the past, but his rom is as above, set to 0 by default for bit 4 and 5