ECU Clear/ Reset - Page 6 - RX8Club.com

Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

ECU Clear/ Reset

Old 10-26-2009, 07:09 PM
  #126  
Registered User
 
Join Date: Oct 2008
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
ECU clear/Reset

I completed the ECU clear/Reset on my 2004 RX8 tonight due to the P0610 error code.

Well I ran into some problems.. it jumped my odometer 39,000 miles... from 60,000 to 99,000

The car seems to be running really hot and the speedometer is WAY off.. i'll be idling and it will say im going 40mph...

I followed the directions to a T.

Any help on this would be appreciated..
NickR is offline  
Old 10-26-2009, 07:16 PM
  #127  
sold the 8... :(
iTrader: (7)
 
Join Date: Feb 2008
Posts: 4,917
Thanks: 0
Thanked 0 Times in 0 Posts
^sounds like you need a new PCM

That code refers to a software malfunction
Someone on this forum ended up getting the pcm replaced

Found the post:
https://www.rx8club.com/showpost.php...1&postcount=28
05rex8 is offline  
Old 11-18-2009, 07:26 PM
  #128  
5 Boro Rotary......5BR
 
Youwonder's Avatar
 
Join Date: Apr 2009
Location: Queens NY
Posts: 638
Thanks: 0
Thanked 0 Times in 0 Posts
im guessing i need to do this when i install my intake this weekend to reset my ecu..???
Youwonder is offline  
Old 11-28-2009, 10:11 PM
  #129  
pup
holla if u hear me
 
pup's Avatar
 
Join Date: Oct 2008
Location: on a softball field somewhere
Posts: 192
Thanks: 0
Thanked 0 Times in 0 Posts
i just installed a catback exhaust.....should i do this also?
pup is offline  
Old 12-01-2009, 08:17 AM
  #130  
ProfDean
 
ProfDean's Avatar
 
Join Date: May 2006
Location: Horseheads, NY
Posts: 47
Thanks: 0
Thanked 0 Times in 0 Posts
How do you change the rear O2 sensor?

I got a CEL yesterday morning with a code of P0037 which I know is the rear O2 sensor. I believe it is telling me that it needs to be replaced. However, I had just filled up my car with gas the evening before I got the CEL. So, I checked the gas cap to be sure it was tightened. In fact, I removed it and replaced it to be sure it was screwed on properly, but I am still getting the CEL. It looks like I will probably end up replacing the rear O2 sensor. I have read a thread here that I can get one for around $80 on ebay so I will check that out. Is this something that I should be able to replace myself? If I have to drop the gas tank or something else major then I will end up going to the dealer (groan). Thanks for any help in advance.
ProfDean is offline  
Old 03-03-2010, 04:05 PM
  #131  
Trained true Killers
 
the1jesster's Avatar
 
Join Date: Apr 2009
Location: Triad NC
Posts: 321
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for this thread before my fuel pump went out I was running extreamly lean and had been unknowingly since I bought it. before and affter the fule pump replacement the idle would bounce between 1000 and 500. On top of that I replaced the exhaust and intake with the new pump still had the problem untill to day I did both resets and smooth idle this club rocks thanks for all the help
the1jesster is offline  
Old 08-06-2010, 09:55 AM
  #132  
Registered User
 
White Water's Avatar
 
Join Date: Jan 2009
Location: St. Thomas, USVI
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
ECU codes

Hey Guys, I am desperate need of someone's assistance. I have an 2005 MT that is showing several codes: PO302 - Cylinder 2 misfire along with EPS/RKE/TPMS - U1900 codes. Engine hard starts and runs as if cyl. 2 is completely lost ( not really drivable, no power). I have been told that the U1900 codes are comm issues but how do I know what specifically to repair/replace to resolve this issue?
Mods are very basic: cat-back exhaust, cold air intake, Cobb AcessPort tuning flash (also the scanner tool used to obtain codes). Any suggestions?
White Water is offline  
Old 09-10-2010, 02:10 AM
  #133  
Zoom Zoom Addict
 
Join Date: May 2010
Location: Texas Hill County
Posts: 454
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by White Water View Post
Hey Guys, I am desperate need of someone's assistance. I have an 2005 MT that is showing several codes: PO302 - Cylinder 2 misfire along with EPS/RKE/TPMS - U1900 codes. Engine hard starts and runs as if cyl. 2 is completely lost ( not really drivable, no power). I have been told that the U1900 codes are comm issues but how do I know what specifically to repair/replace to resolve this issue?
Mods are very basic: cat-back exhaust, cold air intake, Cobb AcessPort tuning flash (also the scanner tool used to obtain codes). Any suggestions?
Cyl 2? lol hehe maybe your piston ring's are going out
VashGS is offline  
Old 09-12-2010, 06:59 PM
  #134  
Registered
 
Join Date: May 2007
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
I got the P0302 code the day after I had my car inspected for safety/emissions. I have absolutely no power loss and in fact it sounds and is running great. The guy at autozone told me it was the cylinder 2 misfire as well. After he said that I looked at him a little strange and said it was a rotary. He looked completely lost. Tried clearing it, but it is still there. I'm going to try disconnecting the battery since the terminals need cleaning anyway. Any ideas? I'm thinking maybe replace the spark plugs/wires.
unk010 is offline  
Old 09-12-2010, 09:26 PM
  #135  
Mu ha.. ha...
 
Razz1's Avatar
 
Join Date: Aug 2004
Location: Cali
Posts: 14,355
Thanks: 0
Thanked 0 Times in 0 Posts
Misfires are common.
Just clear the code.
Razz1 is offline  
Old 09-19-2010, 06:28 AM
  #136  
Registered User
 
White Water's Avatar
 
Join Date: Jan 2009
Location: St. Thomas, USVI
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
To unk010: the "cyl 2 misfire code" is correct and refers obviously to the second rotor not cylinder. I found that coils are a common problem in these cars and changing mine solved the problem and codes. Could be the initial signs that yours are going.
White Water is offline  
Old 05-08-2011, 02:06 PM
  #137  
Registered User
 
Join Date: Oct 2007
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
I am confused by the different and contradicting information I found listed below:

1.1) NVRAM stores continuos engine data like fuel trim and code situations.
Reset by pressing and hold odometer method

1.2) NVRAM is a rather unique feature. The system memorizes the profile of the eccentric shaft plate on the e-shaft pulley. It basically knows how the e-shaft spins, on an individual basis, 2 cars NVRAM will generally never be absolutely identical, they’re pretty close to unique.
As you’d imagine with such a specialized system you wouldn’t want this information relearned and forgotten very easily, relearning the profile isn’t a short process (drive cycle, dont worry you dont do anything special to relearn it). So this info is kept in a special area of the PCM it CANNOT be cleared in any way EXCEPT the proper procedure, you could disconnect the battery and do a jig for a year and it won’t erase. Reset using brake stomps method.

2.1) KAM stores sensor profiles and the actual MIL codes
Reset using pressing and hold odometer method twice.
Brake Stomp method is use to reset whole PCM.

2.2) KAM generally doesn’t store very important stuff, other then the airbag operating on KA power they dont store anything in the KAM tho they just use the same reserve power. The main thing KAM stores are things like fuel trims etc. It’s useful to reset KAM when you have lean/rich codes where the fuel trims have been able to reach 25%. It takes a while even after repair for the fuel trims to go back to proper levels, if you clear the KAM it will reset them to 0%.
two easy ways to reset, disconnect the battery and leave it like that for at least 10 minutes, sometimes longer. To expedite the process disconnect the battery and hold down the brake pedal, itll drain the KA power quicker. This will allow all codes to clear and KAM to clear.
After some research, at this time, it seems pulling the Room Fuse on the interior fusebox will also clear only the KAM.

Which one is correct?
And finally I would like to ask that if I had my PCM remapped by Knight Sport, will the above procedures reset my PCM to factory settings and lose Knight Sport's settings?

Last edited by RX484; 05-08-2011 at 02:08 PM.
RX484 is offline  
Old 05-08-2011, 02:18 PM
  #138  
Grasshopper
iTrader: (1)
 
Jon316G's Avatar
 
Join Date: Dec 2006
Location: Streetsboro, OH
Posts: 6,778
Thanks: 0
Thanked 10 Times in 10 Posts
Jon316G is offline  
Old 06-27-2012, 02:46 PM
  #139  
Registered
iTrader: (2)
 
greekunit690's Avatar
 
Join Date: Jun 2011
Location: Islandia, NY
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Sorry to revive but I just want to make sure. I just changed my air filter and cleaned th screens and maf sensor. Should I do an ecu reset? And if so which one or both? Thanks
greekunit690 is offline  
Old 04-08-2014, 10:11 AM
  #140  
Registered
 
Join Date: Apr 2011
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by raadracer View Post
Are you saying that clearing the NVRAM and KAM simply resets the PCM to factory defaults and clears any stored DTCs? What (if any) other effect does this have on the PCM, and will there be any ill effects as a result?

The reason I ask is that I recently had my 8 in for the airbag recall, and the M flash. I verified the flash with the brake pedal test, (which apparently also reset the KAM) immediately when I started the car when I picked it up. It has run fine since, with one exception. When warm, and at idle, the engine will periodically suddenly sputter from 950rpm (normal idle speed) to around 4-500 rpm, almost as if it is dying. It will then catch itself and idle back up to normal. Not a big problem, but this never occurred prior to the flash, and is a little spooky when sitting at a red light!

Do you think resetting the NVRAM and/or KAM and following the MODE 1 and MODE 3 instuctions outllined in step 12 in the new "Engine Cranks/No Start" TSB might cure this?

http://www.finishlineperformance.com...1-04-1273d.pdf

Thanks



I'm having the same issue on my car and have no clue what it is. Did you or does anyone knows what's the problem???
killa_j is offline  
Old 04-07-2017, 07:16 AM
  #141  
New Member
 
Join Date: Sep 2008
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
can someone help me ?
after Engine Rebuilt i cant reset the KAM.

i press the brake 20 times and the oil pressure doesnt go.

bevore the rebuilt it go.

Car runs normal

thx

Last edited by Naydoo; 04-07-2017 at 07:20 AM.
Naydoo is offline  
Old 04-09-2017, 08:25 AM
  #142  
Registered
 
Join Date: Jun 2015
Posts: 190
Thanked 0 Times in 0 Posts
Originally Posted by Naydoo View Post
can someone help me ?
after Engine Rebuilt i cant reset the KAM.

i press the brake 20 times and the oil pressure doesnt go.

bevore the rebuilt it go.

Car runs normal

thx
Pressing the pedal 20 times doesn't reset the KAM. Just disconnect the battery, turn on ignition, press the brake, connect the + and - cable of the car to release and charge that's left. If your fuel trims read exactly 0, then it's already reset. Otherwise it will relearn the new trims anyway.

Pressing the pedal 20 times does something different, I believe the camshaft positioning sensor?
TomX8 is offline  
Old 04-09-2017, 08:26 AM
  #143  
Registered
 
Join Date: Jun 2015
Posts: 190
Thanked 0 Times in 0 Posts
Originally Posted by NickR View Post
I completed the ECU clear/Reset on my 2004 RX8 tonight due to the P0610 error code.

Well I ran into some problems.. it jumped my odometer 39,000 miles... from 60,000 to 99,000

The car seems to be running really hot and the speedometer is WAY off.. i'll be idling and it will say im going 40mph...

I followed the directions to a T.

Any help on this would be appreciated..
Sounds like it just switched to KM instead of Miles. 60K is 97K in KM
TomX8 is offline  
Old 02-06-2019, 04:13 PM
  #144  
New Member
 
Join Date: Feb 2019
Location: Tx
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Help

Hey I'm so sorry to butt in! I'm brand new to the for and just got a s1 that has an issue and I need to know how to start a thread any direxdire would be much appreciated thanks!
Rx8mas is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
galognu
Rotary Swaps
126
05-29-2018 05:00 AM
OnebaddRx8
Series I Trouble Shooting
22
12-07-2017 09:36 AM
cliffkemp
Series I Trouble Shooting
7
10-03-2015 11:11 PM
stickmantijuana
Rotary Swaps
11
09-24-2015 12:47 AM
stickmantijuana
Non-Rotary Swaps
2
09-19-2015 03:15 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 3 votes, 5.00 average.

Quick Reply: ECU Clear/ Reset


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.