maybe flash back to stock before this cold weather is done?

beers

 

Investigating the re-flash to stock. Sounds like a good idea, and will unmask some of the trouble codes..

Interesting behavior this morning. 59 degrees on the dash, code 610 set. reset, Code 610 set. Left the key on a minute to see if there is something that will warm up, reset. Did not crank or try to start the c car at all. Then tried to start. It was hard to start, flooded. Cloud of smoke out the exhaust flooded. Then ran fine. Now, I believe that there is NO fuel going anywhere unless the engine is turning over, so I am adding fuel injectors to the trouble list...

Also, some times cruise control works with the code set, sometimes it does not. All of the events this morning did not disable the cruise control.

 

Update, still waiting on cold weather, need 2 more days, But...

I reset every fuse, found an interior light that was on, reduced the resting current draw to 1 amp (half the Room Fuse, half the BTN fuse, cleaned the ECU connectors and looked for an ECU ground (there is none).

Next step, if problem returns, is ECU re-flash. I have 2 options, the OEM tune, which will unmask some trouble codes, or a re-flash of my MM tune. There are reasons for each, but I have to pick one. I am leaning towards the OEM one to get back some of the masked trouble codes. My question though, for the Access Port experts, is this; With an AP, can I read those codes, even if they are masked?

 

Problem returned at 58 degrees. I reflashed the ECU to my tune, should not change anything, waiting for another cold spell. It was 64 this morning. Issue is below 62. The reflash is testing to see if the actual memory has a temperature sensitivity.

Car still runs fine with the issue, I seem to lose cruise control occasionally. I often cannot reset the CEL until the car has run for a minute, then things are fine.

Supposed to get in the 40's tonight.

 

there is an unrelated sensor that messes with the cruise control if it is failing. i forget what it is and will not have time to hunt for the thread till late tonight..

maybe team will see this.. i think he had the issue. it has been several years, but have seen the thread recently..

beers

 

Ah, Thanks...

Gives me a place to look. I also found a place that will re-program a used one for me and even repair mine, if they can see what is wrong. We will see how it goes.

 

well it is what i thought it was.. your good old friend neutral position switch.. to funny.

here is a thread about it, but is not the one i recall the failure from..

failure

hope this helps. really i do.

beers

 

Thanks,

Interesting one. Mine works when it works, but you cannot even turn on cruise control when the CEL light is on. Since I can start in gear, or out of gear, I am not sure if that switch is scanned by the ECU. On a positive note, after the re-flash, It started today with no issues in 60 degree weather. More testing tomorrow. Plan F is to get a used ECU reprogrammed OR get this one repaired.

 

This sound like some cold solder joint on the ECU's PCB. it happens a lot, not just RX8. probably one of those "Designed to fail" **** so they can milk u every couple years or so.

 

Did you get your pcm reflashed at the dealer back to stock? Just wondering as this us my next step to cure my p0610 code.

 

Update...

Tried several things to troubleshoot. Relays have been swapped, COBB was uninstalled, COBB base tune was tired. Issue did not go away. The 2 options are buy a used one, just as old as mine, and have a dealer re-flash or get this one repaired.

I found an outfit that repairs ECUs and is interested in working with this one. It gets sent out tomorrow for eval. Their current price to repair your an ECU, with a warranty is around $300. This one is not one of their standard repairs, yet. Mine will be the first RX8 they look at. I will let everyone know what happens.

However, if we want to encourage them to start working with the 8, I can share the business and contact.

Mike

 

wow,

nice leap mike. at least we will know the true issue..

odd but curious question.. it the neutral pos sensor a transfer from your old transmission?

been working with someone else with this via email. but it is not a ecu issue.

beers

 

Update:

Company received my ECU, stripped it down, found several issues, repaired them, and are shipping it back to me for test. My cold weather simulator may look a lot like "install directly from freezer" and I will test.

They are interested in providing services for the RX8, so this could be grand. I should be testing this weekend.

@ swoope The position switch came with my new trans. From what I can tell, that is not the issue. The code is set in the first second of operation, in gear or out.

 

That's exactly what the other person did in the thread I linked earlier ... your welcome

definitely not a position switch problem, it would also have the oscillating rpm issue too if that were the case



.

 

And thanks,

You have no idea how hard it was to put the ECU in a box and send it away. The fact I am out of town is probably the only thing keeping me sane. Car dead in the garage is a sad thing.

But, if this works, there will likely be a standard price for an ECU repair with a warrant. They treat several that way. Also, they do exchanges for other ones, so the whole re-program thing may be solved as well. I will not share what the local dealers quoted me for the work. I should know by Sunday.



UPDATE:
Got it back, got it installed.

Not cold enough yet, but ECU still works, car still starts, car runs. I have the Factory tune on it right now. I will cold soak it tonight (last cool night for a bit) and check in the morning.

 

tripped across this the other day relative to a P0610

https://www.rx8club.com/series-i-tec...1/#post4409733

 

@ Team.

Great find. That is the first time I have seen it called a PCM configuration error. I wonder if it is the configuration of the PCM, or the systems on the car. Although, I have to believe that if a part of the car did not report correctly, the PCM would identify the offending item. TEAM, I will pass the procedure on to on to the vendor.

General Update:
After the repair, issue is still present, however only the version that that kills cruise control. Although, it has been a lot colder and I have been leaving the car outside to trigger the event. I also disconnected my OBD II monitor just to see if that was the issue. After warming up a few minutes, the code can be reset. The tech report said they found several issues that were common across Japanese ECUs. Interestingly enough, it seems that there are failure modes based on company of design. We had a great conversation about designers, and getting to the bottom of issues. My failures were more Toyota like than Ford / Mazda like. Next step is to get them an ECU to reflash and see if replacing the ECU works. Then, ideally, reflash mine, and see if that cures the issue. I will be shopping EBAY today. That way we can send them back and forth as opposed to me being without a car. They do not have an 8 in their test fleet.

 

What is your ECU number?

 

Lots of numbers..

N3H6
EGI
N3H6 18 881K
5-279700-777
12V
Denso made in Japan

*000777L*

 

@04Green
I'm having the exact same systoms as you and following this thread closley.
When you say you can reset the code, can you do it while the car is running or does it have to be while ignition on and engine off?

@Team
I took a look at that link and the procedure. When I get a chance I'm going to see if a local dealership will perform tge reflash as set out in the procedure posted. Just got to pull the info off the ecu.

 

@ My,

I am interested in what your dealer says.. Mine quoted me $200+ for the work, with NO guarantee of anything. If you can hold off a bit, I have an ECU on the way to the people I am working with for a reflash. I will get pricing soon for the commericial version. They can also go through and make repairs. Talking with them, there were several components on mine that tested as marginal. I really think I am down to a memory issue where the memory does not like the cold. It is interesting that the old stuff I see says PMC Configuration Error (Thanks Team) and the newer stuff, and the google searches all say PCM error.

What year is your car?

 

@04Green,
Mine is an 04. Never winter drove it into 2 years ago. The pcm error only happens when it's cold. I can warm up the car and then clear the cold without problem but it comes back when it's cold. The other day i had a few errands to run and didn't bother to clear the 610 error and the CEL cleared itself after 5 or 7 drive cycles (car was still warm)

 

This is the number series to compare against: N3H6 18 881K

Sorry, first 4 digits are different on mine


Let me check, looks familiar ...

 

Ok .. i tried to clean all ECU Contacts ... and all grounding points ... nothing helped still 610 when starting @ cold temps.

Found one suspect thing ... my reverse switch is leaking a bit tranny oil ..... i get me a new one and install it in spring.

I'll try a Heated ECU Next week. Maybe it wants some love/heat

Will report back ...

Thomas

 

Cool,

Where I am on this, after looking at the TEAM posts that call 610 a PCM Configuration Error, not a PCM errror, is that the memory is aged, hosed and or cold sensitive. For testing, my trips below about 62 degrees. If close to that, I can just leave the key on a minute, then reset the code. The colder it is, (say down around 40), the more work to fix it. I have to run the car for a few minutes, shut it off (beware a flood) and then restart and I can reset the code. Drive down a straight piece of road, turn off the key for a few seconds, turn it back on. Reset at next light.

I have a used ECU heading to the company I am working with. They should have it early in the week. They are going to reload it and repair any weak components. the thought is the reflash (in the posts above) will work. I will test it when they get done and send them mine. We will see if just a reload on that one works as well. My guess on mine is that the config data for cruise control is hosed, that is what dies when I get the CEL. more data soon.