**Aflac's MS thread plead for help**
 

I've been trouble-shooting along with Scott's gracious customer service expertise for about a month now and we hit a point where were stumped.

Problem: The car will not go beyond 3000 rpm even at WOT but it will make 5psi.

I've attached my most recent datalog. Fast forward to "5901 of 27499" to see what were dealing with here.

Having trouble uploading/attaching the log but I can email you with it attached.

Can you test the MS in somone elses car to see if it does the same thing? This is such a weird issue I don't know where to start considering you guys have been messing with it for a month.

We've been troubleshooting at it for about a month but this issue occurred 2 weeks ago (college/work has also been a hindrance on my part). I know of 2 other 1.6's and one is down for a motor rebuild and the other wont respond to my voicemails even though we go to the same university:magna:. Dan (whaaamx5) has a 1.8 so im kind of a loner on this one.

Scott suggested that maybe I have a boost leak but I was tugging at my intercooler pipes and no budge. I'll try re-tightening them down just in case.

Tugging on the pipes won't determine if it's leaking. Mine can leak on on side but not the other and still be solid mounted with the clamps. That is like testing a blown headgasket by tugging on the head to see if it comes off.
By testing it in another car i meant put the MS in another car. The MS itself will work in any miata as long as the coil outputs aren't switched around like scott used to do them. That includes possibly mailing it to someone to have them test it in their car.

Are you running HighRes? I'm having the same problem and had to flash back to the standard firmware for now.

See this thread:
https://www.miataturbo.net/forum/sho...620#post206620

he litterly cant more more than 3100RPM. this is full throttle and 5psi of boost


its not misfiring or resetting. it's like his rev limiter is 3100RPM.


I still think its a major boost leak. since its a map sensor it will still run as normal, but all the airflow is not making its way into the engine therefor it cant go faster.

Want to see msq

Don't agree with boost leak theory--even at 0psi the car should rev to 7200+

We don't have alot of information here (firmware version? msq?) but I took a look at the attached log and from what I can see the MS at least thinks it's doing it's job just fine.... that doesn't rule out 100% of possible MS related issues, but there's no fuel cut or spark cut going on. As Saboteur mentioned he's run into an issue when Easytherming the HiRes code that may have had similar symptoms-- not sure if it's the same thing or not. I'm running HiRes on more than one Miata, Easytherm'd, and not having a problem. I can share my code and will be soon anyways, but haven't had a chance to post that up yet.

Anyways... on to other non-MS related, or semi-MS related (install) issues...

If the base timing was WAY retarded you might see something like this, not enough power to pull through the revs. I doubt it though.

Otherwise... something else seems to be a factor. Thing is though, even if there was a major boost leak- it would drop to atmospheric pressure and still rev out to redline similar to a stock N/A car, just with slightly less power due to the exhaust restriction.

I'm leaning to MS or MS install related- code be code corruption, bad MSQ, something...

If you put a timing light on the crank and rev it up from idle-- does the timing advance or stay put?

Yea I would put a timing light on it and see what's going on. Perhaps the timing is too advanced, and at 3K it advances enough that pre ignition won't let it go any higher, though I doubt that's it. A wide band or even a NB would tell you if it's a fuel or timing problem, and that would help narrow down the possibilities. Also make sure all your grounds are good, as I've seen bad grounding cause the weirdest problems on cars and it's a possibility.

Saboteur was having similar issues, but he is trying to run hi-res.
https://www.miataturbo.net/forum/sho...0&postcount=87
Can't seem to get it easytherm'd, it won't rev past 2500 he says.

nick did you put those three .inc files I sent you in the correct folder? we can walk you through reflashing the firmware.


attached his MSQ.

As the guys above have said, that's the exact problem I'm having down to a tee. If he is running HighRes then read the link I posted.

My car could boost and drove fine if I shifted at 2250rpm, as soon as I hit around 2500rpm it would hit a limiter. I thought it was overboost or launch control, so I disabled all those features but it didn't make any difference. After thinking about it, I was using the same MSQ that works fine on the standard MSnS-Extra firmware so it has to be the firmware or something I am doing to it.

Cheers

Scott, we were having a problem with the software so instead Mr. Cramer gave me a link to downloaded the whole diyautotune MS software.



Alright, the general consensus is for me to take a timing light to the car to see how much timing it idles at and also while the motor is revving?

If thats fine, I should either mess with my easytherm or reflash the firmware.

Does that sum it up a little bit?

I'm still not clear what firmware you're running Aflac... maybe I missed it... version?

he's loaded with 029v. piggyback that i built.

I had a very similar problem with my Haltech setup quite a long time ago, where I could not get my car to rev past approximately 5800RPM. It drove me CRAZY for months. The car would boost fine and run fine, albeit feel down on power. It was just like the engine was incapable of rotating any faster. Eventually on a hunch, I solved the problem, which turned out to be a combination of two factors:

a) swapped ignition channels (got my BRN and BRN/YEL wires around the wrong way)
b) home edge: rising instead of falling

The setting is Haltech specific and to be honest I don't even know if it applies to MegaSquirts - I haven't installed mine in my car to be able to have a play. But once the home edge was set to falling (it's a dumb ignitor, otherwise you select rising) and the channels swapped - it was fixed.

Once I'd corrected the problem - holy crap - the car had new life. It pulled harder, went faster, and revved to whatever limit I set in the software.

I really doubt you have the exact same problem, but I'm thinking perhaps it's timing related.

Nick you could try that. you're running rising edge right now....

change to this:

http://www.boostedmiata.com/MS/power_cycle.jpg


the ignition channels should be correct, (just swap your 2&3 plug wires for #1&4), but i doubt that will work and it wont want to run at all, it will try to fire on the wrong cycle and push the piston back down when it's trying to move up....not good.

Thanks everybody, i'll see if I can give it a try when class ends later in the day.

You'll want to reset the timing when you do it, also.

PM me, if you have not figured it out, I will be home on the 22nd. Maybe I can help you out. Assuming we don't fry anything on my car.

I got a chance to mess with the power cycle today and after changing the settings, its still no go above 3000rpm

I may have found this-- It happened to me using an .msq from 029v on Hi-res. the same thing 'might' happen loading a hi-res .msq into 029v. not sure if that is the case but here are the details... see post 89.


https://www.miataturbo.net/forum/sho...t=14871&page=5

!! Thank you FoundSoul and Saboteur, and everyone else in this thread. Just have to wait for the boss man, "Scott" to chime in and see what he says since he preloaded everything for me.

Matt, this is the MS that we had trouble loading the software in. I used the same map i load everyone with and made changes from there....029v....very odd.


i guess i can make another clean map for you Nick and you can reflash the firmware. ill send you an email with how-to.

Actually it's Jerry here ;)

it may not be the same issue I saw-- but the symptoms sound at least similar. The circumstances are a bit different though. if your map was built on 029v, and he's running it on 029v, that may not be the issue. He may need to plug the unit into another car to rule in/out the MS as the issue at all and then go from there...

Who can I send my MS to :ughug:

Depending on how Scott did your ignition mods you could send it to just about anyone. If they are the same as DIYautotune has them shown then even I could test it in my car. If not you would need someone with the correct harness to test it for you. Scott should know who can most easily test your MS.

Nick if you wanna send it back to me and ill test it out on my car and make any corrections as needed. Im trying to think of who is in NC that has one....

i used the standard ignition mods, but whomevers ride it goes on needs to swap plug wires, 1&4 with 2&3 before you start it up.

subscribed as I'm having very similiar issues...
Still troubleshooting a few things with Scott, but very interested to see where this goes...AND figured I could share as well considering we seem to be after the same solution...

Aflac, how does you car behave GETTING to the 3k rpm "dead zone"??
Does it seem perfect, somewhat underpowered/sluggish, or is it completely lazy and struggles/takes forever to even get it TO 3krpm, then wont go further???
I ask because mine behaves like the last description...
I need to re-check my timing, and lean out my fuel table, and redo the easytherm as it seems my values may be messed up...after that I really dunno...
I've already disabled any settings/cuts that are rpm based, am running a open DP, and did a few other things with VERY little improvement...
Only improvement I saw was that my problem was 2k rpm, now I am close to 3k rpm....but no improvement in any other way...

Let's share what we've troubleshooted, tried, etc so we can hopefully get ideas form each other...different strokes for different folks, but could also be the same thing...or at least something similiar...

***it should be made clear that I'm not trying to say I'm unhappy with the help Scott's been trying to get me...he's been giving me alot of support, and it's obviously something hard to figure out without being present. Just figured it'd make good sense for us to pool our efforts!;)

For some reason im not getting emails sent to my inbox when someone responds to my threads anymore so im sorry for the delay.

To answer your questions and update other people:

I sent and received my MS back from Scott. He gave it a look and made adjustments but im still running into the same problem. So that leaves the problem on my end of the spectrum. Im re-tightening all of my intercooler piping again and see what happens. The car can rev past 3k at idle but won't under load. Im not running a AFM, maybe the wires are crossed up? I'll post pictures just in case i missed something.

I agree with tvalenziano, Scott has been nothing but help with great feedback.

This is gonna drive us nuts jdm, I'll doing all the troubleshooting scott gave me tomm, as well as any suggests in the thread I started "tony's troubleshooting thread"...feel free to share, as will I so we can work off each other...

`seems like we have identical problems....free rev is fine, under load no go... (I have a datalog in my thread...see if its what ur seeing as well)
GL

Guys I basically resolved this issue on my car...I think the rest is just tuning as its really rich throughout and is bogging some..but a BIG improvement..


Aflac, if u got the EBC mod done by Scott check the Boost Kpa Targets table...I inputted the exact table that were in the instructions & it was 100 for the 1st 2 columns then 30 for the rest. I just copied it since I didnt know what it meant...After going back to my original MSQ & tables (i was plannign around with it) I also put all the values at 100 and it made a big difference...No longer feels like it CANT go faster/higher rpm..just feels like its real rich (afr confirms) and being held back...

Also make sure the Boost Protection is set to something reasonable that wont hold you back for now...I used 16psi..

**OF COURSE u should listen to Scott and make sure doign any of this wont mess anything up, I took a short drive and made a BIG difference...I did not/would not drive hard, or long...Just enough to see if it feels better..

GL man!!

I will check on this once i get home from campus. HUGE congratulations on you finding your problem!! :beer:

Thanks man!
Hope it works!!...I'm really anxious to see if this helps!! Please post the resuts...(Advanced-->Boost Kpa Targets Table 1)

I dunno where the option is to select whether to use table1 or table2 (like w/ VE & spark), but should be set to 1 on default i guess...

GL..waiting to see result post!

Finally got home from studying and I uploaded a picture of my spark and boostkpa. Please have a look and tell me if something is amidst.


Attachment 214491


Attachment 214492

I don't really understand why you guys are even bothering with the boost KPA tables. We're not even using closed loop boost control so that table is irrelevant.
You should be messing with the duty cycle tables.
Even if you were trying to tune your KPa table, why would you set it all to 70 instead of the actual boost levels you wanted to see that that rpm/tps?

I don't touch the kpa table, im just posting what it was preloaded with as requested by Tony.

Attached a picture of the current preloaded boost duty target table. What do you think?

Attachment 214490

Looks like a normal EBC table to me. At least there is nothing wrong with it. Keeping the wastegate closed longer will help it spool faster. Keeping it at 100% duty until you reach desired boost, then drop it to the appropriate duty to hold that desired boost.

It has to be something on my part since I recieved back the MS from Scott that was tested on a 94 boosted miata and it revved fine.:slap::slap:



Installation pictures:
Attachment 214482
Attachment 214483
Attachment 214484
Attachment 214485
Attachment 214486
Attachment 214487
Attachment 214488

Here's what I have on my instructions....which is why I started messing with that table...Dunno who's wrong/right, just wanna know what I shoul dbe doing if I am wrong...

"Tuning the EBC:

Go to advanced > Boost kPa targets

This is how we tune boost. 100 = full boost (unlimited) 0 = no boost (wastegate)

Start with something low and work up from here."


---It wont let me copy the pic of the table, but the 1st 2 bins (1000/2000rpm) are 100 all the way up, and the rest are at 30...