Miata Turbo Forum - Boost cars, acquire cats. - 100 hours, still slightly worse than a stock ecu.

- MEGAsquirt (https://www.miataturbo.net/megasquirt-18/)

- - 100 hours, still slightly worse than a stock ecu. (https://www.miataturbo.net/megasquirt-18/100-hours-still-slightly-worse-than-stock-ecu-78866/)

100 hours, still slightly worse than a stock ecu.

I have quite a bit of time invested into this thing now and it still runs like dog shit. I have what I think is a pretty solid fuel, timing and AFR map. It refuses to idle any lower than 45 kpa, shakes and wants to self destruct at anything leaner than 14.5 afr at idle and has an off the chart lean spike when you get into the throttle( slow or fast, doesn't matter either way its going to 19 AFR for a split second). Why does there seem to be so many different versions of tunerstudio?? every time I search for help in threads, someone refers to a chart or setting that i do not have. Most recently is AE wizard. who is this guy and why don't I have access to him? Does anyone near Virginia want to tune this for me plea$$$e? Attachment 111715

What MS do you have? Have you paid for TS? That's when all the options unlock.

Also, if you have an older MS, such as an MS1, you'll rarely see your version of TS posted. Unless I'm posting. MSII and MSIII have completely different menus.

msextra says to start with a large value in the accel bins. I don't have accel bins and what is a large value anyway? 1,10, or 10,000??? I just have a map and a few inputs below.
kpa threashold,time, pulse width and taper time.

yes, paid version. diypnp. ms2extra?

A lot of the time its not an issue of being locked or unlocked. I just don't have. such as mr. AE wizard, or these enrich bins I read about. These small differences are making learning this thing just insane.

There's a little box with "..." in it. Click it and you'll open up your table.

your right. I wonder how many times I have missed that in other sections. thanks!
I cant wait to see how many negative points I get for this...Whats the record for negative props and can they ever be reversed?

That's why we're here.

That'll be $19.99.

You need a game plan. Do things in order. If you jump around trying to tune different things based on what you seen others do in other threads and don't do things in order you're gonna have a real bad time.

Been there, done that.

Start with the basics - a solid base map. make sure your req_fuel is spot on and all sensors and thresholds are calibrated and good. Then work on a solid, no-nonsense idle. Then dial in solid VE map cells that are just stationary and revving. Make a solid spark table and leave it pretty much alone. That will be almost completely the last thing you tweak. Focus on a very solid and smooth ve table and make sure your afr targets are good. No spikes, no garbage. You'll have to do a lot of autotuning for this. Then when map is nice and smooth/solid make sure your warmup trims and temp corrections are good. note the temps you're tuning the base map with so that later you can taper up/down for temp changes hwen it gets colder and hotter. Then work on your ae and eae enrichments. MSextra is a very good source of info on that, as well as diyautotune writeups, and of course this place. Between the three, thats where I got all my MS knowledge, and I've been able to easily appy it to pretty much every version of MS I've worked with so far: mspnp, diypnp, ms2e, ms3, etc.

Of course lots of people helped me along the way, but that was for the more advanced stuff, not for general tuning.

Hope that helps.

(PS: sorry can't look at your map I'm on a computer that doesn't have TS and can't download it right now)

If it gets rid of this lean spike, I'll gladly pay it.

lean spike is your accel enrichments most likely

Quote:

Originally Posted by 18psi (Post 1127971)

You need a game plan. Do things in order. If you jump around trying to tune different things based on what you seen others do in other threads and don't do things in order you're gonna have a real bad time.

Been there, done that.

Start with the basics - a solid base map. make sure your req_fuel is spot on and all sensors and thresholds are calibrated and good. Then work on a solid, no-nonsense idle. Then dial in solid VE mapo cells that are just stationary and revving. Make a solid spark table and leave it pretty much alone. That will be almost completely the last thing you tweak. Focus on a very solid and smooth ve table and make sure your afr targets are good. No spikes, no garbage. You'll have to do a lot of autotuning for this. Then when map is nice and smooth/solid make sure your warmup trims and temp corrections are good. note the temps you're tuning the base map with so that later you can taper up/down for temp changes hwen it gets colder and hotter. Then work on your ae and eae enrichments. MSextra is a very good source of info on that, as well as diyautotune writeups, and of course this place. Between the three, thats where I got all my MS knowledge, and I've been able to easily appy it to pretty much every version of MS I've worked with so far: mspnp, diypnp, ms2e, ms3, etc.

Of course lots of people helped me along the way, but that was for the more advanced stuff, not for general tuning.

Hope that helps.

(PS: sorry can't look at your map I'm on a computer that doesn't have TS and can't download it right now)

OK thanks. That was my next question, are my tables bad enough that I should just scrap the whole thing and start over? I mean, it follows the AFR targets well and doesn't ping. Just idles like hell and spikes. I'm going to go through the whole idle cell adjustment deal again tomorrow. And then go from there I guess.

I'll check your map when I'm on my laptop. What are you trying to get it to idle at afr wise? what injectors do you have? what is the timing at idle? surrounding cells? have you done the iacv test to determine min and max values for it?

Quote:

Originally Posted by 18psi (Post 1127974)

lean spike is your accel enrichments most likely

I found that no matter how high I adjusted the AE it always spikes. But after the spike, the adjustment made a difference. Does that make sense? Like after the spike I could get 10,11,12 AFR but only after the swing to 22 first. It seemed like I was able to get it down a bit with the ergo control. I have it set now at 15% authority, 3% steps. this seemed like a band aid though.

Quote:

Originally Posted by 18psi (Post 1127977)

Shooting for 14afr for now, although it seems like the engine prefers the 13 range. Its smoother but almost kills me in my driveway. 14 deg. Yes to the idle valve test. This was weird too. Per the instructions I found, It should stop making a difference below 20 something but I can keep going down until the engine dies. So I went with " acceptably low"and ended up around 32-68. But then for reasons I can't remember I went back to open loop. I have no ac or power steering.

13.5-14 is the best you'll get on stock injectors

Quote:

Originally Posted by 18psi (Post 1127989)

13.5-14 is the best you'll get on stock injectors

This explains why it feels like junk at 14.5-7. Thanks guys.

Quote:

Originally Posted by ryansmoneypit (Post 1128033)

This explains why it feels like junk at 14.5-7. Thanks guys.

I've been able to idle stock injectors at 14.7-15 :hsugh:

Well mine feels like its going to self destruct at 14.7.
I just got a smooth steady idle at 13.2 this morning.