kiladonut

iTrader: (1)

Hey guys looking for some help. Picked up a turbo'd 2000 miata (18psi built the car) that I am trying to get to start and idle properly on 93. Anyways I was wondering if there were any base maps floating around I could start with.

Car is running megasquirt DIYPNP with ms2-extra firmware, ID1000s, and 9.1:1.

18psi

iTrader: (76)

I think I still have the maps for it somewhere.
Didn't Bryan give you all the maps?

aaronc7

iTrader: (8)

Did you just get the DIYPNP made/put on? If it was already on the car the tune should still be on there?

http://www.diyautotune.com/diypnp/ap...0-18bp-mt.html

just change the req_fuel to 3.0 or so to account for the 1000cc injectors. it should fire up fine.

kiladonut

iTrader: (1)

The car does start, although it takes a while of cranking and playing with the throttle before it kicks.

After getting it to fire, the car idle surges pretty good. Playing with some settings got the idle stable, but the car was more difficult to start after (I think it actually wouldn't start at all) and the exhaust had a "popping" note to it as if it were lean (AFs were fine at ~15.0.) With the idle surging the way it is, AFs sometimes fluctuate more than a point in either direction at idle. I'm trying to get a stable baseline before tweaking the WOT stuff.

I'll take a look when I get home.

aaronc7

iTrader: (8)

post .msq/tune file

blaen99

iTrader: (6)

Keeping an eye on this thread - I have identical problems to the OP, although I've (mostly) programmed out rpm oscillation. Happened with RX7 550ccs and with EV14's.

18psi

iTrader: (76)

its tuning related for sure since it idled and started perfectly when I sold it.
I even posted vids lol, I think they're still somewhere on here

kiladonut

iTrader: (1)

Here's the tune file

aaronc7

iTrader: (8)

Will take a look when I get on comp tonight.

aaronc7

iTrader: (8)

VE values of around 100 in idle areas seems way wrong. Mine are like 45-55.

Also the cranking pulse, and ASE enrichements seem way high. I never had to tweak mine away from the DIY 99-00 basemap (that I linked) and never had cold or hot start issues, so I never touched em.

Change your idle mode to warmup PWM for now so you don't have the PID control system kicking in and possibly making ---- worse. Use the warmup PWM table to set the idle valve values you want, and then manually edit VE, timing tables etc until you get a solid idle. then turn on PID closed loop and tune the PID values.

18psi

iTrader: (76)

I didn't get a chance to look at the map yet, but I suspect that Bryan simply scaled down the e85 map to get it to run on 93 and didn't really re-tune it.

In which case you need to start over and scrap most of the settings on there

kiladonut

iTrader: (1)

Issues - after tweaking a base map for the ID1000's, the car would not start at all. After upping the injector open time significantly, the car started, idled a bit (although popping,) backfiring slightly, and we shut it down.

We then loaded up the old map, and the car would start, but then die quickly. We tried several other maps that have all at least allowed the car to idle, and none will keep the car going, it keeps dying. If you keep feathering the throttle, it tries to stay alive but the wideband pegs lean.

We weren't sure if the firmware was causing issues because when we tried to load a map at one point, it loaded a lot of random numbers into the ignition timing table (i.e. 2888* for some values.) I uninstalled TS, reinstalled it, put another base map in with the only change being the injector from factory down to 3, and the car would not start. We uploaded another old tune, which now at least had the right parameters, but the car has the same issues. I don't know if maybe it's something mechanical from adjusting the injector open time or not, but nothing else was changed, the plugs are dark from running rich but nowhere near enough to cause the car to not start.

Not sure where to go from here.

Thanks

Braineack

iTrader: (62)

you guys and just fooling around with no idea what youre doing with vitial parameters essential to running a car and keeping it healthy makes me so sad, especially considering how freaking easy this is.


when you upgrade to EV14 injectors, you must alter the fuel table as well as the req_fuel and the dead times.

since the injectors can cycle so fast and spray fuel so well, youll have to increase the VE% significantly at idle in order to keep the car running and supply enough gas.


But where did you start your map from at all? a lot of your settings from the attached msq are just off...like the cranking pulse and the accel stuff, the idle frequency. but considering what it seems youve been autotune at looking at the fuel map, im thinking you have WAY too much fuel at idle...what do your AFRs say?

kiladonut

iTrader: (1)

The only adjustment made was to deadtime. The other settings were not adjusted, so I don't know where this comment comes from.

The VE map provided by the PO had values around ~100 around at idle, and allowed the car to idle. The stock VE map (well, base map in general) would not allow the car to start with the lesser values.

The maps I have are the maps given by the PO and 18psi. The most recent one is the one I posted earlier. The car previously ran on this, although it idle surged and cranked for a while before firing up.

The base map is the one for sequential provided by aaronc7. The only change made was for req_fuel as mentioned, and the car would not start.

The AFRs when the car starts look normal, but after a few seconds the car begins to die and the wideband pegs lean.

The confusing part is why the car will no longer start on the same map it ran on earlier today, when no changes were made to that map. After no success with the base map/req_fuel adjustments, we reverted to the earlier tune which now won't keep the car running.

kiladonut

iTrader: (1)

So, after some time, we came back to try again. I loaded one of the PO's maps, and the car started and idled, albeit a little lean. I let it sit for a bit, turned it off, and then attempted to load the most recent tune (the one posted in this thread.) After loading it, I was going through to verify that the changes took, and all of a sudden the status bar started saying "Burned all data," the dashboard went nuts, and when I opened up the AFR table this is what I saw. This is pretty much the same thing as what I mentioned in post 12. I did not change anything during this, only viewing values.

I don't know if maybe the issues I'm having are related to the MS hardware itself?

Screenshot attached.

Braineack

iTrader: (62)

id play it safe and reflash the firmware, sounds like things are getting corrupted, maybe a good time to try the lastest gslender code.

aaronc7

iTrader: (8)

+1

at least upgrade to the latest 3.2.1 release FW

kiladonut

iTrader: (1)

Well, now I can't even connect to the unit. I've tried a Windows laptop and my Mac, and I can't establish a connection to the ECU. Keeps saying "No device found. Check your connections"

18psi

iTrader: (76)

I didn't supply you with any maps. The ones Bryan gave you are severely different from what the car ran when I had it.
Unfortunately the only maps I have are e85 maps, no pump gas maps.
Looks like you have some software/firmware issues. Reload both, and start with a fresh map

kiladonut

iTrader: (1)

Sorry, it was my interpretation that the folders of logs were some of yours, and then his.

Regardless, I can't connect to the ECU at all at this point. Going to investigate further tomorrow.