|
Post by Fizbne on Aug 16, 2017 23:05:59 GMT
Okay, I think it was Heat Soak, watched the temp go down with the needle. How did I watch the IAT temp? I GOT MUH LAPTOPPP. TunerStudio with a licence is now payed for and spent an hour and a half auto-tuning. So far I have this: VE Table Ignition Table AFR's at cruise are showing steady on my AFR gauge, and it's now driving smooth and at much better AFRness around town too. Not too rich, not too lean. Nice and stoich yeaaah gurl. Ignition table has supposedly been tried and tested among a few MX5 owners, so I'll leave that as is for now until I start to understand a bit more about what / how to do. The only other problem I have yet to get my head around is WUE / Warm Up Enrichment, if you will. On a cold-ish start (it's been nice and warm lately so morning / after work starts have been fairly easy), the car will run at about 12ish AFR (ASE / After Start Enrichment working as is) for 30 seconds as per the settings. After that, it'll lean riiiiight out to 17+. Here's a screencap of my settings if anyone can give me a hand with this? I'll continue reading and see how I go. Thanks guuuuys.
|
|
|
Post by joeytalent on Aug 16, 2017 23:48:44 GMT
Okay, I think it was Heat Soak, watched the temp go down with the needle. How did I watch the IAT temp? I GOT MUH LAPTOPPP. TunerStudio with a licence is now payed for and spent an hour and a half auto-tuning. So far I have this: VE Table Ignition Table AFR's at cruise are showing steady on my AFR gauge, and it's now driving smooth and at much better AFRness around town too. Not too rich, not too lean. Nice and stoich yeaaah gurl. Ignition table has supposedly been tried and tested among a few MX5 owners, so I'll leave that as is for now until I start to understand a bit more about what / how to do. The only other problem I have yet to get my head around is WUE / Warm Up Enrichment, if you will. On a cold-ish start (it's been nice and warm lately so morning / after work starts have been fairly easy), the car will run at about 12ish AFR (ASE / After Start Enrichment working as is) for 30 seconds as per the settings. After that, it'll lean riiiiight out to 17+. Here's a screencap of my settings if anyone can give me a hand with this? I'll continue reading and see how I go. Thanks guuuuys. Sounds like you're on the right path - ASE is kicking in, but the WUE isn't. Your WUE is really simple - it's just coolant temperature vs (fuel) enrichment . If you're super lean when you start the engine from cold, make a note of the temperature at start (probably close to the air temp) and bump up the enrichment around that value. That should bump more fuel in and bring your AFR closer to 14.7. Sadly its a case of trial and error, as you can't magically make your coolant cold. I believe there is a WUE tuning wizard in Tunerstudio, but it was pretty prarrie canoe. Your VE table looks like a lot of it hasn't been touched at low kPa - you're probably not going to hit those values that often. I would smooth them out a bit more if you're not hitting them with VEAL.
|
|
|
Post by Fizbne on Aug 17, 2017 7:30:56 GMT
I had a go at the WUE this morning, coolant temp was about 38C so in that box I entered "150" in it, sure enough it enriched the mixture from a ghastly 18AFR to a respectable 14.5. Better, but not rich enough for WUE in my opinion, regardless, it just eventually leaned out by itself back to about 17+.
Not sure what else I can do really.
I tried the WUE Autotune, which was quite frankly utterly useless.
Kinda stumped here - But I'll have a gander on the interwebs and see if anyone else has had similar issues.
Oh, startup this morning went rather painless so that's all good!
|
|
|
Post by martiny on Aug 17, 2017 9:12:05 GMT
I had a go at the WUE this morning, coolant temp was about 38C so in that box I entered "150" in it, sure enough it enriched the mixture from a ghastly 18AFR to a respectable 14.5. Better, but not rich enough for WUE in my opinion, regardless, it just eventually leaned out by itself back to about 17+ ... Maybe a silly question but could that be because you only increased WUE at 38°? As the coolant temp increased towards 54°, the WUE would drop from 150 (50% extra) to 102 (only 2% extra). Are you using closed loop fuel control? I kinda assume you're open loop if AFRs can drift so far from your target, but it's also possible the AFR correction is on but hasn't been given enough authoritaaay to add enough fuel to get it to its target.
|
|
|
Post by Fizbne on Aug 17, 2017 10:57:58 GMT
I had a go at the WUE this morning, coolant temp was about 38C so in that box I entered "150" in it, sure enough it enriched the mixture from a ghastly 18AFR to a respectable 14.5. Better, but not rich enough for WUE in my opinion, regardless, it just eventually leaned out by itself back to about 17+ ... Maybe a silly question but could that be because you only increased WUE at 38°? As the coolant temp increased towards 54°, the WUE would drop from 150 (50% extra) to 102 (only 2% extra). Are you using closed loop fuel control? I kinda assume you're open loop if AFRs can drift so far from your target, but it's also possible the AFR correction is on but hasn't been given enough authoritaaay to add enough fuel to get it to its target. Wasn't a silly question at all. Early morning and no coffee meant I was being a bit special and didn't really take into consideration that coolant temps do rise aha. On break, I plugged in, started the car and upp'ed the temperature across the range, but I feel that this isn't the "right" way to do this (see pic below). If I'm correct, I'm dumping in 70% extra fuel(?!) as compared to a warm idle. Is that right? Is the stock ECU really dumping in almost double the fuel load on warmup? I remember when I had an AFR Gauge simulating narrowband to the Stock ECU in my old car, rich idle was pretty rich like 11's so I'd assume that'll be equivalent to a value of 200%?, jeez. One thing upping the fuel on WUE doesn't help / change (obviously) is the fact that cold / fast idle SPEED hasn't changed. It's still trying to idle at 850RPM as opposed to a healthy and normal 1400/1500RPM. I'm guessing this has to with with a change in the Idle Control / PWM settings? I've snapped some pictures below of what my current Idle Control Settings are. FYI I haven't touched these at all. Just left them as is for now. Apologies for super potato phone noob giant screen cap. Hmm. Okay I guess I am in Closed Loop mode. Idk wtf is going on then. Any ideas? There MUST be something else I'm missing here...
|
|
|
Post by Fizbne on Aug 17, 2017 11:35:48 GMT
Another thing to mention: When I use Autotune in Warmup Enrichment mode - It wants to revert back to my original settings...
Thus making my idle SUPER lean on warm-up again
So it seems, that the ECU seems to want to go back to these settings for some reason. I guess that means something is wrong somewhere as I guess it's assuming it's hitting the right AFR's for warmup.
In that case, is there a Target Cold / Fast Warmup AFR table thing?
|
|
|
Post by joeytalent on Aug 17, 2017 12:48:44 GMT
|
|
|
Post by Fizbne on Aug 17, 2017 13:51:22 GMT
Hmm... Fast Idle (lower) temp is 54 Celcius... I think that may be where my problem lies. I'll hook it up to the car after work and change that to like 0 Celcius. See how I go from there.
|
|
|
Post by martiny on Aug 17, 2017 14:23:22 GMT
One thing: your final value in the enrichment column, at 71°C, is 105 but the final value should always be 100. It doesn't know the temperature at which WUE should drop to 0% unless you tell it. As it stands it'll always add 5% WUE even when the engine's fully warmed up.
|
|
|
Post by Fizbne on Aug 17, 2017 14:40:09 GMT
Ahhhhhh, thanks for that.
I assumed it just drops to 0% after the last setting. I'll sort that out before I start.
|
|
|
Post by joeytalent on Aug 17, 2017 14:50:46 GMT
Stolen from another site for tuning your RPM on warmup:
1. Set "When to use PWM idle" to "Warmup Only."
2. Your "Idle duty at lower temp (dc)" and "Idle duty at upper temp (dc)" will now be un-grayed. Leave your existing setting for lower temp but change your setting for upper temp to 19 (to match your "Minimum (dc)").
3. Change your "*Fast Idle (lower) Temp (F)" from 54 to 130. Remember, it's °F, not °C.
4. Change your "*Slow Idle (upper) Temp (F)" from 71 to 160. Same comment about units.
5. What the squirt will now do is slowly change the idle control valve duty cycle from 27 when at or below 130°F coolant temperature to 19 when at or above 160°F coolant temperature. The dc change will be slow and steady without oscillations (you are now running open loop). Setup your gauges so you can monitor coolant temperature and dc to confirm proper operation. If everything is correct, the higher dc will give more RPM.
6. Once you're stabilized and warmed-up, with all accessories, lights and fans off (minimum alternator load), you can turn the idle screw in to achieve the desired idle RPM.
7. Now you can return to "Closed loop only" and start fiddling with those adjustments. However, if you're not running AC, you might consider just staying in "Warmup only." Many users find this mode to be perfectly satisfactory.
Your idle temp settings appear to be greyed out right now, so I doubt changing them will do anything.
|
|
|
Post by Fizbne on Aug 17, 2017 15:48:07 GMT
Ohhhhh. Have you got a link to the page please?
I think I'll read more about DC (Duty Cycle (?)) before I start to follow the instructions. I'd rather get a decent understanding of what I'm doing before I start punching numbers in willy nilly.
Thanks though, it sorta makes sense. I'm just slow and need to read things about 50 times before it clicks.
|
|
|
Post by joeytalent on Aug 17, 2017 18:12:10 GMT
Ohhhhh. Have you got a link to the page please? I think I'll read more about DC (Duty Cycle (?)) before I start to follow the instructions. I'd rather get a decent understanding of what I'm doing before I start punching numbers in willy nilly. Thanks though, it sorta makes sense. I'm just slow and need to read things about 50 times before it clicks. www.miataturbo.net/megasquirt-18/idle-seems-reverse-55493/
|
|
|
Post by Fizbne on Aug 18, 2017 7:01:53 GMT
Thanks.
This mornings drive in was interesting.
Cruise is like pretty lean again, as compared to last nights cruise AFR's which was perrrrrrrrfect.
I guess it's pretty cold out compared to yesterday, maybe that's something to do with it? Did some autotuning to help balance things, buuuuut I kinda feel like I've messed up somewhere. Oops.
Also, I found another issue which may have something to do with idle control.
On the display, I replaced the TPS gauge with something else, I can't remember. Was curious about something and the gauge was showing 76~% while closed, and with my foot to the floor was showing 20~%.
So, like, that's WRONG. Oops.
Will have to change that on break today or something.
|
|
|
Post by joeytalent on Aug 18, 2017 13:34:13 GMT
Have you set the barometric correction?
|
|