Miata Turbo Forum - Boost cars, acquire cats. - Idle issue with MS2 unit, Log and Msq inside.

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- - Idle issue with MS2 unit, Log and Msq inside. (https://www.miataturbo.net/megasquirt-18/idle-issue-ms2-unit-log-msq-inside-53894/)

Quote:

Originally Posted by Braineack (Post 662910)

If you cant get the idle below 2700RPM you have a bigger issue.

change it to warm up mode only and force the valve to like 10%DC...what is your idle speed?

if above 1200RPM, then fix your vacuum leak.

Crank to Taper right?

Quote:

Originally Posted by Braineack (Post 663011)

The issue doesn't go away if you unplug the IACV. You've just masked it with a shitty work around.

Go to idle valve test mode, and force the valve at 0% DC. Then gradually increase the PWM%, do the RPMS increase or decrease? What is the range in which the valve operates? and what are the RPM points?

For example, my valve operates between 20-70%DC, anything above and below have no reactions. This can allow it to go to 700-2000RPM or so.

I will do this one next.

Quote:

Originally Posted by Braineack (Post 663015)

If I look at your first log, your idle valve is locked at 23%DC. Which is fairly shut. It doesn't move. The idle going up and down is in direct relation to your tune...specifically your Fueling.

Look how your pulse width dumps in a shit ton of fuel, then none at all. That's what's causing the oscillation, NOT the idle valve.

Loading DIY's stock map now

Quote:

Originally Posted by Braineack (Post 663020)

tune out the oscillation with the fuel map...

looking at your first map posted. If you look at your idle valve settings, the idle valve works within a range of 6% to 23%, so it's acutally locked open on your first log at 23%...so that's why you have so much RPMs.

go to idle settings, change it to PWM warmup...then change the PWM table and force all the numbers to 6% and see how it idles. Tune your fuel.

you should also go into general settings, lags, and lower the TPS lag threshold value, this will smooth out your TPS signal...it's pretty dirty on that log and might be triggering the fuel to be cut like it is.

I will change the PWM table now as directed too

Test on PM Warmup with minor changes:
http://www.fileden.com/files/2009/6/26/2490169//stock fuel map.msl

Stock Fuel Map Data Log with changes:
http://www.fileden.com/files/2009/6/26/2490169//stock fuel map.msl

Current Msq:
http://www.fileden.com/files/2009/6/...9_12.32.00.msq

Tried disconnecting the iac jumped a little then went straight to 4400rpm, oh i forgot to update a few things dang it.

Anyway datalog:
http://www.fileden.com/files/2009/6/...//disconnected iac.msl

are you using tuner studio? your firmware is never attached to your MSQ.

yes I am using the latest firmware sorry its not attaching.

Oh dude, there's like major problems with your map. first off...look at the log, your spark angle is over 60°...it's doubled what the map reads.

you're using percent baro as your igniton load algorithm.

it should be changed to speed density, and the secondary disabled (under more engine constants). Having spark advanced so greatly will easily increase engine speed like youre seeing.

ill keep updating what problems I see... hang tight.

I will keep refreshing, and making changes I caught that too I have no idea why that changed it obviously is my fault but I just changed it back and made sure both said speed density now.

I am going to load default tables again and go from there.

New data log:
http://www.fileden.com/files/2009/6/26/2490169//Base map I think.msl

turn off incorporate AFRtarget.

your AFR targets table is a mess. Are you using Narrowband or AEM or something? could be my conversion.

lower limit of baro should be 90kPa

okay, see what changing that does... turn OFF secondary ignition load alg.

Checking now and turning it off, that last data log shows everything with how you said above I changed it back from what it turned into. (I swear I don't remembering changing that but oh well).

I am using a wideband, LC1

that's probably what the issue was...your timing is double what it should be...im sure the ignition algorithms being what they were fubared you...timing should be around 12° at idle at 850-900RPM. Even at 1500RPM, you only need that much. Not 60°...

alright all changes made, stock maps starting up now... hope this works.

Data Log and MSQ coming.

look at your last log you just posted. the spark angle is indicating over 60° of timing.

your VE spark map doesn't go over 40°. The log looks to be doubled what your map is set to. I'm betting since you had percent baro selected, it was doing something odd with the timing table.

Trying to idle at 60° spark angle is insane potentially damaging. it will speed up your motor plenty good... it's not a number you ever want to see your spark angle set to.

Even jumping from 10° to 20° at idle on my car can increase my engine speed a few hundred RPM.

Alright I am missing something here. I have changed the tables with others to no avail so I am not doing the right this I am not changing the right area or this setting was a bad one off the tune I am using.

I am going to DL DIY tunes again make the spark changes and try again because something is wrong with this map and changing all 3 tables to what I thought were stocks did nothing at all.

I never told you to touch any table. just a few settings.

your spark table looks good, however, your bad settings are causing crazy high ridiculous spark angles. and this is causing your idle problems.

all you need to do is change your primary ignition algorithm back to speed density. disable the second. and then disable include AFRtargets.

fix your AFR targets table later.

changing those settings should fix your car. you must have done this when fucking around, because your first log posted here looks okay, max timing of 28°.

.... well I feel sheepish I have been messing with the ignition table, and afr table.

Yeah... let me go try this again.

I made all the changes found under:
Basic Settings -> More Engine Constants
that was the last log I believe.

Since my table does not have it going over 60 I am not sure where its getting such a signal to do so any longer I thats why i thought something was wrong with my Ignition table was what you meant (My fault sorry).

Where should I be looking to make changes then?

i think that's it. i just went through your entire msq page by page and listed off the issues I saw.

fixing those settings coupled with keeping the idle valve at a lower dc% should have better results.

Also just made a donation through the site thingy since I was not sure where else to send it, as promised.

The help is great even if I am overlooking something I shouldn't be I appreciate your time and assistance.

Alright I am going to upload my current Msq, I checked everything under:
Basic Settings -> More Engine Constants

So this should be right then?

I will do a data log as soon as I load it up, I pulled the car up to the apartment out of the garage since most everyone is at work. Give it a shot here since its closer.

Current msq:
http://www.fileden.com/files/2009/6/...169//Hopefully Right.msq