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So I am working on stabilizing the idle and it seems to idle fine except for two issues:
1. When my fans kick on the idle stumbles and runs rough
2. When i blip the accelerator or come to a stop it struggles to idle normally, stumbles, runs rough, hunts for the target idle
I am attaching my log and tune file, any insights or help would be greatly appreciated
So i cant look at your tune until i get off work and ill double check this when i get home on what i did.
The biggest thing is you need to keep tuning. Do some searching and start to tune Closed Loop idle it works much better than open loop. You will have to set your idle valve duty table if you havent yet. Also for the fan if i recall i used the ac idle up circuit to compensate for the voltage drop.
Again ill double check your tune and mine for what i did when i get home.
Awesome thanks a lot, yes I am modifying the VE tables to hit afr, i am about there. I am wondering if the ebay BOV is hosed, it whistles after the BOV hits. I haven’t tuned the idle duty cycle yet, will look into thanks for the tip. 👍
Tell me more about these 1300cc injectors, because you appear to be running very rich and when youre blipping then throttle youre going pig rich.
I couldnt open your tune, but it looks like from the log you have a big jump in ignition advance around 1700 rpm at low load. Can you post a screenshot of your maps instead? Also, your idle settings, too?
Injector dynamics 1300 cc the new x2 version ones. I used the sheet from the website to setup the injectors, the VE table hasnt been tuned. i have only driven around the block, I know they are excessively rich.
Just from looking at the table above I garentee you're going so rich it dies all the 99 cells above and next to where you idle need to drop a ton and blend better with the 75. I'd change them to 80 or so to start
I have not done the IACV test for min and max, I know I fail :(
Just as FYI, it is running at 67psid fuel pressure after installing a DW300, i did use this from ID website to figure out the deadtimes and injector characteristics
Have you had this car running well on Megasquirt before? Do you have the full version of TunerStudio with VE Analyze Live? I don't get why you're asking for help on why it runs poorly, then you say you haven't tuned the VE map yet... tune it!
I thought that's what I was doing, working on idle first then when that works I'll be working with VEAL to tune cruising, boost, etc. Yes I have a full copy of TS. I am asking for assistance because I am learning. If asking for help while learning is wrong then I apologize.
This is the initial install of the TSE kit and MS. It was previously running on stock ECU and injectors.
You're all good for asking questions. Try what I told you and tune your iac value. There's lots of write ups on how so I'll let you search for that. Then report back with results
I thought that's what I was doing, working on idle first then when that works I'll be working with VEAL to tune cruising, boost, etc. Yes I have a full copy of TS. I am asking for assistance because I am learning. If asking for help while learning is wrong then I apologize.
This is the initial install of the TSE kit and MS. It was previously running on stock ECU and injectors.
The tune you posted shows that zero tuning has been done, not sure where that map even came from. If I were you, I would put the stock injectors back in, run it without the turbo, use a Miata basemap, and learn to tune before you mess anything up. I sure would not want to learn how to tune with a boosted motor.
Even if you don't take that advice, start with a Miata base map, then correct for the new injectors. I haven't yet looked at what Boogie provided you, but hopefully that's what it is. If you open up the 3d view of the VE table, you should see no sharp steps, it should flow nicely upwards when you go up and to the right. All VE tuning also needs done at steady state, you must slowly ease into the pedal, get the engine into a new cell on the VE map (which can be seen with the dot that appears on the map), and adjust VE until AFR matches your target, then proceed to the next cell. After the VE map is fully tuned, then you'll work on acceleration enrichment, which will handle quick spikes of the throttle.
Even if you don't take that advice, start with a Miata base map, then correct for the new injectors. I haven't yet looked at what Boogie provided you, but hopefully that's what it is. If you open up the 3d view of the VE table, you should see no sharp steps, it should flow nicely upwards when you go up and to the right. All VE tuning also needs done at steady state, you must slowly ease into the pedal, get the engine into a new cell on the VE map (which can be seen with the dot that appears on the map), and adjust VE until AFR matches your target, then proceed to the next cell. After the VE map is fully tuned, then you'll work on acceleration enrichment, which will handle quick spikes of the throttle.
I wasnt sure what all had been done and how the ECU is wired up, so all I did was change the VE and AFR maps, plus tweaked the close loop idle settings.
The scaling on the ignition map needs to be changed and the whole map reworked, but it didnt look very engine-explod-y to me.
But yes, I bet there is a good basemap for this engine and ECU. That would be a good place to start.
Either way. Lots of work and learning ahead for you, OP. Best of luck and be careful.
EDIT:
Took another quick look. Youll want to disable "Idle VE" for now (Thats under "Startup/Idle"). I would also go ahead and turn on overrun fuel cut, maybe just bump the RPM up a bit for now.
Last edited by Full_Tilt_Boogie; 03-23-2018 at 08:19 PM.
03-22-2018 | 02:56 PM
idles fine until i blip the accelerator then dies
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