ridethecliche

iTrader: (2)

Hm. What exactly is kickback? I advanced timing for the stock injectors, but the mustang injectors didn't really like starting up today. I have to play with a few things, but I wonder if they just don't like the timing.

dawson128

While cranking, it's basically detonation, except at cranking RPM the detonation has enough power to stop the crank or even knock it in the opposite direction which I don't assume is super great on my starter

StanTheMan

Fair point. Most of us can perhaps be accused of that somewhere while tuning. I suppose if you had the wrong starting number with the original injectors its a good chance you have to change that. I don't recall what I did exactly when I installed the Rx8 injectors. I do know I did go back at one stage there for a while & played around with it. I don't recall if that was before or after. I also changed to flex fuel around the same time. If I'm really unsure I usually leave a note to what it was on the setting. If it all goes pair shape I then refer to those notes.or just revert to a previous tune. 'lMy Flex fuel cranking PW is a bit different to my Premium fuel one.I haven't reverted back to premium gas to find out if it makes a difference.

Braineack

iTrader: (62)

this could be fault of a lot of things... too much fuel during cranking can do this, spark outputs being incorrect can do it, etc.

dawson128

You may have to elaborate on these "lots of things." Car refused to start this morning in the 45 degree weather. Was getting kickback as usual so set timing to 0 degrees advance. Still kicking back. Played with cranking PW, moved it up and down but didn't seem to affect it starting too much because it would just keep kicking back.. WTF!!! Had to drive a CRV to school today. The Miata is my daily so I can't really have it refusing to start if it gets a little chilly.

I took a datalog of it but I cant upload it right now because my school turned their WiFi off. Will upload it ASAP along with my tune or at least the one I have saved and revert back to. Thinking about just pulling the MS and putting the stock ECU back until I figure out wtf I'm doing :(

Braineack

iTrader: (62)

kickback is not normal, have you had it since initial install, or since changes hundreds of settings?

the cranking advance is not your key to victory here -- i think my maps have it something like 18°, not sure why you keep retarding it.

dawson128

​​​​​​IIRC it's been doing it since day 1. I've been retarding it hoping it will make any kind of difference. Trying to remove a possible cause.

I will probably try and verify my spark timing again today if I can start the car when it warms up..

dawson128

Since I still can't upload my datalog or tune, I've got a question I want to confirm. Occasionally after this umm.. kickback, I get an error message on my laptop and I have to power cycle the megasquirt to get it to work again. I'm guessing​ this is from the CAS moving backwards when it kicks, giving the MS a reading that it doesn't know how to deal with?

ridethecliche

iTrader: (2)

Does the car start in flood clear mode? I.e. with the throttle pressed all the way down at startup?

And just to confirm, it had no issues starting up on the stock ECU right? Can you post a log of the behavior and your current tune?

dawson128

The only issue it had on the stock ECU was difficulty with hot starts on occasion which I'm not the only one with that issue. As of this morning it would not try to start in flood clear mode. Here is a data log and tune. However the fuel settings at cranking in the data log may have been a bit different than in my tune (was moving the curve to try and get it to start), but everything else should match.

ridethecliche

iTrader: (2)

Is your tune currently brain's basemap on your ecu or your basemap modified using brain's map as a guide?

dawson128

Neither although last night I made a tune using some settings from brains basemap. As of right now I haven't "borrowed" any settings. The tune I made last night I was going to test today. I'm about to go try and start the car now that it's warm. Will data log

dawson128

Ok.... so something is definitely wrong. The car started up and was acting like it was running on... less than normal cylinders. I have it on video and will upload it if needed. It smoothed out (a little) after idling for 15 seconds or so. Pulled out and took it easy just to warm it up than once it was warmed up I started getting on the throttle a bit more. The exhaust note was still not the consistent hum it usually is. Close, but not normal. It was kind of rumbly, almost like subaru style, as if it was on 3.. wtf. So I came back to the house, power cycled, and this start seemed better. Took it out for a drive and it was back to normal...WTF!! This has not the first time this happened. The thrid time actually. One one of the first couple days I installed the megasquirt I had a similar experience, except much worse. This time the difference in sound/power was somewhat noticeable but if I wasn't listening for it I wouldn't have noticed, but the first and second time this happened, it was DEFINITE. Sounded exactly like this (NOT MY CAR) https I pulled over, shut the car off, started it back up and it seemed fine. Pretty much the same procedure as today.. How is this possible? It's almost like one of the injectors is not getting signal to open until I restart everything....

Something about my car/MS is definitely not normal.

Datalogs and tune included. One running on almost three, the other running normally, or at least as normal as it has on the MS.

StanTheMan

Just a wild guess,

your cranking is set at 500. Your cranking in real life is somewhere around 190..... see if the cranking rpm will make a difference. Although muine is a NA I have an NB starter motor. Mine is set at 220 set yours at 250 or 300?

dawson128

Ill lower it, but I can't even begin to see how my cranking speed setting would effect running issues

StanTheMan

Just saw your above post....I somehow missed this was for a Toyota.
I didn;t realise you had started it.

My apologies

dawson128

Oh that's not my car, I was just using it as an example as to how my exhaust sounds when I have this strange issue.. which these strange issues just keep slapping me in the face out of nowhere as they come and go, seemingly at random with no solution. So far they include: car turns into a Subaru due to 3 cylinders running, starter kicks back at 0 degree advance, we will see what they throw at me tomorrow.

StanTheMan

Other things Ive noticed. I hope you don't mind.

In the fuel calculation , you've set the required fuel to 11.2 ms. thats fine.

would it make a difference if you actually filled out all the the proper settings.
like fuel flow of your injectors & correct engine size?

In your trigger angle offset you are running -2.00

I have fastly different settings, but my CAS is set dead on 10 deg BFDC. and trigger offset is like 13 deg. In my case I have some long duration cams.which would make some difference
I know this is exactly what youve been talking about.....but thats really odd.

StanTheMan

In Idle control,
\your valve mode is inverted. rather than normal.
But your valve settings are standard
closed at 32.9
open at 61.9

so the valve is working i reverse or that's how I understand it

I might be talking ****......hopefully not. Thats just what I noticed

dawson128

No need to be sorry I don't think it would make a difference as long as req fuel is close. And if I'm correct, trigger angle is simply how many degrees from TDC the "trigger" is. So if I were to rotate my CAS 2 degrees and set it to 0, it would be the same.