Another help with cranking setting thread 2000 NB 425cc MS2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-29-2013, 02:16 PM   #1
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Default Another help with cranking setting thread 2000 NB 425cc MS2

Hi miata turbo freaks,

I have not posted on here in a while. And I've been meaning to help where I can/ redo my parts thread for a budget turbo build for NB's.

So here is my problem- I've been boosted for a year and half now, moved to ND 4 months ago where it was -20's daily and colder. For the life of me I could not get the car to fire at times and even had to replace my starter from the too many cranks 6+ times a day.

The car cranks for at least 3-5 seconds on cold start. Usually about 3 on a hot or mild warm start. I have a newborn so time is limited in the garage, but I tried to tamper with my settings to help with the process, and even the "tuning megasquirt manual" says I should have cranking pulsewidths in very small values based on req_fuel but my numbers are in the hundreds, not in the "4.6, 10.0" values that I see with the manual. I adjusted too much but still have the previous tunes saved if need be.

I'm attaching the settings I have now for Cranking PW, Priming PW, ASE taper, ASE percentage, and WUE.

My req_fuel is 6.8 which I hope is correct for my RX8 425cc injectors.

Other than that, once warmed up, car runs great (especially after I relocated my IAC to the end tank on the intercooler instead of in front of the throttle body)

But my cranking and warming up is all shitty right now. I know they all 3 settings work with each other so adjusting one, adjusts another and so on. I'm trying to have a stockish fire up in the morning and afr's in the high 12's on a cold start and so on.

thanks for any advice. Sorry for the essay. current settings first
http://i23.photobucket.com/albums/b3...n/newprime.jpg
http://i23.photobucket.com/albums/b3...asepercent.jpg
http://i23.photobucket.com/albums/b3...ion/newwue.jpg
http://i23.photobucket.com/albums/b3...n/newcrank.jpg

old settings
http://i23.photobucket.com/albums/b3...ion/oldwue.jpg
http://i23.photobucket.com/albums/b3...asepercent.jpg
http://i23.photobucket.com/albums/b3...n/oldcrank.jpg
http://i23.photobucket.com/albums/b3...n/oldprime.jpg
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Old 04-29-2013, 03:12 PM   #2
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stop flooding the motor with key on and you might have a better chance to start.
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Old 04-29-2013, 04:32 PM   #3
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So I am for sure flooding it you think? Unless key on is code for something. Ill pull some out across the board
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Old 04-29-2013, 04:51 PM   #4
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flooding at key on is code for: at 20F coolant temps, you're injecting 20ms worth of fuel into your clyinders.

Last edited by Braineack; 04-30-2013 at 10:58 AM.
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