Cold Start: Success! (also, I'm a dumbass) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 02-14-2008, 10:05 PM   #21
Junior Member
iTrader: (1)
 
Join Date: Apr 2006
Location: Kirkland, WA
Posts: 239
Total Cats: 0
Default

Joe, you are my hero. I had the same incorrect settings (I didn't even know that dialog existed). When I changed them to the ^ ones, my car fired immediately, as opposed to kind of "galloping" until it built up some momentum.

Of course, after it fired, it immediately died again. So I killed my ASE, and WE, and then started it again and kept it running with the throttle long enough for the AFRs to stabilize. I then added back in a bit of WE to bring the AFR back to around 14.0, and voila, rough idle at around 750 dead cold, and no stalling on the low dip after blipping. All this with no idle valve. I'm so stoked now... When I get my idle valve wired and configured, I should be able to get it just like stock.

-Mike
grippgoat is offline   Reply With Quote
Old 02-16-2008, 05:33 PM   #22
Junior Member
iTrader: (1)
 
Join Date: Oct 2005
Location: Charlotte, NC
Posts: 467
Total Cats: 0
Default

...

Last edited by JDMAflac; 02-16-2008 at 07:08 PM.
JDMAflac is offline   Reply With Quote
Old 02-16-2008, 06:37 PM   #23
Elite Member
iTrader: (17)
 
Join Date: May 2007
Location: NY
Posts: 1,614
Total Cats: 2
Default

i checked my settings yest and they were default just like Joe posted...onto to more troubleshooting...
TonyV is offline   Reply With Quote
Old 02-16-2008, 06:39 PM   #24
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Quote:
Originally Posted by tvalenziano View Post
i checked my settings yest and they were default just like Joe posted...onto to more troubleshooting...

You just have all kinds of issues don't you.
cjernigan is offline   Reply With Quote
Old 02-17-2008, 01:37 AM   #25
Elite Member
iTrader: (17)
 
Join Date: May 2007
Location: NY
Posts: 1,614
Total Cats: 2
Default

Quote:
Originally Posted by cjernigan View Post
You just have all kinds of issues don't you.
tell me bout it...
But reading MY thread u can see why I haven't even bothered going into this too much yet...
TonyV is offline   Reply With Quote
Old 02-19-2008, 03:09 PM   #26
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Quote:
Originally Posted by Joe Perez View Post
I haven't logged it on the scope, but it feels like it takes maybe one to one and a half complete revolutions before it fires. Basically, it feels almost exactly like stock. The only difference is that after it catches it immediately shoots to about 1,500, then wants to idle at about 500 RPM for a second, and then it settles.
Congratulations on starting your car again. :-) I have to do the same, it's revving too much when I first start it (wouldn't it be slick to have it wait a second at low idle before revving, so as to build oil pressure beforehand?)....

yeah, I guess the sig needs work. The stupid megasquirt "simplified" my car - from the complicated way it worked to the simple way it doesn't. :-P
AbeFM is offline   Reply With Quote
Old 02-19-2008, 03:41 PM   #27
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Quote:
Originally Posted by AbeFM View Post
Congratulations on starting your car again. :-) I have to do the same, it's revving too much when I first start it (wouldn't it be slick to have it wait a second at low idle before revving, so as to build oil pressure beforehand?)....

yeah, I guess the sig needs work. The stupid megasquirt "simplified" my car - from the complicated way it worked to the simple way it doesn't. :-P
You should be able to setup an ignition hold period so that the motor won't fire for one or two revolutions in order to build up oil pressure. If you're interested. Your low rpm idle idea sounds nicer though.
cjernigan is offline   Reply With Quote
Old 02-19-2008, 08:29 PM   #28
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

yeah, it already does that by plain not starting for the longest of times. Seriously annoying.

But I would really like to have a fast idle feature, say, 1500-2k for 30 seconds, only AFTER the motor gets going. Right now it's instantly jumps to 2500, then falls down to normal idle after a few seconds, the worst of both worlds. It does little to nothing to warm it, and give it abuse when you can't even pretend it warm/oiled.
AbeFM is offline   Reply With Quote
Old 03-19-2009, 01:33 PM   #29
Senior Member
iTrader: (2)
 
Join Date: Jun 2006
Location: Springfield, NJ
Posts: 670
Total Cats: 0
Default

Quote:
Originally Posted by Joe Perez View Post
Today at lunchtime (CLT = 70) my engine fired up and roared to life on the first turn of the key!

The back-story:

Since installing the MS about three weeks ago, I've waged an unending jihad against this massive cold start problem. I'd engage the starter, after a few seconds it'd cough, catch, run very poorly for a moment, then stall. Sometimes I could keep it running on the second or third try by working the throttle, sometimes not. Generally, by the fifth or sixth attempt I could manage to get it running by pumping the throttle and then holding it at about 2,500 for a minute or so. The neighbors were not enjoying this serenade every morning (fortunately, no fighting was necessary. )

Every morning I played with the cranking fuel, ASE, and warmup, throwing larger and larger numbers at them until I practically expected to see gasoline pouring out the tailpipe, but nothing. Always the same result: crankcrankcrankcrankcrank *sputter* ... *sputter* ...stall (repeat). I was really starting to worry that some night I'd kill the battery doing this.

It's been driving me absolutely nuts! I've been re-checking the hardware, using the 'scope to verify the injector timing relative to stock (it is slightly off, but not much), fiddling with values, cursing rather loudly, and just generally running around in all directions wondering where the hell I went wrong.

Last night, while on my second bottle of Deschutes Brewery's Black Butte Porter, I said "To Hell With It." I decided to try going back to 029v (from HR10d2) and generating a whole new MSQ from scratch. As I was about halfway through the process, I happened to notice a setup window that I'd overlooked previously. It's under Advanced -> Fuel Table Selection.

Holy freaking ****.

No wonder it felt like it was firing on 2 cylinders and that my changes to Cranking and Warmup were having no effect- it's because they weren't! With regard to the attached picture, the boxes highlighted in red default to OFF, and must be manually set to ON. Otherwise, you'll only be squirting two injectors during cranking, and all your precious warmup enrich values will be for naught.





I can't believe I am such an utter, total, dumbass to have missed this.
I discovered this year-old thread last night while reading up on ASE topics. Sure enough, the settings Joe mentions were 'off' in my files. Made the change this morning, then the car started MUCH easier than at any point since I started modifying it two years ago. LOL, I don't remember exactly what "stock" feels like, but it must be something like this. The car just said to me, "Okay, I'm on now, thank you," instead of roaring to life like a Mack truck ..... also the initially idle was much smoother too. Yay!

So, consider this post a major bump for anyone who forgot about Joe's tip and/or never read it in the first place.
evank is offline   Reply With Quote
Old 03-19-2009, 10:15 PM   #30
Junior Member
iTrader: (6)
 
Join Date: Aug 2008
Location: New Zealand
Posts: 250
Total Cats: 3
Default

Awesome

Glad I read it!
ogwazza is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Hey everyone another n00b here Big_gumby Meet and Greet 80 10-05-2015 05:06 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:13 PM.