no start with braineack ms - 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 02-23-2008, 07:01 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: Campbell, California
Posts: 106
Total Cats: 0
Unhappy no start with braineack ms (solved)

it's running now, it fired right up. i didnt get the instructions from braineack in time was probably what the problem was. but i switched the wires over. it runs rough, but its running as i type

OLD POST
i installed the unit yesterday, and to my surprise my car wouldnt start. i changed the firmware over to 029v so that i could try jerry's base 90-93 no afm map and i even installed the stock injectors to weed out that possibility. the car is getting spark and fuel because its backfiring out of the intake and exhaust. no matter what i did with cranking pulsewidths and timing itself i could not get my car to run. there were a few times it would hit on a couple of cylinders and it would run for a couple of seconds then it would die. i'm completely able to communicate with the ms and see all of its parameters.

i've tried a number of maps, the only difference was the backfiring would vary between them.

i plugged in the stock ecu and the car ran fine.

my setup
-1990 miata
-td05h big 16g
-stock injectors (for troubleshooting)
-hardwired walbro 255lph pump
-iridium spark plugs
-stock wires
-braineack pnp ms w/ afm removal,fan control,idle control and stand alone harness
-stock 1.6
ngk afx wideband (wired to ms)

oh yeah, i'm using the mspnp software bundle. hope someone can give me some useful advise, since i'm at a loss here.

Last edited by juhanis; 02-23-2008 at 07:14 PM.
juhanis is offline   Reply With Quote
Old 02-23-2008, 07:04 PM   #2
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

My first guess is to try switching the plugs on the coilpack, perhaps they are backwards.
patsmx5 is offline   Reply With Quote
Old 02-23-2008, 07:08 PM   #3
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: Campbell, California
Posts: 106
Total Cats: 0
Default

odd... i guess, i did switch the whole computer. i'm at the car right now, i'll give it a shot. thanks. -update- it worked... its running at least. thanks dude.
juhanis is offline   Reply With Quote
Old 02-23-2008, 07:16 PM   #4
Junior Member
 
Join Date: Mar 2006
Location: Sydney Australia
Posts: 138
Total Cats: 0
Default

Another guess is watching your pw's in Megatune.
If they aren't pulsing during cranking, unplug your TPS switch.

I wired my 90 TPS for a future VTPS mod, but found the on/off switch type TPS was sending the MS into flood clear mode. Unplugging the TPS made it start.
ampz is offline   Reply With Quote
Old 02-23-2008, 07:35 PM   #5
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Quote:
Originally Posted by juhanis View Post
odd... i guess, i did switch the whole computer. i'm at the car right now, i'll give it a shot. thanks. -update- it worked... its running at least. thanks dude.
Sweet, I actually helped someone with MS and I'm not even running spark yet.
patsmx5 is offline   Reply With Quote
Old 02-23-2008, 08:21 PM   #6
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: Campbell, California
Posts: 106
Total Cats: 0
Default

i had no idea that the damn wires would need to be reversed hahaha
juhanis is offline   Reply With Quote
Old 02-23-2008, 08:29 PM   #7
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Yea that was just my guess from your description. If the wires are backwards, it will try to start, backfire, sometimes start backwards, all kinds of stupid crap.
patsmx5 is offline   Reply With Quote
Old 02-23-2008, 08:37 PM   #8
Senior Member
iTrader: (7)
 
Join Date: Jul 2007
Location: Milpitas, CA
Posts: 1,057
Total Cats: 1
Default

generally, its trying to ignite the engine to make it rotate the other way.

thats why you got the backfire coming out of the intake because the intake valves are open instead of exhaust ones


on the other hand, finally another MSer in the bay area.
that makes 3 , soon to be 4 as i just assembled my buddy an MS for his car.


Juhanis,
are you going to be running EBC mod?
im still a little clueless on getting the damn thing to work.
Marc D is offline   Reply With Quote
Old 02-23-2008, 09:52 PM   #9
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: Campbell, California
Posts: 106
Total Cats: 0
Default

hey dude, yeah i did buy the ebc, its not hooked up yet. so, i dont know anything about really how it works yet. i'm just happy the son of a bitch runs. yo, if your not busy, you're welcome to come over... i'm just chugging away on this thing. just let me know.
juhanis is offline   Reply With Quote
Old 02-24-2008, 04:06 AM   #10
Elite Member
iTrader: (15)
 
Join Date: Sep 2007
Location: Incline Village, NV
Posts: 2,073
Total Cats: 5
Default

Quote:
Originally Posted by badboy88000 View Post
generally, its trying to ignite the engine to make it rotate the other way.

thats why you got the backfire coming out of the intake because the intake valves are open instead of exhaust ones


on the other hand, finally another MSer in the bay area.
that makes 3 , soon to be 4 as i just assembled my buddy an MS for his car.


Juhanis,
are you going to be running EBC mod?
im still a little clueless on getting the damn thing to work.

#5
thesnowboarder is offline   Reply With Quote
Old 02-24-2008, 04:42 AM   #11
Senior Member
iTrader: (7)
 
Join Date: Jul 2007
Location: Milpitas, CA
Posts: 1,057
Total Cats: 1
Default

^^ lol , ok lets make that 5.


Juhanis, cant come over today, had to work. ill be available later in the week, could help you tinker out the problems.
Marc D is offline   Reply With Quote
Old 02-24-2008, 05:48 AM   #12
Junior Member
Thread Starter
 
Join Date: Jan 2007
Location: Campbell, California
Posts: 106
Total Cats: 0
Default

i got this thing running pretty well now...
juhanis is offline   Reply With Quote
Old 02-24-2008, 07:19 AM   #13
Senior Member
iTrader: (7)
 
Join Date: Jul 2007
Location: Milpitas, CA
Posts: 1,057
Total Cats: 1
Default

thats good

let me know when you gonna tinker with it, im gonna be switching over to HiRes soon.
Marc D is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
Buzzing from driver side of engine bay? (MS3 install) nick470 MEGAsquirt 7 06-16-2017 02:53 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
Bizarre connection issue? nick470 MEGAsquirt 1 09-30-2015 11:32 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 01:04 PM.