MS wont run with map sensor connected - 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 03-27-2011, 01:44 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default MS wont run with map sensor connected

I had a lot of problems with my MS, i installed it, uninstalled it numerous times. i guess the last time i put it in the car i forgot to run a vacuum line to the ecu (previously i had run one over the windshield). the car started and idled....ok like that. it was running pig rich though, the smell of gas in the garage was unbearable. so today i went to the garage and ran a line through the firewall and hooked it up to the ecu. the car wont start now. i unhooked the line and the car ran again.


any ideas?

Last edited by DrewLGT; 03-31-2011 at 09:43 PM.
DrewLGT is offline   Reply With Quote
Old 03-27-2011, 09:59 PM   #2
Junior Member
 
Join Date: Apr 2010
Posts: 107
Total Cats: 0
Default

Can you post a log of trying to start it with the vac line plugged in?
bearda is offline   Reply With Quote
Old 03-27-2011, 10:11 PM   #3
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

I will as soon as I get a chance.
DrewLGT is offline   Reply With Quote
Old 03-27-2011, 10:20 PM   #4
Hittin' Boost & Cones
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

You have your megatune / tunerstudio set to the right size map sensor?
240_to_miata is offline   Reply With Quote
Old 03-27-2011, 10:40 PM   #5
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Quote:
Originally Posted by 240_to_miata View Post
You have your megatune / tunerstudio set to the right size map sensor?

That's a good idea, I'll check.
DrewLGT is offline   Reply With Quote
Old 03-28-2011, 09:43 AM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,895
Total Cats: 1,792
Default

Did you alter the tune when you had the map line uninstalled?
Braineack is online now   Reply With Quote
Old 03-28-2011, 11:22 AM   #7
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
Did you alter the tune when you had the map line uninstalled?
I set the timing
DrewLGT is offline   Reply With Quote
Old 03-28-2011, 05:18 PM   #8
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Chances are your tune is too lean, as unplugging the MAP sensor adds more fuel.
Matt Cramer is offline   Reply With Quote
Old 03-28-2011, 05:52 PM   #9
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Quote:
Originally Posted by Matt Cramer View Post
Chances are your tune is too lean, as unplugging the MAP sensor adds more fuel.
my car is pretty much bone stock, and afaik is running the mspnp base tune. what made me initially realize the MAP sensor was unhooked was the car running pig rich.
DrewLGT is offline   Reply With Quote
Old 03-29-2011, 10:05 AM   #10
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Quote:
Originally Posted by DrewLGT View Post
my car is pretty much bone stock, and afaik is running the mspnp base tune. what made me initially realize the MAP sensor was unhooked was the car running pig rich.
Confirm this - don't go by AFAIKs.
Matt Cramer is offline   Reply With Quote
Old 03-29-2011, 11:06 AM   #11
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Quote:
Originally Posted by Matt Cramer View Post
Confirm this - don't go by AFAIKs.
I looked in tunerstudio. I see a currenttune.msq, how can I be sure that's the right tune?
DrewLGT is offline   Reply With Quote
Old 03-29-2011, 11:09 AM   #12
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

I'd reload the MSPNP base map.
Matt Cramer is offline   Reply With Quote
Old 03-29-2011, 11:31 AM   #13
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

Thanks Matt, I'll give that a try.

I tried to pull a log, but when I opened it in megalog viewer it was blank. I don't know what I did wrong...
DrewLGT is offline   Reply With Quote
Old 03-31-2011, 09:36 PM   #14
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

bit of an update, i tried the mspnp base map, but it's for a MS1, i have an MS2. had a ton of errors when i flashed it to the ECU, the car still wouldn't start, so i went back to the original tune braineack had on the ecu when i got it. i pulled the plugs, and they were BLACK, looked like they were made of velvet. i replaced them, and now the car will fire, but it just sputters, and dies within a few seconds. if i tap the throttle lightly i can keep it alive a little bit longer, not much though. too much gas and it dies immediately.


i searched and read quite a few threads, and am thinking maybe the colder weather has something to do with it. i'm going to try to read more about the cold cranking settings, and give that a try.
DrewLGT is offline   Reply With Quote
Old 04-01-2011, 12:05 AM   #15
I'm Miserable!
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

you should try the diypnp startup map instead the MSPNP maps
Its a MS2 tuned map
if you were to, note they used different settings in some places.
You need to alter fuel and timing to get a stable idle, if you know your spark timing is correctly aligned with your crank than I say let it work off the spark map like at 17
But you can try adjusting your fuel while you hold the throttle open a tad to dial in it till it picks up and idles without holding the throttle open.

Also

allways datalog anything you do while trying to work on it so everyone can see and you show someone if you have issues

Last edited by Techsalvager; 04-01-2011 at 11:11 AM.
Techsalvager is offline   Reply With Quote
Old 04-01-2011, 07:13 PM   #16
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Aug 2008
Location: Evansville, Indiana
Posts: 314
Total Cats: 0
Default

made a little more progress today. i adjusted the ASE, and was able to get it to run for more than a few seconds at a time. it doesnt run well though, i think it's only running on two cylinders. i'm afraid i might have lost a coil pack somewhere along the way.


can someone tell me why when i try to pull a log, it ends up blank in megalog viewer? when i try to open the log it says something about the y axis...
DrewLGT is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
In need of base map for stock 1997 brandonbkd MEGAsquirt 0 09-29-2015 12:52 AM
Missing/knock at idle, can someone point me in the right direction? Mikel MEGAsquirt 4 09-28-2015 05:46 PM
Got bad Crank Angle Sensor and Random Misfire codes, but runs fine. Greasyman General Miata Chat 2 09-28-2015 11:44 AM


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 01:17 PM.