Freshly squirted noob needs a little help... - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to   Members

MEGAsquirt A place to collectively sort out this megasquirt gizmo

LinkBack Thread Tools
Old 10-25-2009, 06:17 PM   #1
Junior Member
Thread Starter
Join Date: Oct 2009
Location: Bournemouth, Dorset UK
Posts: 57
Total Cats: 0
Default Freshly squirted noob needs a little help...

Hi all,

been floating around a week or so reading up on the MS stuff and now i need some help.

I've just (only today) fitted the MS in the car and have a couple of problems -

Idle control valve is disconnected. This is the only way the car will idle. When its connected the car idles normally for warmup then shoots up to 2.5k-3k rpm. I've tried the diode across the pins on the idle valve connector (as per the megasquirt build) however this makes no difference at all.

Went for a 25 mile (with the idle control valve disconnected) blast, dual carriageway, b roads and abit of traffic and the car seems fine, albeit running rich.

Am i doing the car any damage with this disconnected? I've checked my MS idle settings against a friends and they are the same, only difference is I have 1.8 injectors on a 1.6 engine.

I've fitted my wideband (Stack) yet i've been told i need to set the centre voltage, anyone know what these figures are? Or how to set up the Stack wideband with MS?

I'm a total noob with all this stuff and need simple instructions!

Thanks in advance guys, i'm sure they'll be someone out there who will no what i need to do.


EDIT - i'm using tunerstudio and its an MS DIY version 1.
fr3n2y is offline   Reply With Quote
Old 10-25-2009, 06:25 PM   #2
Junior Member
Join Date: Oct 2008
Location: Harrisonburg,VA
Posts: 134
Total Cats: 1

Id say your injectors but we will wait and see what brain has to say he should know.
Bassmachine is offline   Reply With Quote
Old 10-25-2009, 06:47 PM   #3
Cpt. Slow
iTrader: (24)
curly's Avatar
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 11,616
Total Cats: 463

Have you changed your injector settings to the 1.8 size? If not it's no surprise you're running rich and no surprise it's dieing. The MS is trying to idle your car thinking it's using 1.6 injectors. If you did change the injector settings, then I have no f'ing idea.
curly is online now   Reply With Quote
Old 10-25-2009, 07:05 PM   #4
Elite Member
iTrader: (9)
Join Date: Sep 2008
Location: Bloomfield, Michigan
Posts: 5,672
Total Cats: 9

Just put a filter on the idler valve, is what I did, as per Brain cars running map dont need metered air.
buffon01 is offline   Reply With Quote
Old 10-25-2009, 07:19 PM   #5
Junior Member
Join Date: Jun 2008
Location: New Forest, U.K.
Posts: 336
Total Cats: 4

I am the other guy "helping" him with this. Yes we changed the injector flow rate settings to account for the larger injectors. Its damn strange, we both built our ms's to brain's directions, mine works fine with the idle air valve plugged in. His stars ok (no tuning as of yet) and idles where it should for about 25-20 seconds, then suddenly it will shoot up to around 2500 or so and sit there. Unplug the IAC and its not a prob.

As you say buffon, is it not even needed? frankly it runs pretty damn good with it unplugged, if he/we don't need it then why do we all bother with the PWM mods to get it working?
Blaize is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 Today 07:58 AM
Rotrex cooling issue gsyk59 Engine Performance 49 11-22-2015 04:11 AM
Complete BEGI S3 NB Kit, Full Enthuza 3" Exhaust, ACT HD Clutch, MS2 PNP, Wideband kronikker Miata parts for sale/trade 17 10-06-2015 10:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 09:39 AM
Mystery Engine Trouble. Halp,! vehicular General Miata Chat 12 09-14-2015 03:17 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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 10:20 AM.