94 Megasquirt PNP 2 idle issues - 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 03-30-2013, 11:47 PM   #1
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Unhappy 94 Megasquirt PNP 2 idle issues

Okay, so I've read a lot and barely have anytime to go over and check things. Anyone with similar experiences please chime in. Got my MSPNP 2 new a few days ago. Installed exactly as instructed. Set up Fix Idle like told to at 10* Checked timing and it's relatively at 10* Starts up and Tuner on laptop everything connects and plays.

Car: 94 1.8L Miata all Stock OEM.

Problem: Idles above 1000 for about 5-7 seconds then jumps down to 400 and stays very low and sputters. Also my stock Cluster RPM Tach is dead?

Tried starting over by re up loading the 94 base map but still does the same. Afraid of the situation I unhooked the MSPNP 2. I hooked back on the OEM Ecu and everything is fine again. Any suggestions?
NobleMiata is offline   Reply With Quote
Old 03-31-2013, 01:02 PM   #2
Junior Member
iTrader: (5)
 
Join Date: Mar 2012
Location: Gilbert, Az
Posts: 337
Total Cats: 26
Default

Your tune needs work.

Could be any of 100 things. Post up your map, maybe we can look/help.
SJP0tato is offline   Reply With Quote
Old 04-01-2013, 04:28 PM   #3
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Will post ASAP. I work heavy hours. Any notable tuners in sacramento ca? Willing to just pay and hopefully get this over with.
NobleMiata is offline   Reply With Quote
Old 04-01-2013, 09:21 PM   #4
Junior Member
 
Join Date: Feb 2009
Posts: 67
Total Cats: 0
Default

If you are using the base map supplied from DIY Autotune, then you are using "PWM Warmup" idle algorithm. You most likely need to increase the duty % for the IAC valve.

Startup/Idle ->PWM Idle Duty Cycle. Here you enter "Idle PW" values for the various temps. Once you get the idle where you want it, turn on the lights, fan on high, etc. to make sure you are supplying enough air for the engine to handle the extra load of accessories.

Hope this helps.
John151 is offline   Reply With Quote
Old 04-01-2013, 09:53 PM   #5
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Quote:
Originally Posted by John151 View Post
If you are using the base map supplied from DIY Autotune, then you are using "PWM Warmup" idle algorithm. You most likely need to increase the duty % for the IAC valve.

Startup/Idle ->PWM Idle Duty Cycle. Here you enter "Idle PW" values for the various temps. Once you get the idle where you want it, turn on the lights, fan on high, etc. to make sure you are supplying enough air for the engine to handle the extra load of accessories.

Hope this helps.
Did what you suggested and it idles properly now. But still questionable is the drive, as it smells a bit lean. The RPM Tach on the Cluster is still dead? Will drive around to see if anything changes.
NobleMiata is offline   Reply With Quote
Old 04-02-2013, 12:24 AM   #6
Junior Member
 
Join Date: Feb 2009
Posts: 67
Total Cats: 0
Default

Are you using Tuner Studio?

Burn a log file and post along with your MSQ file.
John151 is offline   Reply With Quote
Old 04-02-2013, 09:50 PM   #7
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Ok, here are the Logs and the current Tune.
Attached Files
File Type: msq CurrentTune.msq (83.8 KB, 118 views)
File Type: msl 2013-04-01_17.40.48.msl (770.8 KB, 89 views)
NobleMiata is offline   Reply With Quote
Old 04-02-2013, 10:49 PM   #8
Junior Member
 
Join Date: Feb 2009
Posts: 67
Total Cats: 0
Default

Wideband?
John151 is offline   Reply With Quote
Old 04-02-2013, 11:47 PM   #9
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Innovate lc-1 on its way, so no. About a couple of days. Completely stock atm. Haven't had time to even get the gm iat on. But so far its running ok. The only thing noticeable is the lag when switching gears. Got 550cc injectors and 255lph fuel pump just sitting. Begi s3 being built as we type/speak.

My idea was to go step by step. Hook up mspnp2 make it run nice. Slap on iat. Then injectors and tune. Wideband gets here and get it on ASAP. Then hopefully the turbo kit would be just a bolt up and drive!

That was the plan. Rpm cluster tacho still dead. Matt said turn off tacho and I did but it still didn't work. So lost?
NobleMiata is offline   Reply With Quote
Old 04-03-2013, 12:06 AM   #10
Junior Member
 
Join Date: Feb 2009
Posts: 67
Total Cats: 0
Default

Quote:
Originally Posted by NobleMiata View Post
Innovate lc-1 on its way, so no. About a couple of days. Completely stock atm. Haven't had time to even get the gm iat on. But so far its running ok. The only thing noticeable is the lag when switching gears. Got 550cc injectors and 255lph fuel pump just sitting. Begi s3 being built as we type/speak.

My idea was to go step by step. Hook up mspnp2 make it run nice. Slap on iat. Then injectors and tune. Wideband gets here and get it on ASAP. Then hopefully the turbo kit would be just a bolt up and drive!

That was the plan. Rpm cluster tacho still dead. Matt said turn off tacho and I did but it still didn't work. So lost?
Your step by step plan is good, except you can't really tune until you have a Wideband, so add that and the IAT, and then start tuning. Until then, read as much as you can about MS tuning.

No idea why the tach does not work since your log file shows a good tach signal.
John151 is offline   Reply With Quote
Old 04-03-2013, 12:48 AM   #11
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Alright John, well thanks for making my car idle right. I'm so confused on the Tacho, will keep reading. Again, THANK YOU
NobleMiata is offline   Reply With Quote
Old 04-03-2013, 12:49 AM   #12
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Well, Thanks John for making my car idle right.

I'll keep reading and hopefully something comes up that makes my Tacho start jumping again. Weird, factory ECU no problem, MS says it's there but doesn't move it?
NobleMiata is offline   Reply With Quote
Old 04-03-2013, 09:13 AM   #13
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

tach out > ON > tachout
Braineack is offline   Reply With Quote
Old 04-03-2013, 12:28 PM   #14
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
tach out > ON > tachout
I believed I have tried that. Under extended right? Does nothing.
NobleMiata is offline   Reply With Quote
Old 04-03-2013, 12:34 PM   #15
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

oh you have a 94. toss a 1K resistor in the diagnostics box betweeen IG- and B+.
Braineack is offline   Reply With Quote
Old 04-03-2013, 01:19 PM   #16
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Please explain more as I am noobish. Sorry.
NobleMiata is offline   Reply With Quote
Old 04-03-2013, 01:45 PM   #17
Junior Member
 
Join Date: Feb 2009
Posts: 67
Total Cats: 0
Default

Brain - the log file NobleMiata posted shows a reasonable value for RPM, so I assume the issue is with TS?
John151 is offline   Reply With Quote
Old 04-03-2013, 02:12 PM   #18
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

He needs pull up on the dash-tach signal from the coils, that the stock ECU provided, but the new MS doesnt...
Braineack is offline   Reply With Quote
Old 04-03-2013, 10:16 PM   #19
Newb
Thread Starter
 
Join Date: Oct 2012
Location: Northern California!
Posts: 26
Total Cats: 0
Default

Haha it worked brain. It is safe to leave the resistor their? Or is there a better fix? Thanks all, so far that is. Now onto gm iat!
NobleMiata 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
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Any pnp megasquirt for 2001 Big_gumby WTB 0 09-30-2015 04:34 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM
1996 Turbo Build Goldwar DIY Turbo Discussion 2 09-29-2015 10:20 AM


Tags
idle, mspnp 2

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 09:00 PM.