MEGAsquirt A place to collectively sort out this megasquirt gizmo

Car doesn't start with MS3 Basic

Thread Tools
 
Search this Thread
 
Old 07-14-2017, 09:55 AM
  #1  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default Car doesn't start with MS3 Basic

I followed the instruction here ( https://trackspeedengineering.com/fi...20V3%20140.pdf ) and installed last night with AEM wideband and car didn't start.

I'm not sure what could be wrong as I followed the instruction pretty closely and reviewed all steps a few times. Made this video and PM'ed Rev but haven't heard back so I figure maybe someone else on MT can spot a noob mistake if I made one.


Thanks!
phocup is offline  
Old 07-14-2017, 10:04 AM
  #2  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,079
Default

sounds like you just need a bump in fuel...
Braineack is offline  
Old 07-14-2017, 10:56 AM
  #3  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

The second start attempt we gave it some throttle while cranking but it didn't work. Do you mean try this again but with more throttle or something else?
phocup is offline  
Old 07-14-2017, 10:57 AM
  #4  
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 15,178
Total Cats: 1,681
Default

He means it as in you need to do some tuning. Most likely adding fuel to your cranking settings.
shuiend is offline  
Old 07-14-2017, 11:04 AM
  #5  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

Okay, thanks. I'll do more research into how to do that. I was told it has base map loaded already for my 93 so had assumed the car would at least start without me needing to tweak map.

But at least its good that you guys didn't see any issue with the install itself. Thanks for looking.
phocup is offline  
Old 07-14-2017, 11:51 AM
  #6  
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 15,178
Total Cats: 1,681
Default

A base map "should" get you started, but it varies car to car. Some people have great luck, others have to do some tweaking.
shuiend is offline  
Old 07-14-2017, 12:56 PM
  #7  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,079
Default

Originally Posted by phocup
The second start attempt we gave it some throttle while cranking but it didn't work. Do you mean try this again but with more throttle or something else?
that's the opposite of adding fuel, in fact that reduces fuel, since add air.
Braineack is offline  
Old 07-14-2017, 02:47 PM
  #8  
Elite Member
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,979
Total Cats: 356
Default

You did disconnect the stock TPS and removed the STSIGN fuse, right?
Reverant is offline  
Old 07-14-2017, 02:56 PM
  #9  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

Yup both fuse and TPS are removed. You can see that at the start of my video.

To test I simply by swapped bakc in the old oem WB and old oem ECU, removed air line from TB to MS .. but no other changes. ST fuse is still removed. TPS still disconnected. Car started right away and idled.
phocup is offline  
Old 07-14-2017, 03:03 PM
  #10  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,079
Default

again, that the proves my theory. your base tune doesn't have enough fuel.

if it runs without vacuum, ie. 100kPa, then you've basically doubled the amount of fuel on a typical basemap.
Braineack is offline  
Old 07-14-2017, 03:05 PM
  #11  
Elite Member
iTrader: (10)
 
Reverant's Avatar
 
Join Date: Jun 2006
Location: Athens, Greece
Posts: 5,979
Total Cats: 356
Default

Switch your ignition settings to wasted spark, I derped and set it to coil on plug.
Reverant is offline  
Old 07-14-2017, 03:07 PM
  #12  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

Okay thanks. Will try that.
phocup is offline  
Old 07-14-2017, 03:08 PM
  #13  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,079
Default

that could cause the same effect as well :P
Braineack is offline  
Old 07-14-2017, 03:43 PM
  #14  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

That got it started! Though it struggled a bit to do so and immediately was showing super lean on AFR and died instantly at the first touch of throttle ( which adds air and lean it out further as Braineack taught me earlier ).

phocup is offline  
Old 07-18-2017, 08:01 AM
  #15  
Junior Member
 
mr.skywalker's Avatar
 
Join Date: Jan 2014
Posts: 145
Total Cats: 4
Default

I just got mine running a couple months ago on the same chassis but I have a VVT swap. The biggest thing that gave me trouble was the cold start enrichment was pretty lean(my buddy figured this out as I am still in the learning curve) and it sounds like you may have the same thing going on now that you have it started and it running lean. Ive heard it before and I'm definitely seeing it now, idle is the most difficult thing to get to run like factory.
mr.skywalker is offline  
Old 07-18-2017, 09:18 AM
  #16  
Newb
 
jordan.k's Avatar
 
Join Date: Oct 2016
Location: Australia
Posts: 18
Total Cats: 1
Default

Is your gauge calibrated properly? Didn't think you could idle an engine at 24:1 lol
jordan.k is offline  
Old 07-18-2017, 12:19 PM
  #17  
Junior Member
Thread Starter
 
phocup's Avatar
 
Join Date: Aug 2016
Posts: 343
Total Cats: 2
Default

Wideband gauge is AEM 30-0300 and its shouldn't need calibration, according to AEM at least.

After that last video, I was talking to a friend and theorized it was possibly a leaky gasket near the WB causing it to read lean. Either way, if the motor starts, then I think I can assume everything 'works' and its a matter of tuning the map. I'm not a tuner so if I'm going to pay for someone to tune it, I'll wait and do it once.

So .. uninstalled the MS / WB and started on my 99 swap. Half way through now. I'll bug Reverant for a 99 map when I'm done.

phocup is offline  




All times are GMT -4. The time now is 10:22 PM.