MSPNP / MS-1, Injector Test mode or simulating triggers? - 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 06-17-2010, 01:12 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Posts: 201
Total Cats: 12
Default MSPNP / MS-1, Injector Test mode or simulating triggers?

The engine on my track car recently had a melt-down.
Built 1.9L, lots of dyno time and tuning.

Cyls 3 & 4 look to have gone very lean, which resulted in burnt/melted pistions.

The engine has been pulled. I'd like to test the fueling system as a whole, to check that the fuel pump, fuel pressure regulator, and injectors are all working properly.

Is there a way to put the MSPNP/MegaSquirt-I into injector test mode, or to simulate triggers to it?

My plan is to fire all 4 injectors into separate containers, and to measure and compare the amount of fuel the each puts out during the test.
wildo is offline   Reply With Quote
Old 06-17-2010, 01:27 PM   #2
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

This would be easy to do with a JimStim and a power supply. You'd need to open up the ECU case lid (4 screws), unplug the main ribbon cable, and plug the stim onto the mainboard DB37 connector. The stim would simulate a tach signal to the ECU, which would cause it to deliver fuel.

http://www.diyautotune.com/catalog/j...led-p-178.html
http://www.diyautotune.com/catalog/m...ply-p-168.html
http://www.diyautotune.com/catalog/j...ack-p-210.html

If you want to build the stim youself and save a little money, we also offer it as an unassembled kit on our website.
Ben is offline   Reply With Quote
Old 06-17-2010, 01:57 PM   #3
Junior Member
iTrader: (2)
 
Join Date: Nov 2008
Location: Olathe, KS
Posts: 119
Total Cats: 2
Default

hmm, been a while since I messed with MS, but pretty certain there is a bench test feature now. digging around for it. Pretty sure it will require a flash of that code. Or a dedicated chip with it loaded.
found it. This is a MS2 feature for "Injector Test Mode"
http://www.megamanual.com/mt31.htm#oi

Using the stilulator is the other option as noted. That option would also give you a baseline flow of your injectors to your tune table.

Last edited by Justaturbo95; 06-17-2010 at 02:03 PM. Reason: link
Justaturbo95 is offline   Reply With Quote
Old 06-17-2010, 03:17 PM   #4
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Injector test mode is not available with the MS1.

It is something that MS2 and MS3 can do, but it only opens the injectors for a limited time (so you don't fill your motor with fuel) so may not be suitable for a "flow test".
Ben is offline   Reply With Quote
Old 06-17-2010, 03:44 PM   #5
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Sep 2006
Posts: 201
Total Cats: 12
Default

Thanks Ben.

I have a StimBoard that I built for a generic MS-I a while back, and figured it would be a headache to modify it to work with the PNP. That said, it sounds like the JimStim is a good way to go.

Are there jumpers that need to be attached to work with a 96-97PNP, and if so, is that documented anywhere?
wildo is offline   Reply With Quote
Old 06-18-2010, 10:27 AM   #6
Junior Member
iTrader: (2)
 
Join Date: Nov 2008
Location: Olathe, KS
Posts: 119
Total Cats: 2
Default

Ben,
ok, I should have said requires MS2. Your post came in whie I was typing my response. Never had that happen before. Anyway, as I recal the point of a set duration was specifically for flow testing.
Justaturbo95 is offline   Reply With Quote
Old 06-18-2010, 10:57 AM   #7
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

You could use a standard stim if you set up your MegaSquirt for basic trigger. Or you can leave your .msq alone and run off a JimStim. 4G63 mode would require a 2nd trigger input which is jumped to pin 25 on the stim.
Ben 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 12-15-2017 09:00 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
SimExperience fiberglass race seat in Chicago area chris101 Miata parts for sale/trade 2 10-09-2015 10:08 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 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 09:16 AM.