Troubleshooting no fuel issue - 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 10-06-2016, 02:19 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default Troubleshooting no fuel issue

Edit after further research::::
Ok, I was very vague and very frustrated when I posted this originally. Which makes me sound like a big dummy, my apologies.
---
I am not fluent at all with Tuner Studio (for troubleshooting). After brainstorming, I had a lightbulb to run a high speed log (which is attached). This tells me the senors are all reading as they should.

Cylinder 2 and 3 plugs are dry. Cylinder 1 and 4 are black (and almost seem like raw fuel is present)

I am currently still using the nb1 coilpacks and shaved plug wires to fit in the nb2 plug holes (just wanted to let you all know this). I have an inline spark checker (blinky light) and it does fire on cylinder 2 and 3.


Backstory: My car is a 1999, with a 99-00 MS3. I have been on a mp62 on 14psi, figured I should have forged internals, so I built a motor. I swapped in a 01 VVT motor with forged internals and here I am trying for that first startup on a new setup!




Basic: no fuel in cylinder 2 and 3.

I have been running a Rev built Ms3 for over a year.
Last week I swapped in a new motor.
After the install, hooked up the harness, coolant,oil.. I go to start for the first time and it spit and sputtered.
After taking the plugs out, I learned they dont even smell like fuel.

In Tuner Studio I tested spark and injectors, both fire, so they are hooked up correctly.

What should I look into next? Kind of stumped.

I bet it will be something dumb but I need another brain on this one.
Attached Files
File Type: csv compositelog.csv (10.4 KB, 5 views)

Last edited by Stockish; 10-07-2016 at 12:55 AM. Reason: I am a dork
Stockish is offline   Reply With Quote
Old 10-06-2016, 03:56 PM   #2
SadFab CEO
iTrader: (3)
 
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 3,299
Total Cats: 399
Default

Move injectors around, see if problem follows.
hi_im_sean is online now   Reply With Quote
Old 10-06-2016, 04:22 PM   #3
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by hi_im_sean View Post
Move injectors around, see if problem follows.
That I also did. Something isn't telling 2 and 3 to go. Which is very bizarre.
Stockish is offline   Reply With Quote
Old 10-06-2016, 05:03 PM   #4
SadFab CEO
iTrader: (3)
 
Join Date: Sep 2012
Location: your mom's house phoenix, AZ
Posts: 3,299
Total Cats: 399
Default

Im assuming batch? Is 12V present on 2 and 3? When you did injector output test, how did you check that they both fire?
hi_im_sean is online now   Reply With Quote
Old 10-06-2016, 05:09 PM   #5
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 993
Total Cats: 38
Default

So 1&4 get fuel? Only 2&3 are dry? If so, fix your wiring.
stefanst is offline   Reply With Quote
Old 10-06-2016, 05:43 PM   #6
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by stefanst View Post
So 1&4 get fuel? Only 2&3 are dry? If so, fix your wiring.
What is there to fix? The injector harness is plugged into the main harness just as it was 2 weeks ago.

Say something dumb like **** cam sensor signal was an issue, one would assume no injectors would open right?

But I know the wiring is correct because I testedit in TunerStudio.
Stockish is offline   Reply With Quote
Old 10-07-2016, 12:20 AM   #7
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by hi_im_sean View Post
Im assuming batch? Is 12V present on 2 and 3? When you did injector output test, how did you check that they both fire?
I changed injector ms to 1 from 200, so I got a constant 12.
Stockish is offline   Reply With Quote
Old 10-07-2016, 12:24 AM   #8
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default



Turning over this is what I get
Stockish is offline   Reply With Quote
Old 10-07-2016, 12:34 AM   #9
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 993
Total Cats: 38
Default

CAM/ CRANK signal looks good to me.
Any changes in your tune?
stefanst is offline   Reply With Quote
Old 10-07-2016, 12:46 AM   #10
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by stefanst View Post
CAM/ CRANK signal looks good to me.
Any changes in your tune?
I made zero changes, although I have learned quite a few new curse words in the last week.
Stockish is offline   Reply With Quote
Old 10-07-2016, 12:46 AM   #11
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Uploaded composite log and edited first post to be more descriptive.
Stockish is offline   Reply With Quote
Old 10-07-2016, 01:11 AM   #12
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 993
Total Cats: 38
Default

Other than the 12V, do you have any other indication that the injectors on 2&3 are working in test mode? Are they clicking?
In my experience, if the tune is correct and the wiring is too, either all injectors fire or none.
stefanst is offline   Reply With Quote
Old 10-07-2016, 06:17 PM   #13
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by stefanst View Post
Other than the 12V, do you have any other indication that the injectors on 2&3 are working in test mode? Are they clicking?
In my experience, if the tune is correct and the wiring is too, either all injectors fire or none.
Tonight my plan is to get a 9v battery and test leads to try and hear a click in the injector or some sort. If that tests fine (im sure it will) I plan on having someone else turn the car over while I use a stethoscope on an injector. Is this dumb?

Stockish is offline   Reply With Quote
Old 10-07-2016, 06:23 PM   #14
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by Stockish View Post


Turning over this is what I get
Also, by looking at this, its safe to be reassured that my timing it set correctly am I right with saying that?

Stockish is offline   Reply With Quote
Old 10-11-2016, 12:37 PM   #15
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Took a break from troubleshooting for the weekend. Went to an Autox at Road America!

Anyway. Last night I did the following tests:
First I tested each injector at the harness for signal with a light, all 4 blinked at key on and they blinked when turning over. Then, I zip tied the injectors to the rail and took the rail OUT of the car and verified they sprayed when they should. Each injector sprayed at key on and according to the cam signal.

Next I hooked a timing light to plug wire 1 and matched the injector (plug 1 injector 1) and turned it over. They both lit as they should.
I did notice the timing light lit once before the injector pulse (the is must be the wasted spark at exhaust?)

So I pretty much ruled out simple stupid stuff.

Plan is to take VC off and check timing again and measure clearances for the shims.

Constructive criticism is greatly appreciated as I want to drive my car before it snows :(

Stockish is offline   Reply With Quote
Old 10-11-2016, 12:41 PM   #16
Elite Member
iTrader: (5)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 1,653
Total Cats: 111
Default

Post the tune
ryansmoneypit is offline   Reply With Quote
Old 10-11-2016, 01:53 PM   #17
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Quote:
Originally Posted by ryansmoneypit View Post
Post the tune
Will do that tonight.
I am running 9:1 CP pistons. I was aware I will need to adjust for that, but they should fire right?
Stockish is offline   Reply With Quote
Old 10-11-2016, 02:28 PM   #18
Elite Member
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,611
Total Cats: 101
Default

I feel like I missed something, but it sounds like you're not getting spark on 2 cylinders that run off the same coilpack on a 99 car that is notorious for having bad coilpacks. Have you tried swapping out the coilpack?
pdexta is offline   Reply With Quote
Old 10-11-2016, 11:38 PM   #19
Junior Member
Thread Starter
 
Join Date: Aug 2015
Location: Wisconsin
Posts: 49
Total Cats: 0
Default

Here is my msq. I have NOT messed with anything from the time I shut off my stock nb1 motor, to swapping in my nb2 motor with CP 9:1 pistons.

No tuning has changed.

If anyone feels ignition should be different please feel free to enlighten me.
Attached Files
File Type: msq nb1tonb2.msq (177.6 KB, 5 views)
Stockish is offline   Reply With Quote
Old 10-11-2016, 11:51 PM   #20
Boosting since 1984
iTrader: (1)
 
stefanst's Avatar
 
Join Date: Sep 2011
Location: Levittown
Posts: 993
Total Cats: 38
Default

I'm still not 100% sure if you're lacking spark or fuel. From the latest development it looks like no spark -correct? If all plugs spark in test-mode you should be fine. Check again.
stefanst is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Installed COPS, now getting misfires kmo25 DIY Turbo Discussion 12 09-27-2016 11:31 PM
Installed a Hydra Today - Boost Control Question2003 pmhellings Hydra 3 09-25-2016 10:59 AM
Time to step it up, thoughts? Hificruzer226 Engine Performance 4 09-24-2016 08:35 PM
Running Lean in WOT. Another day it's fine Lawone ECUs and Tuning 14 09-23-2016 05:28 AM
Running way rich at idle mike103 MEGAsquirt 3 09-12-2016 07:48 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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 04:41 PM.