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Old 07-13-2009, 07:45 AM   #1
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Default Turbo, megasquirt installed, car trying to start but needs help....

Got my Shanghai-S installed finally w/ crx intercooler. It was finally time to start it today, but no go! I did my timing belt and cas-o change while I was waiting for some stuff My car is a 95R. I made a thread on miata.net too, but maybe this is a megasquirt specific thing? I had the megasquirt in before the install, and it worked well enough. I'll make a list of things I think are important...

1. I have spark
2. Timing belt is right, no doubt about it
3. Car is cranking, but fails just right before....
4. Fuses are all intact from what I can see
5. Spark plugs look decent and firing order too
6. Battery is good

Concerns

1. I'm using Braineack's built MS, but I have my AFM still installed and connected as I'm waiting for the pipe I need to weld in the AIT bung w/bov.
2. With my MS connected to the laptop, I see everything except RPM. I don't know what else is important here but I did I activated hi-res as directed.
2. Did I damaged the $400 CAS?!

That's all I could think of right now since it's 5:45 am. I'm just tackling one thing off the list at a time right now and hoping it'll work.
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Old 07-13-2009, 05:06 PM   #2
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Here's what I'm seeing guys. I checked my coils and I got spark on both. I've cleaned the spark plugs, although they look a little rich (not wet). I messed with the crank setting and set it to crank at 300 rpm. I also tried setting the priming pulse to "after two seconds" but that didn't do anything. I have an intercooler, and it doesn't start with the stock ecu, same noise.



I'm running an AFM but the stock msq is using settings for "no afm." Should I try configuring it to use the AFM then see? I'm really searching all the threads I can read up, but I'm shooting in the dark and deathly afraid for my coils!
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Old 07-13-2009, 05:19 PM   #3
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I test everything out on my JimStim before I send the units out, it looks like it's not getting the CAS signal. That or I fubared the build and didn't notice it. However, if the MS isn't showing the RPM, then it shouldn't even spark.

Do me a favor and take a picture of the harness at the yellow connector on both sides, I want to see where I put all the wires.

You didn't fool around with the firmware or change the msq did you?
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Old 07-13-2009, 05:24 PM   #4
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No, I posted a thread a month back when the car was N/A and I plugged the MS in just to see. I got it running when it was N/A and idling fine. I tested plugs #1 and #3 and saw sparks flying each time. I'll take a pic of the harness real quick.
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Old 07-13-2009, 05:31 PM   #5
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I also have an LC-1 wb installed, calibrated fine, but did not get running yet since I couldn't start the car. The stock O2 and it's connector to the CAS is not plugged in. Just throwing things out there to help diagnose....

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Old 07-13-2009, 05:50 PM   #6
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see pic.
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Turbo, megasquirt installed, car trying to start but needs help....-harness.jpg  
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Old 07-13-2009, 05:54 PM   #7
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^Yes to both. I did mess up the markings on my CAS when installing the o-ring. Can a severely retarded/advance timing be causing this issue?
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Old 07-13-2009, 06:27 PM   #8
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Ignition channels reversed? Observe timing mark on pulley with gun attached to #1 while cranking. Is the timing mark even close? If not, put gun on #2 wire and try again.

Or just swap the 1/4 plug wires with the 2/3 plug wires at the coil and try cranking again.
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Old 07-13-2009, 06:34 PM   #9
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I'm going to check timing in a second, haven't slept in almost 30 hours lol. I switched the coil plugs and it ran worse. I also tried switching the plug wires also and it didn't start. I'm discouraged, but narrowing it down one by one is encouraging.
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Old 07-13-2009, 09:36 PM   #10
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Sleep got the best of me. Does the blue connector get power during crank? I tried hooking it up to the battery connection to the alternator but still couldn't get power to the light.
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Old 07-13-2009, 09:52 PM   #11
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i cant remember if it does or not, you can clip onto the alternator.
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Old 07-13-2009, 10:23 PM   #12
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Ughh, got the light hooked up to a fresh battery, and I'm not getting anything. I'll probably head up to Autozone and grab a new light just to see.
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Old 07-14-2009, 12:07 AM   #13
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New light is not working either. I rechecked for spark and I have it. I connected the positive to a fresh battery that's out of the car, the negative to one of the exposed nut in the bumper crush zone. I tried to use the aux blue connector, but I don't think this one gets power during crank (from another poster). Am I connecting it to the alternator right? I'm just clamping the positive to some wires leading to that plug.
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Old 07-14-2009, 12:23 AM   #14
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Could the ignitor be fried?
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Old 07-14-2009, 12:43 AM   #15
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I thought if I have spark that my coils/ignitors are good? On the ignitor themselves, there is a clear cover on both sides (I remembered both). All I know is that there are four strips underneath and mine are black. I didn't think much of it because it was uniformed on both side so perfectly.
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Old 07-14-2009, 08:41 AM   #16
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Damn, haven't slept in almost two days now. The timing light was good, tested in another vehicle. I checked my timing again and it's spot on. I'm getting spark. The only variable I'm unclear about at this point is my timing, which I haven't been able to get measured and megasquirt itself.

Braineak, is there anyway to make sure I didn't screw up the firmware somehow? All I do is connect it to my laptop, and hit the base map w/o AFM. I went through some of the menus and noticed the Cranking RPM to be very sporadic. It went from 3200 -> 7XXX -> 8100 without me doing much. I burned it to ecu and tried at 200 and 300 times but no go.
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Old 07-14-2009, 09:11 AM   #17
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You said the MS was running before you fooled with the TB/CAS? What's odd is, you shouldn't be getting any spark if the MS cannot see the CAS signal.
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Old 07-14-2009, 09:17 AM   #18
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I got it running yeah. I made a thread on it here when I started it.

https://www.miataturbo.net/forum/t36067/

You said "ok we are back to your first error. your MS is loaded with hr_10 code, but your software is looking for 029q."

^I'm still throwing that code above even right now, but the MS works like how it does in the vid. I place a spark plug on a strip of aluminum, turn the car to on (I get a small spark here), and then when I crank the car I get nice white sparks. I tested it on #1 and #2 a while ago, but I'll test and record it sometimes later again. I'm hoping since I got spark, fuel, timing (belt at least ; /) is right, that it's an MS error?

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Old 07-15-2009, 03:15 AM   #19
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My dowel pins on the pulleys are misaligned so my timing has been off, verified at miata.net. I feel like an idiot, but we narrowed it down and I got some good experience from it. Hopefully I'll work on it Friday and it'll start right up with the base map.
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Old 07-15-2009, 10:39 AM   #20
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let us know how it goes!
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