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Old 04-30-2011, 11:49 AM   #1
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Default Help! Engine cutting out

I've had a small issue with the engine cutting out on occasion ever since I've installed the MS3 on my 01. Thought it was the same thing that I've heard people talking about on the forum. It rarely happened and wasn't really a nuisance.

This morning I'm on my way to a track event and the problem has escalated and the car is damn near un-drivable and seems to be getting worse. Currently stuck at a McDonald's Motorsports using the wifi and I'm worried that I might actually damage something if I continue to drive the car towards the track or even try to make it back home.

Here's what I've tried to do. Several different tunes to include the initial base tune that Reverant sent me with the MS. Same issue doing that. Looking at my logs seems to confirm that it's not an actual tuning issue, but possibly a hardware issue. Can someone take a quick look at these logs and give me a second opinion. Not sure what constitutes a reset, but it seems to have the symptoms of that.
Attached Files
File Type: msl 2011-04-30_07.11.46.msl (80.4 KB, 48 views)
File Type: msl 2011-04-30_07.01.53.msl (230.1 KB, 77 views)
File Type: msl 2011-04-30_07.19.30.msl (679.8 KB, 68 views)
File Type: msq 2011-04-29_18.06.24 after hand smoothing.msq (139.6 KB, 70 views)

Last edited by JayL; 05-02-2011 at 10:53 PM.
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Old 04-30-2011, 12:02 PM   #2
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losing sync.

youre getting these:

31 = Miata 99-00 - 2 cams not seen
32 = Miata 99-00 - 0 cams seen



when i open your msq it's not set to "miata 99-00" in ignition options/wheel decoder, but "EDIS"
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Old 04-30-2011, 12:11 PM   #3
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That's weird, when I open it and go under Ignition Settings, Ignition Options/Wheel Decoder it shows Miata 99-04 when I look at it.

I'll try to load it again and verify that. It would really be nice if it the fix is that simple. Thanks in advance.
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Old 04-30-2011, 12:17 PM   #4
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could have have been differences in the firmware i loaded your map with. but all the logs show that your losing sync.


obviously your map has you running 99-04 if the errors are showing miata specific ones.
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Old 04-30-2011, 12:26 PM   #5
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What would be the next logical step in troubleshooting this?
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Old 04-30-2011, 12:29 PM   #6
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no idea. double check your crank and cam sensor are in position?
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Old 04-30-2011, 02:17 PM   #7
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It shows 99-04 properly when I opened it. I didn't have this issue at all for the 2+ weeks I had it running on mine.

Can you take a composite log? Go to Diagnostics, check "Capture to log file" and then click Start. Drive some until you get the problem happening. Stop and post the log file.
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Old 04-30-2011, 02:23 PM   #8
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No useful info fom me on this but i am just amazed to see how the member are willing to help at any time. Total strangers. Really ******* great forum.
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Old 04-30-2011, 03:00 PM   #9
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Like someone said, check your trigger logs to see which trigger is missing and causing your engine to cut out. Might be one of your sensors is going dead?
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Old 04-30-2011, 04:13 PM   #10
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Definitely check the crank sensor's gap to the wheel teeth.. and that the crank wheel is tight. Might not hurt to check the cam sensor is tight too.
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Old 04-30-2011, 04:34 PM   #11
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Just got back home and I'm going to start swapping out parts. I'll start by checking everything again first. Then I'll swap in a spare CAS and crank sensor.

Here's a couple more logs also.
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File Type: zip DataLogs.zip (471.0 KB, 43 views)
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Old 04-30-2011, 05:23 PM   #12
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I'll check it out when I get back home. Someone needs to port TunerStudio to Android like yesterday.
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Old 04-30-2011, 05:35 PM   #13
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Ok, swapped the crank sensor (verified the wheel is tight also), cam sensor, tps and iac with known good sensors and the problem remains. Then I unplugged megasquirt and plugged back in the stock ecu along with the stock O2 and IAT. The car runs great on the oem ecu. This doesn't really tell me much, but I do feel confident in saying it most likely isn't one of the sensors. Plugged the MS back in and the problem returns immediately.
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Old 04-30-2011, 07:19 PM   #14
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Went through the entire harness and nothing appeared out of the ordinary. Unmounted everything and re-installed it back in the car and no change. Nothing appeared to be loose or out of place anywhere. Here's a couple more logs from my last drive. Any last ideas before I remove the MS from the car?
Attached Files
File Type: csv 2011-04-30_14.52.00.csv (1.02 MB, 61 views)
File Type: msl 2011-04-30_14.57.21.msl (64.4 KB, 62 views)
File Type: csv 2011-04-30_15.02.24.csv (349.5 KB, 47 views)
File Type: csv 2011-04-30_15.03.29.csv (158.1 KB, 54 views)
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Old 04-30-2011, 07:38 PM   #15
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Which firmware version do you have right now? I need to know to view the composite logs.
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Old 04-30-2011, 07:56 PM   #16
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Quote:
Originally Posted by Reverant View Post
Which firmware version do you have right now? I need to know to view the composite logs.
Same version that you sent it to me with.
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Old 04-30-2011, 08:01 PM   #17
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I thought you said you re-flashed it?
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Old 04-30-2011, 08:05 PM   #18
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I did, but it was the same firmware from what I was understanding. How can I actually check to verify this for you?
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Old 04-30-2011, 08:06 PM   #19
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When you open TunesStudio and you are online, the firmware version is on the titlebar. Post a screencap.
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Old 04-30-2011, 08:09 PM   #20
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He should be using pre 1.1 alpha 7 IIRC
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