99 Ms2 No Spark While Cranking, Sparks in Test mode - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-30-2013, 03:23 PM   #1
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Default 99 Ms2 No Spark While Cranking, Sparks in Test mode

Hey guys so I'm trying to shoot down why my car won't start. I've got it down to not getting spark while cranking. I thought it may have been something going on with my cops but I just went through the output test mode and the coils fire that way. I switched the cam and crank sensors from my brother's nb and have had the same issues. Maybe some relay gone astray?? Thanks in advance.
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Old 04-01-2013, 10:32 AM   #2
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Do you get an RPM signal while cranking?
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Old 04-02-2013, 01:46 PM   #3
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No rpm jump while I'm cranking. Here's a quick datalog of trying to start:
Attached Files
File Type: msq CurrentTune.msq (89.0 KB, 62 views)
File Type: msl Miata Turbo Startup2.msl (42.4 KB, 57 views)
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Old 04-03-2013, 11:10 AM   #4
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Try making a composite log of an attempted start. This will tell us more about why you're not seeing RPM.

You won't get spark until the MS registers an RPM signal.
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Old 04-03-2013, 11:44 AM   #5
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Was the car running before and just stopped or did you change something on the car?

It's not hard for the crank sensor wiring to touch a belt and get chewed through if it's not secured, but if you're swapping sensors you've probably already checked that.
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Old 04-04-2013, 03:04 PM   #6
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Just tried getting a composite log but I couldn't get it to show any events at all. Tried the tooth and trigger as well but they are showing nothing while I'm cranking. And the car was running and while I was driving the engine slowly started to cut out once every minute and it just happened more and more frequent to where it was completely undriveable so I got it home and now it won't start. I changed out the cam and crank sensors and still no start..
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Old 04-04-2013, 03:05 PM   #7
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wait, this is the MS I just sent back to you?!
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Old 04-04-2013, 03:10 PM   #8
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Yesss.....
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Old 04-04-2013, 03:18 PM   #9
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what in the world? I didn't touch the cam/crank input wiring and that that was syncing great on my bench before I sent it back.

Is it possible you opened it up in your old TS project without first updating the new firmware I loaded and somehow corrupted it or something?

so you are able to connect to it no issues right now right? can you upload the msq thats currently loaded on it so I can take a look and see if something got messed up?

that doesn't make any sense!
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Old 04-04-2013, 03:23 PM   #10
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I updated everything like I was supposed to! And it connects and doesn't keep losing sync like before so at least that is a plus. Maybe I did mess something up though, who knows.. Here's my msq:
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File Type: msq CurrentTune.msq (89.0 KB, 52 views)
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Old 04-04-2013, 03:35 PM   #11
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well, losing sync and losing connection is two different things.

losing sync suggests the cam/crank signals are dropping out and the MS doesn't know the RPM and fails to spark.

losing connection means your laptop cant communicate with the MS.
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Old 04-04-2013, 03:39 PM   #12
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Ahhh ok. Well shouldn't the composite logger show something if I am getting any signal from the crank or cam sensors?
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Old 04-04-2013, 03:42 PM   #13
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it should. crank for about 15-20 seconds and save one out and attach.

I'm really confused as to why youre not seeing activity, I know I didn't move those wires, there was no need obviously, and I was syncing for hours on the bench.
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Old 04-04-2013, 04:15 PM   #14
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Just discovered a couple exposed wires after following my crank sensor. I think this may be my problem. I'll get back to you guys in a bit. Thanks a lot for the help!
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Old 04-04-2013, 04:17 PM   #15
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I was going to say...
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