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Old 04-29-2009, 11:23 PM   #1
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Default Finally connected... no spark

So today i finally got connected to my megasquirt after almost 2 years of down time. Well i hooked up the wideband through the settings.ini Set my injector size and tried to crank. Well the car has been sitting for almost 2 years so i expected a little coaxing.

After figuring out it was getting no spark i,
Put gas in ( tank was empty )
Plugged back in CAS
Made sure the battery had juice
Verified Timing belt turns the cams

and now i am here...

The fuel pump is working im just not getting spark. Any sugjestions?
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Old 04-29-2009, 11:32 PM   #2
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Are you seeing an RPM indication in MegaTune while cranking?

Does the "cranking" indicator at the bottom of MegaTune light up while cranking?

Is fuel being injected?

How exactly did you determine that you have no spark?

In the "RealTime" window, what battery voltage is MegaTune showing you while cranking?
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Old 04-29-2009, 11:55 PM   #3
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1. Yes it says around 240rpm

2. Found it in the realtime display and yes it shows me cranking

3. Yes i can smell it and the fuel pump is on

4. Pulled out the coil and held the spark plug wire above the coil pack ( and left the side that goes to the spark plug in the cylinder) Ive done it before like that and got zapped so i know it works like this. Also did not have any extra plugs around.

5. bounces from 9-10 volts

Last edited by SKMetalworks; 04-30-2009 at 12:05 AM. Reason: found the "cranking" indicator
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Old 04-30-2009, 02:02 PM   #4
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Jump your battery. You're not turning enough RPMs during cranking. I had the exact same problem after my car sat for a few weeks during my turbo install.

Congrats on getting your comm issues fixed. What was the problem?
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Old 04-30-2009, 05:11 PM   #5
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Actually, 240 RPM sounds acceptable, and you seem to have covered the bases here.

With the key on, unplug the igniter and see if you've got +12 at terminal C, a blue wire. Also, unplug the coilpack itself and check that you've got +12 at the blue wire there.

If this a MegaSquirt or an MSPnP, and do you have access to a JimStim, or even better, an oscilloscope?

If not, with the igniter disconnected (and go ahead and disconnect the injectors to prevent further flooding) have somebody crank the engine while you test for the presence of +5 at either the brown or brown/yellow wires going to the igniter connector. These are the spark triggers, and they should be popping up to +5 for just about 6 milliseconds per crank revolution. A digital voltmeter may not have the response time to read this- if you can turn off autoranging and set it to a static range value that will help.
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Old 05-01-2009, 12:38 AM   #6
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Ignitor was bad!!! Thanks to everyone that has helped me through this. Matt and Justin at DIY Auto Tune and all of you on the forums that gave me advice. Really excited to get tuning swapped one from my other project and she fired right up. heres a link to youtube i recorded it for your viewing pleasure =)
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Old 05-01-2009, 12:41 AM   #7
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YouTube - SBK's greddy miata First Start

forgot to post youtubevid


EMBEDDED THE VIDEO FOR YOU

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Old 05-01-2009, 08:30 AM   #8
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needs more mufflerz.
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Old 05-01-2009, 09:43 PM   #9
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Quote:
Originally Posted by Braineack View Post
needs more mufflerz.

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