Finally connected... no spark
04-29-2009, 10:23 PM
#1
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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?
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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04-29-2009, 10:32 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?
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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04-29-2009, 10:55 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
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; 04-29-2009 at 11:05 PM. Reason: found the "cranking" indicator
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04-30-2009, 04:11 PM
#5
Boost Pope
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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.
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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04-30-2009, 11:38 PM
#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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