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Old 07-27-2009, 08:25 PM   #1
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Default MS1 spark is gone ???

listers,

After building my own MS1 with LC-1 and AFM delete in preperation of a turbo the car ran fine, i just started to do some small logs and wanted to do some more extensive logging.
I then read the improved spark output driver circuit update by joe, well this was a great update and i bought the necesary products. Started soldering and had everything the way it should be.
Car started right up without the nasty burble but after running 2 / 3 minutes it just died........ started it and ran fine............ for 2 / 3 minutes (spark inverted to yes).
So today i soldered the original wiring in again, started the car and now it doesn't want to start at all.
I traced it back to the spark output (sparkplug to ground no spark, pnp spark yes), switched it for a local PNP and that fired right up.
Do any of you know what to do ?? what should be checked? what should i do?

Thanks in advance!

tony
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Old 07-27-2009, 08:42 PM   #2
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So today i soldered the original wiring in again, started the car and now it doesn't want to start at all.
I don't understand, did you revert back after doing joe's mod?
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Old 07-27-2009, 09:23 PM   #3
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hello Braineack,

Yes you are correct, i needed the car today so i soldered the joe wiring out changed the spark inverted to no, and soldered the normal mod in again.
I even tried two times with different resistors but no luck.
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Old 07-27-2009, 09:50 PM   #4
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but if it worked, then why did you go back? you musta' reverted incorrectly, pics help.
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Old 07-27-2009, 10:03 PM   #5
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well that is just the problem the mod worked but it didn't, car started but died 2 minutes later this just repeats when you start the car again.
I bought new npn transistors wired it up a second time and then the car wouldn't start up anymore, i then wired it up for the situation before the mod but it won't start.
The only thing i can think of is that i desoldered something, so i got my multimeter and probed the wires and everything in the area i could have touched. But i cannot discover anything...
MS1 is back to normal so a picture wouldn't help would it ??
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