VEMS no spark while cranking with low voltage

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VEMS no spark while cranking with low voltage

Postby chaloux » Wed Jul 12, 2017 10:44 pm

So Ross, the current owner of 4FOXSN8X, is having an issue where when he or the mechanic goes to start the car it won't start. He has some small parasitic draw that is lowering battery voltage past 12v and then he's getting no spark. Does VEMS stop sending spark after a certain voltage point? Can that be disabled?

Thanks dudes. I can't find anything online, or at least on my phone, that talks about this but I vaguely remember it being a thing.

Yes... I know a charger for ten minutes or a battery tender would "fix" the low voltage until the draw was found.
Matt

01 Allroad 6speed - RS4 clutch, catless downpipes, stuklr tune
04 Jetta TDI - DC stage I clutch/14lb fw
DEATH by rust - 96 Audi A6 Avant 2.5l TDI
GONE :( 87 4ktq - 4 FOX SNAKES
DEAD :( - 1996 S6 mit TDI
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Re: VEMS no spark while cranking with low voltage

Postby ringbearer » Wed Jul 12, 2017 11:36 pm

I don't know but you are a great car seller, still helping years later :)
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Re: VEMS no spark while cranking with low voltage

Postby chaloux » Thu Jul 13, 2017 6:08 pm

The answer is that NO this doesn't exist. Thumbs up.
Matt

01 Allroad 6speed - RS4 clutch, catless downpipes, stuklr tune
04 Jetta TDI - DC stage I clutch/14lb fw
DEATH by rust - 96 Audi A6 Avant 2.5l TDI
GONE :( 87 4ktq - 4 FOX SNAKES
DEAD :( - 1996 S6 mit TDI
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Re: VEMS no spark while cranking with low voltage

Postby carl » Fri Jul 14, 2017 4:40 pm

Won't spark or losing trigger signal?
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Re: VEMS no spark while cranking with low voltage

Postby 88a5tq » Fri Jul 21, 2017 8:10 am

Any chance you related the starter signal wire? I had this happen and it was the signal wire I ran that rubbed through on the axle and shorting out!
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