Pit Crew
Wasted Spark fitting instructions?
Does anyone have a PDF of the Motorsports Developments wasted spark kit fitting instructions?
Got my ecu in front of me ready to fit the driver board and realised that I've lost the paperwork for it!
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Pit Crew
Re: Wasted Spark fitting instructions?
Got a replacement PDF install guide from MSD. Driver board now installed in ecu
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Spanner Monkey
Wasted Spark fitting instructions?
Hav u got this wasted spark sorted any probes with the Rev counter ?
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Pit Crew
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Spanner Monkey
Wasted Spark fitting instructions?
Cool my rs2000 Rev counter works as is but still hav strange misfire occasionally when just cruising along but it's ok when booted 🤔
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Spanner Monkey
Wasted Spark fitting instructions?
The misfire was caused by my Rev counter connected to the md circuit board for wasted spark :-) disconnect the Rev counter pin 9 or 21 I think and runs fine now so will make up the diode cct and run it from the coil pack side :-)
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Spanner Monkey
Wasted Spark fitting instructions?
Diode cct only works to 1200rpm then dies lol
May add few resistors cos I think the -ve pulses are not going low enough to fire the Rev counter 🤔
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Spanner Monkey
Wasted Spark fitting instructions?
It worked but needs refining 🤔
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Bodger
Re: Wasted Spark fitting instructions?
Just fit a 10k resistor across the rev counter connections on the back of the dash, this will get rid of the rev counter going nuts. You don't want or need any resistors inline between your diodes and the rev counter.
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Spanner Monkey
Wasted Spark fitting instructions?
Between Earth and the signal from the coils then u mean cheers
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Spanner Monkey
Wasted Spark fitting instructions?
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Bodger
Wasted Spark fitting instructions?
Mine was like this, sorry, was a 5k resistor I used, not 10k
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Spanner Monkey
Wasted Spark fitting instructions?
Ok thanks was that running msd wasted spark with 2 diodes connected together to get a single output connected to Rev counter cheers
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Bodger
Re: Wasted Spark fitting instructions?
Yes, exactly as you have your diagram with the two diodes and one zener. I had the exact same issue as you, rev counter would work, but as soon as it went over 2k it would go funny, then just drop to nothing.
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Spanner Monkey
Wasted Spark fitting instructions?
Thanks for that will giv it a try :-)
Cheers 😁
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