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Old 10-16-2019, 11:01 PM   #501
nitroboie
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Originally Posted by chirish1234 View Post
also, ran it hard last Wednesday and came back to find out cyl 2-3 had stopped firing. ohmed out my wire harness and everything checked out. going to take the board apart and see if a connection broke or something. has anyones board failed on this way?
Haven't had a board failure in either of my two installs.

The only failure I've had was when the crimp on the 12v for my coil pack broke when I floored it to get away from traffic, yeah... That was embarrassing.

Hope you find out why you're down a bank.
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Old 11-02-2019, 08:26 PM   #502
bugjam1999
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Hi all,

So I managed to desolder and detach one of the solder pads from the wasted spark board... damn. Thought I was better at soldering than that. Too much heat I guess, although i wasnít attempting to attach a huge gauge wire so I didnít have the soldering iron tip on the wire and pad for long.

Take heed of my tale of woe and be extra careful soldering!

Suppose Iíll order another. Perhaps after a beer.

Cheers
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Old 11-02-2019, 11:35 PM   #503
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Originally Posted by bugjam1999 View Post
Hi all,

So I managed to desolder and detach one of the solder pads from the wasted spark board... damn. Thought I was better at soldering than that. Too much heat I guess, although i wasn’t attempting to attach a huge gauge wire so I didn’t have the soldering iron tip on the wire and pad for long.

Take heed of my tale of woe and be extra careful soldering!

Suppose I’ll order another. Perhaps after a beer.

Cheers
Have that beer, but then PM me your name & address and I'll send you a replacement board, on the house. I'll just ask you to cover shipping. Mistakes happen!
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Old 11-03-2019, 03:43 AM   #504
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Have that beer, but then PM me your name & address and I'll send you a replacement board, on the house. I'll just ask you to cover shipping. Mistakes happen!
Wow- thatís unexpected and really nice of you!

Cheers!
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Old 12-28-2019, 04:33 PM   #505
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I've beat my head against a wall for 3 weeks+ and can't figure it out. I honestly don't know (some say yes) that this issue is even WS related.

Here's the nonperformance thread.
https://forums.turbobricks.com/showthread.php?t=352545

It's pretty long so here's the important stuff..

Car is a 1990 745 lh2.4 16t Buchka wasted spark conversion board installed ~2years ago, miata igniter, bosh 2x2 coil pack, NPR IC, injectors are currently green giants JUST to rule out leaking injectors, normally run t5 injectors. 954 ecu and ezk are chipped from sbabbs.

Car won't start after long sits in colder weather. First start of the day depending on how cold it is will vary from 10min to an hour and a half...but it will eventually start. After the first warm up, car starts everytime without hesitation, even after 4ish hour breaks in colder weather.

Ive tested and replaced so many things...I've come up with nothing.

My question, how do I confirm the WS spark board is performing properly and my connections from the board are okay? I have checked for continuity in all my connections in the engine bay, but I'm unsure how to test other parts of the system. I have visually inspected all connections from the ezk board to the igniter, but come up with nothing.

It seems all my electrical testing are limited to when the car won't start...as soon as it starts, it will not repeat symptoms till the following morning.
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Old 12-28-2019, 05:28 PM   #506
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Originally Posted by Mbeas96 View Post
I've beat my head against a wall for 3 weeks+ and can't figure it out. I honestly don't know (some say yes) that this issue is even WS related.

Here's the nonperformance thread.
https://forums.turbobricks.com/showthread.php?t=352545

It's pretty long so here's the important stuff..

Car is a 1990 745 lh2.4 16t Buchka wasted spark conversion board installed ~2years ago, miata igniter, bosh 2x2 coil pack, NPR IC, injectors are currently green giants JUST to rule out leaking injectors, normally run t5 injectors. 954 ecu and ezk are chipped from sbabbs.

Car won't start after long sits in colder weather. First start of the day depending on how cold it is will vary from 10min to an hour and a half...but it will eventually start. After the first warm up, car starts everytime without hesitation, even after 4ish hour breaks in colder weather.

Ive tested and replaced so many things...I've come up with nothing.

My question, how do I confirm the WS spark board is performing properly and my connections from the board are okay? I have checked for continuity in all my connections in the engine bay, but I'm unsure how to test other parts of the system. I have visually inspected all connections from the ezk board to the igniter, but come up with nothing.

It seems all my electrical testing are limited to when the car won't start...as soon as it starts, it will not repeat symptoms till the following morning.
You can scope the 1-4 and 2-3 output signals from the wasted spark board, into the igniter module. If you see a signal there at 2x engine speed frequency on both channels while cranking, then the WS board is likely not your issue.
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Old 12-28-2019, 05:39 PM   #507
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Originally Posted by Duder View Post
You can scope the 1-4 and 2-3 output signals from the wasted spark board, into the igniter module. If you see a signal there at 2x engine speed frequency on both channels while cranking, then the WS board is likely not your issue.
Awesome. Looks like I'm finally getting a oscilloscope and learning how to use it. Thank you sir.
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Old 12-31-2019, 07:39 PM   #508
fridazadilak
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Spending New Year trying to figure out the electrical gremlins with fitting this wasted spark kit.

Got a 93 240 with a Buchka board, Bosch 2x2 cool and J702T ignitor.

Issues...The ignitor gets hot when cranking to check for spark. Like hot enough to cause a blister on my finger after cranking it for one second.

Then there's no spark when cranking, but when the ignition is on position 2 you get random sparks across all for leads.

Finally, the sparks still continue after the ignitor is removed (and I melted a work glove in the process of remove the ignitor).

Any ideas?
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Old 01-02-2020, 01:34 AM   #509
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Originally Posted by fridazadilak View Post
Spending New Year trying to figure out the electrical gremlins with fitting this wasted spark kit.

Got a 93 240 with a Buchka board, Bosch 2x2 cool and J702T ignitor.

Issues...The ignitor gets hot when cranking to check for spark. Like hot enough to cause a blister on my finger after cranking it for one second.

Then there's no spark when cranking, but when the ignition is on position 2 you get random sparks across all for leads.

Finally, the sparks still continue after the ignitor is removed (and I melted a work glove in the process of remove the ignitor).

Any ideas?
My initial reaction is: it sounds like a short. Have you checked for shorts with a continuity tester or multimeter?
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