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Old 11-09-2014, 01:05 AM   #226
malloy1
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Quote:
Originally Posted by Fivehundred View Post
Can you elaborate on this for the electronically challenged like me?

Does it work like this?

 photo Dummycoil_zpsb5ad7d52.jpg
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Originally Posted by Karl Buchka View Post
That's exactly how I did it. It's the same circuit that's listed on msextra.com.
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Last edited by malloy1; 11-09-2014 at 01:14 AM..
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Old 11-15-2014, 07:48 PM   #227
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Solved the problem about my NO TACH...it was due to a faulty J702T igniter...

I dug up my old spare, and swapped it in....tach works perfectly!

So, to confirm, the J702T will directly drive a Volvo tach....with no use of a relay coil or pull-up wire...but your J702T igniter has to work.
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Old 11-16-2014, 10:12 AM   #228
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Quote:
Originally Posted by Mylesofsmyles View Post
Solved the problem about my NO TACH...it was due to a faulty J702T igniter...

I dug up my old spare, and swapped it in....tach works perfectly!

So, to confirm, the J702T will directly drive a Volvo tach....with no use of a relay coil or pull-up wire...but your J702T igniter has to work.
Hello
Can you please post some pictures of the J702T setup in the car?
Would be nice to see it... :-)
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Old 11-16-2014, 09:24 PM   #229
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I can do that!
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Old 12-17-2014, 08:27 PM   #230
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Does anyone have or know where a I could buy the female connector for the j702t ignitor
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Old 12-17-2014, 09:45 PM   #231
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.
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Old 12-18-2014, 01:37 PM   #232
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So I got a board in the mail today from another tb'er, and I've got a harness built for my VAG coils, and ipdown's program to setup the dwell for these coils. Going in either tonight or tomorrow, but I gots a Q.
I'm going to keep my stock coil set up, and use a switch chip with stock setup, so if I need to I can just switch back to the dizzy if the need arises. Can I just use the switched 12v for the stock power stage for my coils, and split it between the two? Or if not, what's the best switched 12v to tap into?

Eh, looking at a diagram makes it seem like the stock power stage shares switched 12v with several others anyways, so I'll run it there.

Last edited by turbotankshane; 12-18-2014 at 09:24 PM..
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Old 12-19-2014, 10:51 PM   #233
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I got the board soldered up yesterday, and installed with coils today.

No start. Now the coil and dizzy were still in place, and the car will run if I just hook up the spark plug wires.

From the stock coil, I have a bright blue spark, and with those wires hooked up I have a thick, bright blue spark at the plug. With wasted spark coils hooked up, I have a weak, yellow spark.

I built the harness using AWG 16 wire for switched 12v and grounds, and 18 gauge for logic level spark outputs.

I tried with ground to engine block, and grounded to battery; tried with power from switched 12v at several different locations, and then just power straight from battery while cranking. No change.
I pulled the ecu back out and double checked solder. The board has 5v power and good ground; I believe the VR signal is good because if I swap the outputs I start getting fire 180 degrees out, engine speed picks up, etc. My balancer is off a little right now so I can't check with a timing light.
Measuring at the logic level outputs, I'm getting a signal but maybe it's not strong enough? Or maybe I just need to redo my harness.. I'm completely unsure and a little frustrated, I was ready for my car to fire off on those coils!
Help?
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Old 12-21-2014, 02:36 AM   #234
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Still no fire. So I rebuilt the harness with 10 gauge wire for the 12v and ground circuits, with the 10 gauge tied to the positive terminal and run through a relay that is controlled by switched 12v from the diagnostic port.
Then I tested resistance on the coils individually, and compared that to resistance from the connections to logic level outputs, and I have continuity through those circuits. So I tied signal ground to the EZK's internal ground, no change.
I tested the board with a DVOM, and I've got 5v to the board, and a good ground, which leads me to suspect the spark output. I believe it should be a 5v output, but I'm only getting around .3v to the board. I read here http://www.atmel.com/Images/doc7607.pdf that minimum output high voltage for the Atmega controller is 4.0v, so it should be sending 5v to the coils, but it's not.
So I think I might either a bad board or a bad solder to the spark output on the EZK; I'll check it in the morning.

So I looked and the IC on the board is attiny24a, and its dc characteristics are listed here

http://www.atmel.com/Images/8183_105.pdf

The attiny24a needs to see .6v to pull the circuit high if supply voltage is 2.4-5.5v; from the spark output, tested on either side of the resistor and at the wasted spark board, I'm only getting about .5v. The wasted spark board is outputting .3v consistently on both spark outputs. I don't think I'm going to get any fire out of that. Something strange is going on...

Last edited by turbotankshane; 12-21-2014 at 02:20 PM..
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Old 12-22-2014, 07:54 PM   #235
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It works!! Thanks to ipdown for helping me figure it out. Karl's board uses NPN transistors to switch the coils' path to ground; these VAG coils I'm using have to use PNP transistors to switch a 5v power feed. So I went to radioshack, got a few transistors (2n3096 I believe), a few 1k ohm resistors, and a small round pcb to mount them on.



I fed the spark output signals from the wasted spark board through the resistors and into the new PNP transistors, 5v through the emitter and then ran the output to the coils from the collector. Now Karl's board switches the path to ground for the PNP transistors, and those feed 5v to my VAG coils.



And after that whole mess, I had the leads coming out of the EZK box switched, so I was a little angry at first... switched the output leads and she fired right up!
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Old 02-08-2015, 03:06 PM   #236
RuneD
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Is it possible to order this "buchka boards" for volvo b230(fk) ?
I live in Norway..
PayPal is fine...
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Old 03-03-2015, 12:58 PM   #237
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Wondering if anyone has used MSD's Ford DIS 4 Tower Coil Pack Part No. 8241 http://www.summitracing.com/parts/msd-8241/applications
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Old 03-03-2015, 04:19 PM   #238
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https://www.youtube.com/watch?v=cJvJeE9d1v8

Assuming its someone on here
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Old 03-03-2015, 04:59 PM   #239
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Thank you!

Quote:
Originally Posted by turbotankshane View Post
https://www.youtube.com/watch?v=cJvJeE9d1v8

Assuming its someone on here
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Old 03-16-2015, 08:57 PM   #240
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So I'm assuming these boards are no longer available?
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Old 03-16-2015, 09:24 PM   #241
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Originally Posted by firefighter519 View Post
So I'm assuming these boards are no longer available?
Try bjilsma technical innovations if you can't get hold of Karl. They sell a board as well
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Old 03-16-2015, 10:04 PM   #242
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There's one on eBay right now!

http://www.ebay.com/itm/Volvo-240-74...cf398b&vxp=mtr
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Old 03-17-2015, 09:42 PM   #243
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For only 2.3x the original price
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I used paper books to learn how to do this stuff back in the day. Now I use pro software subscription
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3/4", make everything as heavy as possible for no reason. It's also 4:1 compression ratio because that's how cosworth did it in 1978.
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Old 03-20-2015, 12:19 PM   #244
pieterveenstra
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Just order a wasted spark PCB from BTI..

Good quality and the same price. And most important: items are in stock
The kit even includes a screw in plug




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Old 03-26-2015, 10:31 AM   #245
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Been looking for these boards as well,
but as earlier posts say the Bijlsma's kit is quite a step up in price.

Last edited by crassh242; 03-26-2015 at 10:39 AM..
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Old 03-26-2015, 10:45 AM   #246
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-Plug&Wiring loom, €45,00 including 21% Dutch Tax
-Wasted Spark PCB with connectors, €55,00 including 21% Dutch Tax

I ordered these, i tell when i got these. (already in transit)

I think thats nice price, with connector etc...
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Old 04-02-2015, 12:44 PM   #247
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Quote:
Originally Posted by puliukk0 View Post
-Plug&Wiring loom, €45,00 including 21% Dutch Tax
-Wasted Spark PCB with connectors, €55,00 including 21% Dutch Tax

I ordered these, i tell when i got these. (already in transit)

I think thats nice price, with connector etc...
I got these installed, nice quality!

Heres, some pictures:



I have to mod/bend little that coil connector to get 90 degree bend... (stupid hood )
Or just weld better coil bracket...

Its easier to buy better bracket from BTI... But i thinked i can do it...
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Old 04-10-2015, 12:16 AM   #248
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Karl​, Buddy READ MY MESSAGES

Ive been waiting over 6 MONTHS for my parts and you no longer respond to my messages?
Ive had to message people all over the forum to find out what the hell is happening.

Id like my parts Karl, Ive paid a LOT of money for this stuff and id like it SOON
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Old 04-14-2015, 10:39 PM   #249
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Ghettobird, buddy, stop posting the same **** in all of these threads, or I will ban you.
Use the feedback thread, or ask for help.
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I'ma have to go get me some juggalette strange
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Old 04-22-2015, 07:21 AM   #250
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The moral of this story is a lot of spoiled litte rich *******s, who have mommy and daddy cut checks for there whims don't care about people who work hard to pay there bills. Word is they moved to LA to bigger and better things for spoiled brats.
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