COP Thread
10-31-2013, 01:05 AM
#1681
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Just a data point - my car ran (genuine used Toyota) COPs fine with the stock 99 ECU for about 500km of street use then developed an occasional miss. I've now switched to an Adaptronic and I am running the correct dwell but the miss persists. I haven't yet swapped out the coils but I suspect they are the issue.
All the crimps on the COP loom look secure.
All the crimps on the COP loom look secure.
Also, the car idled way smoother on the cops than it did on the factory coilpack, even on the stock ECU.
Last edited by EO2K; 11-10-2013 at 09:57 AM.
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11-09-2013, 11:19 PM
#1684
This is what I had but never liked it. U have to scroll down a bit
DIY Stud of the Month -- DIY Tips and Tricks
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11-10-2013, 03:40 AM
#1685
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Join Date: Nov 2011
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Ok guys... I just completed a hack that gave me plug and play for my 95M. It isn't quite the elegant solution I originally envisioned, but it let me avoid tearing into the OEM coil harness.
Somewhere in this long 85 page thread, a lone voice asked one simple question that seemed to get overlooked in the heat of the ongoing discussion. I'd honor the name of the poster, if I could only find the post again, He certainly deserves full credit for the idea. The question (paraphrased) that he asked was, "Has anyone tried using a TPS to make COPS plug and Play?"
This idea stuck in my head because I too had noticed the shape of the connection was very similar to the coil connection. So when I picked up a used set of Toyota Matrix coils, along with a full ignition harness, I also grabbed a couple of Toyota TPS modules. These are the same as the ones used on 94 and 95 NA's, but Toyota used millions of them so they were cheaper.
Once the TPS is gutted, you have 4 perfect pins for soldering. The plug will not fit the Miata coil harness plug without a bit of modification, but the 4 external pins are a perfect match. It require removal of the plastic shielding surrounding the pins in order to accomplish a good connection. I'll have to use electrical tape to secure the mating, but it works quite well from all indications.
The car fired up first try and idled smoothly. It was too late for a test drive, but that will happen once I tidy things up and tie the coils down. Plug and Play is possible, even if the fix is less attractive than the hoped for direct connector match.
Steve
Somewhere in this long 85 page thread, a lone voice asked one simple question that seemed to get overlooked in the heat of the ongoing discussion. I'd honor the name of the poster, if I could only find the post again, He certainly deserves full credit for the idea. The question (paraphrased) that he asked was, "Has anyone tried using a TPS to make COPS plug and Play?"
This idea stuck in my head because I too had noticed the shape of the connection was very similar to the coil connection. So when I picked up a used set of Toyota Matrix coils, along with a full ignition harness, I also grabbed a couple of Toyota TPS modules. These are the same as the ones used on 94 and 95 NA's, but Toyota used millions of them so they were cheaper.
Once the TPS is gutted, you have 4 perfect pins for soldering. The plug will not fit the Miata coil harness plug without a bit of modification, but the 4 external pins are a perfect match. It require removal of the plastic shielding surrounding the pins in order to accomplish a good connection. I'll have to use electrical tape to secure the mating, but it works quite well from all indications.
The car fired up first try and idled smoothly. It was too late for a test drive, but that will happen once I tidy things up and tie the coils down. Plug and Play is possible, even if the fix is less attractive than the hoped for direct connector match.
Steve
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the connector off a dead NB coil pack. Its not super pretty, but should give a good connection. I've not assembled it yet so no pics heh.
11-11-2013, 11:22 AM
#1688
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I was under the impression the coil side 4 pin connector was not actually available anywhere, or did you buy the TPS one? Got a link? It will probably be prettier than my sodoff coilpack connector mess
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11-11-2013, 11:26 AM
#1689
The coil side connector is easy IIRC. But I used the 6 pin connector that connects the entire coil harness to the car (because the coil harness is a sub harness). That 4 pin coil connector is a standard connector with a mate, but I cant confirm that because I cant open the google doc with all the connectors at work. To test, if the coil pack connector plugs into the CAS then there is no mating connector available.
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