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Originally Posted by kero
(Post 1081511)
I, too, have the same issue.
MS1 v3 DIY built myself following the original thread. I am getting dropouts around 3.5k RPM, so basically highway cruising. I was able to follow the instructions pretty well to build the MS board as the picture tutorial was great. I tried to read the schematic but I am not 100% sure as I do not know symbols for everything. I used my mad MSPaint skills to add on to DIY's mod photo to show how I would solder in this 2nd opto circuit. Can anyone confirm that this is correct? |
Is there a different optoisolator I could use that I could source from Radioshack or Fry's? I tried searching 4N25 on their sites, but nothing came up
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Originally Posted by kero
(Post 1081658)
Is there a different optoisolator I could use that I could source from Radioshack or Fry's? I tried searching 4N25 on their sites, but nothing came up
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Originally Posted by mellowout
(Post 1081738)
I think there is a 4n25 already on the ms3.0 board. Not sure if you could use it or not.
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1 Attachment(s)
Originally Posted by duffbuster243
(Post 1081577)
Looks good, Just remove the original 2 resistors (Red Lines) that go from IAC1A to 5v and js8. I build my circuit on one of these: Dual General-Purpose IC PC Board : PC Boards | RadioShack.com and mounted it in the case.
That seems like a neat way to do it edit: https://www.miataturbo.net/attachmen...ine=1386811847 Parts list of what I just ordered |
My MS has been changed so much over the years I gave up on my sloppy proto area. I just recently used that radio shack board in an external enclosure and just popped the necessary wires out of my MS enclosure to use for VCCS Sucks, but it was the easiest way.
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Originally Posted by kero
(Post 1081880)
Is there enough room to mount one of those? (I'm using the stock DIY case)
That seems like a neat way to do it |
Originally Posted by duffbuster243
(Post 1082080)
Mine fit fine in the stock case. I cut the wafer in half though as you only need 6 slots of it for the 4n25.
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Originally Posted by kero
(Post 1082211)
How did you mount it? screws? doube sided tape?
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Wired mine in the proto area using kero's picture. just took it for a (short) drive down the road. Too soon to report no problems, but it runs, which is good.
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Nice. I will do mine this winter. I moved to a new shop last night. Driving on the highway @ 3400 for 20 minutes in 20*f weather it happened about 4 times.
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Originally Posted by mellowout
(Post 1082831)
Wired mine in the proto area using kero's picture. just took it for a (short) drive down the road. Too soon to report no problems, but it runs, which is good.
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I just installed my circuit. Still had the same issue occur on the highway. Could my igniter just be taking a shit?
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I've noticed that I'm still getting the misfire as well. I took a log and haven't seen an rpm spike but still had the stutter, albeit seemingly less often. I'll post my log up soon.
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Originally Posted by mellowout
(Post 1084525)
I've noticed that I'm still getting the misfire as well. I took a log and haven't seen an rpm spike but still had the stutter, albeit seemingly less often. I'll post my log up soon.
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I don't think 1.8s use igniters like 1.6s do. Correct me if I'm wrong. I'm going to try to post my log up tonight.
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Originally Posted by mellowout
(Post 1085043)
I don't think 1.8s use igniters like 1.6s do. Correct me if I'm wrong. I'm going to try to post my log up tonight.
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2 Attachment(s)
Here's my log
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Originally Posted by kero
(Post 1085045)
Yes and no. They are just built into the coilpack. I wonder if coils themselves could be weak. I think I will try upgrading to Toyota COPs
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Originally Posted by 240_to_miata
(Post 1085109)
I did that with no success. Still had misfire after.
CAS going intermittent? |
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