Electronic Boost control from unused wire in loom - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-13-2016, 09:57 AM   #41
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Quote:
Originally Posted by Barton View Post
The 1.6 has a few pins that go back to the ECU that you could use for the boost solenoid.

AFM Connector Pin
1 4P
2 4O
3 SG
4 4K
5 GND
6 GND
7 Fuel pump trigger

You can double check with a multimeter.

Could also use the purge solenoid wiring on 4X or the power steering switch wire on 1P.

How would you check this with a multimeter? Would I enable the switch in MS and check for 12v at the wire or is there another way?


I've currently got 4K pinned for my boost control source but the wiring diagram I linked shows that it's also used for the TPS. I also have my GM air temp sensor run through my AFM harness so those pins are also used.
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Old 02-13-2016, 11:30 AM   #42
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Not that I've ever heard of anyone having a problem before, but the DIYauto valve is only rated at 122f/50c.
put it inside your cold air box.


if you dont have one, youre dumb.
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Old 02-13-2016, 11:37 AM   #43
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Brain, what wire do you use for EBC in the AFM?
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Old 02-13-2016, 11:39 AM   #44
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Brain, what wire do you use for EBC in the AFM?
I use P for AIT, O for fuel pump, so that really leaves one...
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Old 02-13-2016, 11:41 AM   #45
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So how do you get K to work without interfering with the TPS signal?
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Old 02-13-2016, 11:41 AM   #46
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why would that interfere? do you have an automatic?
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Old 02-13-2016, 11:42 AM   #47
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They are connected at a terminal, according to the schematic I have.
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Old 02-13-2016, 11:43 AM   #48
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I don't have an automatic but I do have a VTPS hooked up there that I believe is using the 5v reference wire.
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Old 02-13-2016, 11:44 AM   #49
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look at the wiring diagram again. you have 5vref wired to 2N. you dont have an automatic, so it doesnt matter about 4K, that wire doesnt go back over to the throttle on your car.
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Old 02-13-2016, 11:46 AM   #50
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Does the red line not affect the TPS signal from the AFM connector and 2K on the ECU pin?

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Electronic Boost control from unused wire in loom-hqqmb14.jpg  
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Old 02-13-2016, 11:51 AM   #51
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Old 02-13-2016, 11:56 AM   #52
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Quality penmanship fo sho.

I cut my image off too early. :(

Thanks for the help.
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Old 02-13-2016, 11:56 AM   #53
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Old 02-13-2016, 07:23 PM   #54
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Old 02-14-2016, 11:31 AM   #55
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So I got everything in the car and moving. Setting up a decent target boost map was somewhat challenging. Open-loop stuff to start and I may jump into closed-loop PID settings later on.

Any input on torque curve? Load looks pretty linear and transmission safe to me. I may try to push this little 1.6L a bit harder in the future, but 12lbs pulls pretty good. Enough to make 1st gear somewhat useless.

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Electronic Boost control from unused wire in loom-mgkzjag.jpg   Electronic Boost control from unused wire in loom-8l4ayty.jpg  

Last edited by 90civichhb; 02-14-2016 at 12:31 PM.
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