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Old 03-04-2014, 06:13 AM   #341
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I think you'll have it sorted out shortly now there's a log. Stick in there. The last mile is the longest mile.
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Old 03-04-2014, 07:06 AM   #342
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Congrats!!!
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Old 03-04-2014, 08:37 AM   #343
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Here is another thought. You can't sell it because when you do, the next owner will figure it out and it will only take an afternoon.

Your only rational choices are figure it out or burn it to the ground.
How to Make Thermite: 8 Steps (with Pictures) - wikiHow
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Old 03-04-2014, 04:44 PM   #344
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There's a really simple way to check if the engine is otherwise ok: Stick a CAS on the exhaust cam, and drive the MS3 off that.

If the engine is OK, it will start, idle and drive fine, minus the VVT of course, but I imagine the car will sell a LOT faster if the engine starts and runs.

Time to install a CAS? 30-45 minutes. Add 15 minutes to connect the wires from the CAS to the adapter harness and you are good to go.
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Old 03-04-2014, 04:59 PM   #345
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^VLAD DO THIS.
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Old 03-04-2014, 05:03 PM   #346
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I think his ms3 is sold already :(
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Old 03-04-2014, 05:06 PM   #347
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Doesn't matter -- like he said, he won't have time to pull parts til this weekend, and he's willing to try easy things before then. He said if he gets it running, NOTHING will be sold. So if he keeps to what he said, then he can easily try what reverant recommended before pulling stuff to sell.
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Old 03-04-2014, 05:08 PM   #348
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Quick! Someone loan him a CAS!
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Old 03-05-2014, 09:07 AM   #349
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Potentially stupid question. Is there a way that signal interference from other wiring would "delay" the signal like what is seen in the logs? I know you can get something like that over very long distances, but I don't know if something else can cause it. Basically, even though he has continuity, and is getting signal, could it still be the wiring through some kind of interference? Should he try running the wiring completely outside the harness to the ECU with shielding?
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Old 03-05-2014, 09:14 AM   #350
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I don't know enough about most of this vvt stuff to be much help, but I do know that's not quite how the signals would work.

Electronic interference wouldn't really "delay" or retard the signal at all, it would just botch it and make it essentially "jibberish" to the car.

The reason interference causes a delay with like Internet connections is because routers check to see if the packet went through or if it got messed up, and if it got messed up it sends it again.. And again.. And again.. Every packet. So if every packet gets interfered with it essentially doubles transmission time.

Something like that wouldn't really apply here.. Unless an ecu acts similarly to a router in this regard, but I doubt it. But good thought.
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Old 03-05-2014, 09:49 AM   #351
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Quote:
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Quick! Someone loan him a CAS!
I mean I have a couple sitting at my house right now, I just don't think I could get one to him before this weekend in a cost effective manor.
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Old 03-05-2014, 10:04 AM   #352
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Call around and look for a reputable shop that can troubleshoot for a reasonable cost. Have the car towed to the shop and forget about it until they call you and tell you what's up. If they can't figure it out in a reasonable amount of time/cost, then consider selling it.

In the meantime, it's out of your hair and the stress is removed.
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Old 03-05-2014, 10:04 AM   #353
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Thanks a ton guys, I really appreciate you continuing to want to help out. But yeah fitting a CAS on there is not something I can make happen. There is no shop for me to take this to. People around here take their miata's to me. I fix all their cars lol. Never had an issue like this before, and no one I know in the area knows more about miata's than I do.
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Old 03-05-2014, 10:22 AM   #354
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I am trying to figure out how I can make a CAS PNP on a NB. The actual fitting it into the back of the head would take about 10 minutes so not hard. Figuring out how to wire it without messing up his stock harness is the hard part.
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Old 03-05-2014, 10:24 AM   #355
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The crank connection is easy, both sides of that connector are readily available. I dont know if the sensor side of the cam connector is available. You would just connect the signal wires to the right spots and pick the power and ground from whichever sensor you felt like. Probably just use the crank power and ground and connector and just stick a wire in the correct pin on the cam sensor connector, just to get the thing to start.
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Old 03-05-2014, 10:26 AM   #356
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Quote:
Originally Posted by shuiend View Post
I am trying to figure out how I can make a CAS PNP on a NB. The actual fitting it into the back of the head would take about 10 minutes so not hard. Figuring out how to wire it without messing up his stock harness is the hard part.
Our BP4W on our NA8 is running CAS on Megasquirt. But that's probably different because it's a 95 and had one to start with.
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Old 03-05-2014, 10:36 AM   #357
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Quote:
Originally Posted by Leafy View Post
The crank connection is easy, both sides of that connector are readily available. I dont know if the sensor side of the cam connector is available. You would just connect the signal wires to the right spots and pick the power and ground from whichever sensor you felt like. Probably just use the crank power and ground and connector and just stick a wire in the correct pin on the cam sensor connector, just to get the thing to start.
I have a spare CAS plug so that makes getting those 4 wires easy. I believe I have an old crank sensor that is broken, so I think I could salvage that for the power, ground, crank wires to make pnp. I do not remember off the top of my head if the plug for cam sensor is female or male. So I think I could get it to a point where it is just hooking one wire to the cam plug on the nb, and then be PNP other then that.
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Old 03-05-2014, 10:36 AM   #358
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Quote:
Originally Posted by shuiend View Post
I am trying to figure out how I can make a CAS PNP on a NB. The actual fitting it into the back of the head would take about 10 minutes so not hard. Figuring out how to wire it without messing up his stock harness is the hard part.
You don't have to make it PNP or even connect it to the stock harness, just run 4 wires from the CAS to the MS3 adapter harness.
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Old 03-05-2014, 01:17 PM   #359
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Quote:
Originally Posted by 18psi View Post
Thanks a ton guys, I really appreciate you continuing to want to help out. But yeah fitting a CAS on there is not something I can make happen. There is no shop for me to take this to. People around here take their miata's to me. I fix all their cars lol. Never had an issue like this before, and no one I know in the area knows more about miata's than I do.
So failing with this is not good marketing then
Just advance the intake cam gear one tooth and test, at least get a composite log of it (even if it runs).
If the VVT works it should be able to reach the same angles as before (you just have restricted the sweep 15 degrees).
With the about of training you now have, this would probably be done in under 30 min.
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Old 03-05-2014, 02:02 PM   #360
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Seriously, go find or buy an oscilloscope and debug this thing in 30 seconds. Use 2 needles and back probe the cam and crank signals right at the ecu.
Seriously.
"I'm too smart to let someone look at my car" but you don't even own a scope?
You're trying to debug this with stone aged methods. We're smarter than that.
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