MS3PRO EVO on 4th Gen 3sgte Options

[HardHead93]

I just got my MS3PRO EVO in for my conversion to standalone on my 4th gen 3sgte. I am planning on taking my time with this install to make sure all the wiring is correct and clean looking. To help with the install I grabbed a 5sfe ECU and mounting hardware out of a junkyard car to use as a template for mounting the Megasquirt into the car.









Got relays, distribution blocks, and different color wiring for a clean centralized install.




My goal is to wire the ECU up for as many features as possible and once I get good tune running, start enabling the features. I spent the last few days reading the instruction manual and it has me excited with how much it can do.

This post has been edited by HardHead93: Sep 8, 2017 - 8:15 PM

[HardHead93]

I can't seem to get rid of this cam sensor fault. I have tired to ground it in multiple locations and I am still getting a lot of noise on the cam signal. It is like it is picking up the crank signal as well as the cam signal. When I ground it with the crank sensor the car will at least rev to 5000 rpm before I lose sync. All other grounds start giving me problems at 2500 rpm. I think I will need to start messing with the noise filtering function in TunerStudio.

[HardHead93]

I can't seem to get rid of this cam sensor fault. I have tired to ground it in multiple locations and I am still getting a lot of noise on the cam signal. It is like it is picking up the crank signal as well as the cam signal. When I ground it with the crank sensor the car will at least rev to 5000 rpm before I lose sync. All other grounds start giving me problems at 2500 rpm. I think I will need to start messing with the noise filtering function in TunerStudio.

After messing with some of the noise filtering settings and taking the 10k resistor off the camshaft sensor wire, I was able to get a cleaner signal. The data logs are showing the single tooth on the cam hitting like it should but their is still a little noise. Tomorrow I will take the car for a drive and mess with the filtering settings to see if I can get a clean signal.

[HardHead93]

I can't seem to get rid of this cam sensor fault. I have tired to ground it in multiple locations and I am still getting a lot of noise on the cam signal. It is like it is picking up the crank signal as well as the cam signal. When I ground it with the crank sensor the car will at least rev to 5000 rpm before I lose sync. All other grounds start giving me problems at 2500 rpm. I think I will need to start messing with the noise filtering function in TunerStudio.

After messing with some of the noise filtering settings and taking the 10k resistor off the camshaft sensor wire, I was able to get a cleaner signal. The data logs are showing the single tooth on the cam hitting like it should but their is still a little noise. Tomorrow I will take the car for a drive and mess with the filtering settings to see if I can get a clean signal.

So after almost taking the Megasquirt out back and putting a bullet in it, I figured out how to get a clean cam sensor signal. I ended up doing some digging and found that the VVTi 2jzgte guys were having the same problem with the MS3PRO. They were saying that the cam and crank circuits on the MS3PRO is wired differently than the MSX and Microsquirt. That meant if you had an older generation Megasquirt you would most likely not run into this problem. They were having the same symptoms, a clean cam signal until about 2000 RPM then it would start picking up crosstalk distortion from the crankshaft sensor and eventually the ECU would lose sync. How they fixed the problem was the following:
The NE+ goes to the CKP+.
The G+ goes to the CMP+.
The NE- is wired into the CKP- and CMP-, also the you need to jump the NE- to the sensor ground to clean up the signal.
Finally you need to splice the 1k ohm resistors that come with the MS3PRO EVO from the CKP+ to NE- and CMP+ to NE-.

I gave that a shot and like magic the cam and crank signals were now clean with no cross talk at higher RPM. Occasionally I will get a cam sync error on TunerStudio but it must be bogus because it never seems to affect performance. When I see that cam sync error, kill and restart the car the error goes away. It makes sense because from what I have read the 2jz is based off the 3s design and the gen 4 ignition system is similar to the VVTi 2jz ignition system. You could almost say the 3s is the 2jz's older (but smaller) brother. Toyota is good at reusing their technology on different cars within the same time period. I can't believe how long I spent messing around with just 1 WIRE trying to get this thing to work.

This post has been edited by HardHead93: Feb 17, 2019 - 10:39 PM