MS3 Pro Sequential Injection + Coil near plug conversion thread
I was able to test all the coils, injectors, and the IAC using the built in test modes. All worked good. The spark sounded like a TIG welder.
Next I went to work on the cam and crank sensor. What they have you do is orient the distributor so the sensor pickup is basically right in the middle of the half-moon shape in the distributor. This is a different orientation than the stock 3.9/5.2/5.9 magnum orientation, but easy to achieve.
I then cranked the engine over and used the tooth logger in Tunerstudio:
Since it's a 36-1 wheel you want to see 34 normal teeth and one tall tooth, which is what you see here. The reason the tooth height is a little higher or lower is the speed changes a bit during cranking and I have a VR sensor on this engine. So this was good.
I switched over to the composite logger and looked for the cam sensor signal. No signal to be found. What it does is poll the cam wheel at the missing tooth to report the phase. After some testing I found that I was unable to get the +5V out when the metal "tooth" was inside of the switch (used a razor blade to test). So, it recommends installing a 1k ohm pull up resistor between the +5V feed from the computer and the signal wire. I had changed the connector to a weatherpack so I just soldered it on to the pins and fed the wire through the seal.
That fixed it, it switched immediately. The composite logger showed this:
The red pulses at the left are showing that it didn't see a cam signal yet. You can see it's showing the cam pulse in the green, meaning it polled the wheel and found a signal on every other crank revolution to know which stroke the engine is on.
I was able to test all the coils, injectors, and the IAC using the built in test modes. All worked good. The spark sounded like a TIG welder.
Next I went to work on the cam and crank sensor. What they have you do is orient the distributor so the sensor pickup is basically right in the middle of the half-moon shape in the distributor. This is a different orientation than the stock 3.9/5.2/5.9 magnum orientation, but easy to achieve.
I then cranked the engine over and used the tooth logger in Tunerstudio:
Since it's a 36-1 wheel you want to see 34 normal teeth and one tall tooth, which is what you see here. The reason the tooth height is a little higher or lower is the speed changes a bit during cranking and I have a VR sensor on this engine. So this was good.
I switched over to the composite logger and looked for the cam sensor signal. No signal to be found. What it does is poll the cam wheel at the missing tooth to report the phase. After some testing I found that I was unable to get the +5V out when the metal "tooth" was inside of the switch (used a razor blade to test). So, it recommends installing a 1k ohm pull up resistor between the +5V feed from the computer and the signal wire. I had changed the connector to a weatherpack so I just soldered it on to the pins and fed the wire through the seal.
That fixed it, it switched immediately. The composite logger showed this:
The red pulses at the left are showing that it didn't see a cam signal yet. You can see it's showing the cam pulse in the green, meaning it polled the wheel and found a signal on every other crank revolution to know which stroke the engine is on.
