Well, I don't see any way to choose where the cam input comes in at, only whether or not to use a cam input. But, I did find this I/O list and it looks like the cam input is already at JS10. So, I disabled the tach output for now to see if I can get it to work, I can figure that out later. I'll try to fire it up again in the morning, god I hope it works this time...

 

ok, so I still have the same issue even with the tach output disabled. I looked at the voltage of the cmp and it is still 3.45V, if I disconnect the db15 connector it goes up to 3.75V, if I hook the 470 ohm resistor coming from 5v up to the other side of the 1k resistor I get 0.99V, if I don't hook the 1k resistor to anything though, and just hook the 470 ohm resistor straight to the PAD7 hole, I get 4.91V, I thought that was interesting so I did a datalog and cranked it over like that and I'm still getting no spark, no PW, and no RPM signal.

 

pic of how your board is built?

 

Also to clear up any confusion I've posted what the diyautotune circuit is doing.
Are you saying that when you cut js10 from the circuit you get a full voltage swing?

If that's the case then something from the point of that connection (likely the microcontroller) is still pulling down your signal.

Hang in there.

Edit 10k is a typo should say 1k

 

Board was built following the instructions in DIYautotune's write up. The two resistors going to PAD7 are not soldered in for these pics, I just desoldered them today while testing different things. All the orange wires are what it came with straight from DIYautotune (I bought an assembled MS, did not build myself).

 

With no resistor in between JS10 and Pad7, but the 470 ohm (not 470K) resistor hooked up between 5V and Pad7 I am getting either 0.05V or 4.91V at the CMP like I should be, tuner studio is still not showing an RPM signal and I'm still not getting any spark or PW to the injectors when it's hooked up this way.

 

Haha yeah 470k wouldn't work out so well...

So if you disconnect the microcontroller everything works as it should.
As long as that capacitor isn't fried and causing a short, the microcontroller is pulling your signal down...

This is likely a configuration issue within your ms2 settings.
I'm sure either Brain or the msextra forums could help you to get js10 configured to be an input.

 

Get the full TS and get a composite log of the triggers. Just because the voltage is right does not mean the signal is right. Besides you will love the extra functions like VEAL.

 

You don't need to use the full version of TS to post a composite log, only to view them. If you could upload a composite log of an attempted start, that would show what signals are making it through and what ones aren't.

 

here's the most recent start attempt

 

composite log, not datalog.

 

Two weeks later... Still nothing. I'm completely stumped. I bought the registered version of tunerstudio and megalog viewer, I found the composite logger but when I try to log anything I get nothing. I've tried the trigger logger and tooth logger as well. I am choosing a file to log to, clicking start, then cranking. Nothing shows up in the graph area at all. When I try to load the file into megalogviewer an error message pops and says "Data set empty." I read that it can take 15-20 seconds before it will start logging so today I went out, clicked start, waited about 45 seconds then cranked and I'm still getting nothing. I'm about ready to throw this megasquirt in the garbage and go back to band-aids, at least those let me drive my car.

 

Yeah but at least you have found your problem. Or so I would think. You have no triggers so you have no start. Now you need to figure out why.

Wiring issue, component issue, or software issue. Wish I had an answer for you.

 

Hey, im having a similar issue with my ecu. you ever figure out what the problem was?