beepee
how hard can it be?
- Joined
- Sep 25, 2008
- Location
- Southern MD
I have been working with MrBill on the 242, and we're itching to get this thing going. We are having a bit of trouble with the wasted spark however.
We've scoped the output signals from MS going to the two IN (IB1 and IB2) pins on the Hyundai ignitor (with the ignitor disconnected). We scoped using the output test mode in megatune. The dwell/interval settings were consistent with the pattern on the scope I noticed that the dwell period was only about 1 volt higher than the rest of the pattern.
Addidionally I found it odd that that with the motor stopped and the ignition on there _always_ about 9v when you meter from either of the MS trigger wires (from the D14 and D16 outputs) to the positive terminal (with the ignitor disconnected from megasquirt).
Another note: with the ignition on and the outputs attached to the ignitor, LEDs D14 and D16 are illuminated solidly. When you disconnect the ignitor, the LEDs go out. The LEDs stay illuminated during crank/test. If we disconnect the ignitor and do an output test, we get a very faint illumination from the LED. Even with the dwell and the interval set to nearly identical values the LED only illuminated dimly. (On the scope it appears that as the dwell / interval = duty cycle)
We are using MS2-extra 1.0.2, the ignition settings seem to be correct (not inverted, output pins, etc)
We have double checked grounds as well as tested the coil on another car. And we can't get this damn thing to spark....
I am thinking that something may be wrong/fried with/on either the MS mobo or the ignitor. I suspect the MS board.
What sort of voltage difference should we see in the signal? I figured it would be closer to 12v. I imagined that the ignitor expects to see at least a 5v jump before it starts it's magic, right?
I'd love to hear if anyone has had a similar issue.
We've scoped the output signals from MS going to the two IN (IB1 and IB2) pins on the Hyundai ignitor (with the ignitor disconnected). We scoped using the output test mode in megatune. The dwell/interval settings were consistent with the pattern on the scope I noticed that the dwell period was only about 1 volt higher than the rest of the pattern.
Addidionally I found it odd that that with the motor stopped and the ignition on there _always_ about 9v when you meter from either of the MS trigger wires (from the D14 and D16 outputs) to the positive terminal (with the ignitor disconnected from megasquirt).
Another note: with the ignition on and the outputs attached to the ignitor, LEDs D14 and D16 are illuminated solidly. When you disconnect the ignitor, the LEDs go out. The LEDs stay illuminated during crank/test. If we disconnect the ignitor and do an output test, we get a very faint illumination from the LED. Even with the dwell and the interval set to nearly identical values the LED only illuminated dimly. (On the scope it appears that as the dwell / interval = duty cycle)
We are using MS2-extra 1.0.2, the ignition settings seem to be correct (not inverted, output pins, etc)
We have double checked grounds as well as tested the coil on another car. And we can't get this damn thing to spark....
I am thinking that something may be wrong/fried with/on either the MS mobo or the ignitor. I suspect the MS board.
What sort of voltage difference should we see in the signal? I figured it would be closer to 12v. I imagined that the ignitor expects to see at least a 5v jump before it starts it's magic, right?
I'd love to hear if anyone has had a similar issue.