MSefi.com read only forum (Jan.15,2018)

Check your battery?

I hooked an oscilloscope up to the ground of the coil and found that the issues with spark timing correlated to different traces on the oscilloscope. At 20 deg the scope showed three nice pulses which correlated to the ECU grounding the coil. At -5 deg the scope also showed the same thing. When I ...

Ok, so I think I have the double spark issue figured out. Apparently the engine receives a signal at TDC from the shaft encoder. Since the ECU doesn't know which TDC (combustion or exhaust/intake) it's really at, wasted spark is used so it fires at both TDCs.

I just got the new coil today and it ...

This isn't something I can easily verify. It's more of an inkling.

Let's start back with something that I've noticed was kind of botched together awhile back that was apparently never resolved. Under injection control, the parameters are set so that the MegaSquirt thinks there are two cylinders. I ...

Ok so I reinstalled the firmware and everything seems to be fixed. However, I think there is still an issue with how the spark is set up. I think the system may be set up incorrectly so it's firing once on the power stroke and then once 180 degrees out from that (end of exhaust/beginning of intake ...

MegaTune doesn't appear on the taskbar, just in the processes window.

I may try uninstalling everything and reinstalling MT. Do I need to back up anything other than the project files? (.msq files and the .ini files)

Also, what firmware should I install? Do I need 2.88 or can I use the most recent ...

Ok so I had the new coil driver soldered in and when I started up I got the following error (see picture). I know this is something to do with the firmware but I'm not sure exactly what I should do and would like to avoid turning the ECU into a brick. What should I do?

edit: I was checking ...

We're going to solder in another VB921 just to see if it solves the issue but would it be possible to swap in a BIP373 in the near future?

.MSQ File attached (limited to 3 attachments on the previous post)

Ok, so I spent some time searching around other threads and haven't yet found anyone with a similar issue so the troubleshooting continues.

1. I've attached a copy of the maps we use to run the engine although it's been the same one since August 28th (I made some minor fuel corrections a few days ...

Update: We just ran it again to see if we could narrow it down and it ran fine at an intake MAP of 70 kPa for 40 minutes. The second we increased the intake MAP to around 92-95 kPa the engine began to sputter out and the timing light showed that there was no pulse being sent to the spark plug. The ...

I didn't put this mess together but from what it looks like there is just a connection from the IGN terminal of the relay board to the negative terminal on the coil and then the fuel pump power (14.5 V) goes to the positive side. The fuel pump power comes from a power supply and then I'm assuming ...

We're using a MS-II and I'm not sure what code version. If anyone can help me figure this out it'd be much appreciated.

Anyways, I've posted here a few times before about issues with our test engine and you guys were really helpful so I'm hoping you can help me with our latest issue.

We were ...

Hello everyone. This is my first post on these forums. I have a decent understanding of EFI systems and tuning but the more I learn, the less I know.

Anyways, the test engine I'm using for my masters research is a single cylinder gasoline engine with identical cylinder geometry to the Ford Mustang ...