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

My dad and I have begun discussing some upgrades we want to do to our '73 Mercedes 450SL, which is currently equipped with a very rudimentary speed-density which operates on a very low pressure that we're not very pleased with in the least. I proposed replacing the old system with a modernized ...

I've wanted to convert this little '74 Alfa Romeo I've got to EFI for a while, because a 2000lb car with a 2L engine that gets 13MPG should not exist. I got a nice deal on some complete, really low mileage TBs from a 2009 Kawasaki ZG1400 Concours, and when they arrived yesterday I discovered they ...

I went to DIYAutoTune and picked up one of their premade 8' wiring harnesses, and when I was mapping it out and bundling wires together (injectors, sensors, etc), I noticed that there are some stiking differences between the diagram provided with the premade and the diagram on the megamanual.
Pins ...

Well what do you know, this is still here...
After some success and then re-failure, I've deemed something is seriously wrong with my K-jet system so I'm digging this idea back up and committing to it.
I've decided to use the Bosch EV6 style injectors and gone ahead and purchased a fuel rail from ...

Yes, it says PNP and NPN. I've tried it in both positions.

It is a normal stim.

Tried all the diodes installed in the input and output circuit. None of them elicited a response in Tunerstudio.

Yes, it is standard B&G.
I'm always wary of shorting things, lest they release their magic smoke. That, and I wouldn't know where to start. Input circuit (as diagrammed in the megamanual) I assume?

No sir, it's a by-the-book assembly. Nothing awkward sticking up off of the board.

Nope. All the other values work flawlessly except for the RPM.

This has been a problem since I completed the assembly. At first I thought it was a flaw in the stim since all the other values worked perfectly. Did a temporary hookup to the diagnostic port on my 1990 Mercedes (where a keyed +12v, ground, and coilNEG terminal exist), and not a twitch from the ...

So I've got a 1990 300SE that's got me fed up with its awful KE-Jet system, and I decided to EFI it with an MS1 v3 I had sitting around, piggybacking it on top of the original ECU, letting it control spark.
Now I've literally searched for hours, and one thing I cannot find is what kind of injectors ...

So after some follies with a bum computer in my Mercedes, I ended up with a spare Bosch #13146 O2 sensor sitting around on a shelf that will most certainly get destroyed before the one in the car goes belly up and I wanted to use it in my first megasquirt project (a little four-stroke lawnmower ...

Well, it wasn't so much the transistors at fault. I replaced all five of them and it still crashed the laptop. I went and tried it out on my PC (with a built in COM port) and it works fine. I can tool around with the Stim and all except the RPM value work. I suppose this means that PC card is going ...

It was a good old case of an ID:10T error. I took a close look at the megamanual and at the board and discovered *drum roll* that I had install all five transistors backwards. Excuse me while I go bash my head into the wall.

Whoops, forgot about this. Busy, busy, busy.
Got a couple questions to help troubleshoot this:

1. Does this problem happen only on the car, or also on the Stim?
2. Are you using a USB adapter?
3. When was the last step you were able to connect successfully?
4. What firmware are you running?

Let ...

I just finished assembling my first MS v2.2 kit (after building the simulator kit), and although it tested flawlessly during every test step through the assembly, now that it's complete, if I plug in the serial connection to my laptop (with power applied to the ECU), the laptop completely locks up ...