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

You have to tune fuel with the VE table. The AFR table is for ego correction which by default only corrects up to 10% (I think).

/Carl

I still have the issue of 45k, but I changed switched polarity on my VR sensor and got a much better RPM signal. Either the picture of what was + and - on a ford sensor was wrong, or I was just stupid at the time of wiring it all up :)

Recharging the battery ones again... will try starting again ...

The pot has a total of 100k resistans. So, when I had it off the board, I see 100k between the middle pin and the top pin, and 0 on the lower. If I change to 50k, I have 50k on both sides. But when I put this on the board, I see 45-50k on the top one, and 0 on the lower. Hope that makes sense. It ...

R53 shows 9,89 kohms on my meter.

Playing with R56 did not help at all. When cranking my engine I sometimes see RPM spikes, but nothing constant at all. Still works fine on the stim.

/Carl

I will try tuning R56 a bit.

But that still does not explain why I do not have 100k on R52. I even replaced R52 and still get 45k on that one. Off the board, both pots show 100k, so somewhere on the board, I loose 55k ohms?!

/Carl

Doesn't help. I get a nice linear decline of resistanace from around 45k down to 0.

I am going to go buy a new pot and see if it works better...

/Carl

Board: 3.0
processor: MS-II

I am trying to get my engine started today. I thought I had a good RPM signal, but I didn't, so I found this guide to tune the pots for VR sensor:

Adjusting R52;
With MS 'OFF', Using digital multimeter;
poke -ve test lead at pin1 of U7 and
+ve test lead to pin 3 of U7 ...

400 Hz seems impossible since you can only put the multiplier to 8 x 30,5. But it is a lot quieter at that setting!

Now all I got to do is get a good signal from my VR sensor and then I am going to try to start this thing

/Carl

Thanks! I'll give it a go this weekend.

/Carl

I just hooked up my PWM valve and it hums back at me. It is a honda valve from a b16a1. If I increase the frequency the hum is less audible. How do I figure out what frequency my valve works at? Is huming bad? Can the wrong setting kill my valve?

/Carl

Interesting. What's he spraying with the second injectors? Alcohol, water, fuel? Just curious. :?

Fuel. They start spraying at 4800 rpm and merges out the ones near the head. Found this on www.jenvey.co.uk site:

Where is the best place for the injectors?
Where one injector is to be used per ...

I found this in another forum. This guy merges the secondary injectors in the airhorns over 4800 RPM.



/Carl