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

Back again, one more time. I was still having some issues, although different, and was pointed toward "injector data". So I rigged up a test rail on my engine, and tested my injectors. Come to find out, 3 of them were only flowing about 2/3 of what they were supposed to be. So, I sent them off and ...

I forgot to add the reason I thought the problem was intermittent and depended on rebooting the ECU... Since in my configuration the ECU does not know where the engine is at in its cycle, the timing of the injection events is started from the first time the ECU picks up the tach signal. I think that ...

I also had a problem that sounds like it is similar to what you describe. The MSnE modification seemed to help it quite a bit, but vary rarely it would still pop up. I never did solve it. If you search my profile you will see I have a thread about the problem I was having. I am now switched over to ...

Ok, I just wanted to update this. It seems like 95% of the threads I read just drop off with no solution, so I wanted to say that I found the problem.

It seems to have been that I had the four injectors paired up side to side on my throttle body. I switched them so that they are paired up corner ...

I have a MS-II v3.0 running 2.92 code. It is on a gen-1 small block Chevy, I have a FAST TBI unit sitting on the intake, 14point7 O2 controller, and am running Ford EDIS ignition.

I have just recently switched to EDIS to work around a timing issue I was fighting, and the 14point7 is also new at ...

Everything helps! I have concerns about it too, it just seems like sometimes I worry too much about stuff that doesn't matter, especially when I don't really know much about it. Never hurts to ask those who have been there before.

I made what I think is a sweet bracket last night that bridges the ...

I am in the middle of changing my small-block chevy from an electronically controlled HEI system to EDIS-8. I was planning on building a bracket to mount the new coils AND the EDIS module on the back of the motor where the distributor used to be. I got to worrying about having the EDIS module too ...

I stumbled on that little tidbit about the RPM earlier, somebody somewhere on the interwebs said the EDIS module will only work below 6250? Like you said, I don't need to go that high, so it would probably work fine for me. I will PM you.


Thanks!

After I posted yesterday, I got to researching, and the Ford EDIS method seems to be a pretty sweet way to go, and affordable...

Now I wish I would have opened my eyes and realized it before I went down the road I am on, lol. Just seems like a better way to go all around, makes me wonder why I ...

I had just about decided that it was ok. All my Google results seemed to indicate that what I was seeing was pretty normal.

Not real sure what to do next. Kinda at my witts end with this thing. Tempted to get an aftermarket distributor if i could ever decide on a brand, but everything I read says ...

Tinkering with this thing again today.... Fixated on the VR sensor, I decided I would twist and shield the wires to see if it changed anything... I twisted them, wrapped them in tin foil, then wrapped that with a lead that I could ground, and put heat shrink around the whole thing. Grounded it with ...

I swapped the VR sensor wires tonight, I'm not really sure what to make of the results.... The timing retards smoothly as RPM increases as if the computer is controlling it, but it retards whether or not I have the 5V connected to the B-pin. Before, the timing would advance when the computer would ...

I will try that John, thank you!

This motor is a practically brand new chevy crate motor with less than 20k on it easy. I suppose anything is possible though. Know of an easy way to check without pulling the timing cover? I figure I could move the crank back and forth by hand and see how much crank movement it takes to move the ...

Well, I tried everything I mentioned above, no change at all. I've messed with distributor gear endplay, changed the distributor, changed the coil, removed the connection between the ECU and the distributor except for the tach signal, ran new wires from the + and C pins on the module to the coil ...

Thank you for the idea John, I will throw that on my list of things to try.

So I've been thinking, and reading, trying to figure out just how I am going to figure this out.... The coil is what's providing the spark, so what's causing the magnetic field in the coil to collapse at times other than when it should be...

One thing that came to mind is that the only thing ...

Here are some datalogs from over a month ago. I had originally posted them in the thread about my throttle position problem, but nobody had anything to say about them. I think my advance table is different than the tune I posted above, so I have attached the tune that was in place when I got these ...

I have an MS-II v3.0, 2.920 code. It is on a Gen-I small block Chevrolet 5.7L. I have also done the MSnS-E Modification. The distributor is a stock GM unit with the small cap, external coil, and 8-pin module.

When looking at my timing with a timing light, it jumps about 8* as I slowly bring the ...

So, I figured maybe the best way to check my sensor readings was to get a datalog during a series of ECU power cycles without starting the engine. Does that sounds reasonable? Since it seems like my problem comes and goes with ECU power cycles I thought I might see an inconsistent sensor reading ...