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

Update. I downloaded and installed v2.920 and tuner studios ( big thumbs up so far). So far my rpms are looking good after the update. Must have been a glitch in the older version.

Hey Ken. Thanks for the reply. I know the stuff is dated. I pulled it years ago then recently decided to put fuel injection back on. Already had mega tune and my ini files Etc ready to go. That being said tonight I will be installing tuner studios and 3.3.3? tonight. The low cranking rpm was an ...

Maybe I should clarify. The motor runs ok. Idles ok at approx 850-900 rpm but in mega tune it shows me idling at 350-400. And the injectors on my tbi are high impedance.

Did a EDIS conversion and everything worked great. I then switched from a MPI to a TBI setup and now my rpm's are about half of actual. i cant figured out what it could be. The only changes I made were to the fuel settings. Any help would be greatly appreciated.

Chevy 4.3L V6
EDIS 6
MS II PCB 3.0 ...

i dont know..i guess the idea of adding fuel here to fix a problem with fuel being taken out from there. but if that is what i need to do then its fixed ;)

thanks again Matt.

Vic

thanks for responding Matt. thats basically what i have done..it just seems like a band aid fix though..but its working.

thanks

also, my IAT based fuel correction table it zeroed out.

sorry..i forgot to mention... MSII 3.0 mainboard running v2.889 im pretty sure. i have looked everywhere trying to figure out how to disable it to no avail.

How do you disable the gamma E as it relates to the IAT temps? it seems everytime it gets hot (IAT) the gamma e pulls fuel...up to 85% which causes a very very lean condition (afr 18:1). i have it currently setup to run with no O2 corrections so when the gamma e pulls out fuel it is un drivable. i ...

oh geez...im an confused person. i had my rev limiter set at lower 5500 and high 600 rpm with 12 deg ign retard as the limiter.

i just swapped out the junkyard ignition module with the new ebay distributor ign module thinking...hoping it was a bad module but it is still doing the same thing with both ignition modules.

MS II 3.0 2.905

i finally got my motor fired up with a junkyard distributor. it had a rough idle so i data logged it and for some reason the timing is jumping erratically back and forth from 15.8 to 3.8 When i watch the timing table its rock steady in between 2 cells. both cells and all the ...

well...problem solved i guess. it looks like the ebay special aftermarket distributor was inferior to the stock junkyard distributor. i just installed the junkyard distributor with the hall effect GM set described in step 50 in the assembly guide. now i have a good clean tach signal. best 40 bucks ...

hooked the ECU back up to the motor but ran a wire a tach new wire from distributor to the relay board and grounded the ground wire from the distributor to the motor instead of the sensor ground on the relay board. i do get spark with the Vref disconnected (verified with a timing light) but still no ...

whoa..lol. i forgot about the 2 switches next to the rpm and O2 pots. so i am now getting RPM with the stim as well as reading for everything else. still currently have the board set up per the manual 3.0 board as mention in my last post. but i am still showing No rpm when hooked up to my GM HEI 8 ...

ooookkay..its official. i got the stim today and assembled it. earlier i decided to get back to square one with the input circuit. so currently i am running just like it says in the 3.0 manual...

"On the V3.0 main board:

use the 'Hall sensor circuit' (step #50 in the assembly guide),
jumper ...

i dont have an osciliscope....but i did order a megastim 2.2 yesterday. i ll post once i get the stim assembled.

thanks,
Vic

well i dont have a stimulator. i do know that the datalogs are showing 0 rpm. i was very tedious with wiring it up..taking everything i learned from the first megasquirt install. i guess i will have to buy a stim.

ok... MS2 v3.0 board NOW RUNNING v2.905

I used this ECU with v2.885 to control fuel only on a ford straight 6. it often had a noisy tach signal so i used a diode inline to quiet it down which worked. i have since pulled the ford straight 6 and dropped in a chevy v6 turbo charged with TBI injectors ...

I have 5v on my Vref wire all the time. My cranking rpm is the same everytime though. I havent had any issues as of late with it being done this way. I pull my 5v from my tps sensor. I use 10* in the top 2 cells in the 1st row on the timing table.


what have you done to insure a good clean tach ...