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

sorry i missed this reply, In my situation the combination of going to a progressive throttle opening on a 4 barrel and smaller injectors cured it for me, I see you can't change injectors but maybe you can modify your throttle linkage...anyhow that's what worked for me.

For some reason TS will no longer work with BlueTooth. It's been working really well on my desktop and my laptop and then it stopped working on my laptop, that is every time I try to launch it TS shuts down with no warning(winXPsp3) and on my desktop(Win7 64) I get a warning but it shuts down as ...

Is 24 awg 2 con shielded wire acceptable to use for crank vr/cas vr sensors?

I replaced the 42# injectors with 36# injectors and changed the throttle linkage to progressive linkage on the 4 barrel throttlebody , now I don't get the wild oscilations in afr on lite throttle just a lean spike as the secondaries open. I haven't used map based AE but that seems as if that would ...

Thanks Lance,
I guess I'll have rope a friend in to do a bunch of driving while I tune.
BTW I just got back from a 800 mile vintage car rally and the engine/MS ran flawlessly with the exception of the light throttle fluctuations, unfortunately the laptop didn't so I wasn't able to take advantage of ...

Thanks Lance,

Then the EGO feedback isn't doing anything, and the AFR table isn't doing anything, so the fuel is determined entirely be the VE table and opening time, etc. As a result, you shouldn't expect the measured AFR to follow the table AFR.

Just a general comment - you shouldn't be trying ...

Really ...no insight? Looking at my pw I'm seeing pw down to 1. Could this be part of the problem? My injectors are too big?

After some more datalogging I can see the pattern. It appears that around 35-50kpa the afr get unstable and oscillates by as much as 13.7-18.1. Anything bellow 35-40 kPa the afr stays lean but stable and above about 50kpa the afr is fairly stable. What can I do to smooth out the afr in this area? I ...

So would I replace the 0.1 cap, c13 in schematic, with a 100 µF/25V? Or do I add one somewhere else or in addition to?

so whats's happening is similar to what's described in this thread:
http://www.msefi.com/viewtopic.php?f=31&t=32609&p=200774&hilit=decel+fuel+cut#p200606
It's only under lite throttle that the afr oscillates so much, under acceleration or more throttle/map the afr is fairly stable. I've been trying ...

Really? No one can tell me where on the MSII board to solder a capacitor between the +12 V line to the stepper chip and ground?

I don't think the mapdot is affecting AE or afr, but I could be wrong, because I have the threshold set too high and AE is essentially turned off

Just to add to the to the confusion if you look at time 207.609>231.281, with the exception of one spike the afr is fairly consistent but the pw/map is oscillating in the same range as it is here 701.875>779.250 but the afr is much less stable.

Thanks
I had to use different headers and cut them up a bit to fit the engine in but other than that it wasn't too bad.
I wouldn't say the cam is extreme at all, I can get a fairly smooth idle @ 650 rpm
I'm really unsophisticated about all this but just looking at it, the afr isn't consistently ...

this is the throttle body:
http://www.auto-nomics.com/cgi-bin/showresults?a=detail&part=10850-002-D
with throttle body inserts to reduce it to 400cfm
on an Offy 360 intake
42lb injectors
The vacuum hose for the map sensor is attached to one of the tubes on the base of the TB and the MSII unit is ...

Thanks for looking

I think I've gotten my VE table pretty dialed in, however I get some pretty big fluctuation in afr when in a steady state, that is the throttle position, rpm, and map remains the same but the afr fluctuates from 13.6 to 16.5:1. I've disable AE, xtau, and set ego controller authority to 0. Any ideas ...

I've been struggling for years to get the iac to work consistently. I started out with this unit in the DarkStar housing:
http://shop.oreillyauto.com/productdetail.aspx?MfrCode=NIE&MfrPartNumber=21774&PartType=506&PTSet=A
and jumping the 2 resistors io the msII board
It would start fine but would ...

any news on this?

is this project still breathing?