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

Made some progress today. Increased the VE values under 1500 rpm and happy to report achieved a better idle, even after WUE completed. I was also able to measure the AFR which confirmed a lean mixture.

Ken,

For the past 2 weeks my attention has been drawn to my other project.I have a lexus is300 that I'm installing turbos. Saturday morning I was able to wire the analog output from my LM2 to the ms relay board, but the outside temp was close to 100 deg so I went back in the garage and turbos. I ...

Thank you for the feed back!

I spent a little time with the VE tables last night and hope to fire up the motor and give it another go today.

I will also be connecting my lm2 wideband very soon.

Timing is something I haven't tried adjusting. I'll keep reading and maybe give it a try this weekend.

Should I be adjusting the VE table to control idle. The manual recommended a steady idle before VE tuning.

If I return the req_fuel to the MS calc'd value what is the best way to control the surging?

Should I have IAC enabled? The MS manual recommends disabling the IAC until the motor is idling smooth.

If it matters, the IAC is a Ford 2 wire PWM.

I could probably temporarily wire into the MS harness for easier tuning and data logging.
I have done exactly that with my own LM2 when I had a wideband failure...... You will certainly want to use a wideband to accomplish any meaningful tuning.

IMO of course.........

Ken

Ken,

Were you able ...

BTW..... I see you have EGO disabled. Are you using a WB o2 sensor for tuning fuel?

Ken

I have a innovate LM-2 that I will use to monitor AFR. The LM-2 is a standalone AFR data logger, although I believe it use the standard LC-2 wideband controller that I could probably temporarily wire into ...

Well... I got a little ahead of myself. At 10% throttle and 1200 rpm it idles smooth, but if I drop the idle below 1200 it surges between 600-1400. I increased the req_fuel all the way to 26 and saw no change.

It idles!

While searching "surge" I came across a post suggesting to increase the req_fuel setting. I previously had it set at 19.9 which was what the calculator recommended. I increased to 22 and noticed improvement, I ended up at 24 with a decent idle.

Ken - I attached my tune and data log at ...

David,

You might need quite a bit more then 10% until your VE table is dialed in. Don't forget to adjust the after start enrichment too.

Steven

Steven,

Thank you for the fast feedback! I'm hesitant to adjust the WUE much more due to the mega manual suggesting no more than 15%. Since I saw no ...

Hi,

I have a boat with a 66 Ford 289 with EDIS ignition and port injection from a Ford 5.0 that I'm having trouble idling. It will start at 10% throttle position but surges, coughs and dies after a few seconds.

I read coughing is a symptom of a lean fuel mixture and have played around with the ...

trakkies - Got it!

On another note, I sectioned a spare edis coil today on the mill, I figured I would share. Photo 3 I believe to be the primary coil and photo 2 is the secondary.

Can someone confirm I have my EDIS coils correctly identified in the attached pic?

The below quote is from the EDIS ignition Control with Megasquirt II page. I am confused with the underlined text.

"On EDIS8, there are two coil packages, with two coil in each package. Coil A is connected to pin 8 ...

Awesome! Thank you

Somebody....Anybody???

Matt, jumper has been installed. Do I terminate the pwm iac return wire to the Fidle terminal on the relay board?

I apologize if this has already been answered, I have spent the past hour reading the IAC sections and using the forum search tool.

How do you integrate a 2 wire PWM IAC when using the relay board kit?

From my reading I believe a +12V is supplied to one terminal and the return wire is terminated ...

Matt Cramer wrote:That doesn't sound right.

It isn't causing any problems so I'm hesitant to remove it in fear of damaging the PCB.

Any idea what circuit the Q23 transistor is part off?

Matt Cramer wrote:Exactly how much resistance do you measure between these pins?

between .6 and 1 ohm.

Should the q23 transistor In step 51K see continuity between the collector and base leads?

http://www.digikey.com/product-search/en?x=21&y=13&lang=en&site=us&keywords=ztx553-nd

After inspecting the solder points i do not see any solder bridging the gaps, but it is toning when I check with the DMM ...