Data stream definition ADS file for the MEFI controler

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eliama
Posts: 4
Joined: Thu Jul 30, 2020 10:24 am

Data stream definition ADS file for the MEFI controler

Post by eliama »

Hi guys i am new to the site.

I have a MEFI4a and was wondering if anyone has the Data stream definition.
I am trying to install more sensors, i have the ECU pinout but need the definition to locate the packet offset ....
In scanner pro some of them don't exist.

Unless there is a way of finding out the data stream from the current bin.
Any help is appreciated

Eli

cbernhardt
Posts: 93
Joined: Fri Apr 18, 2008 5:19 am

Re: Data stream definition ADS file for the MEFI controler

Post by cbernhardt »

You can purchase scanning software for the MEFI controller here:
http://mefiburn.com/mefiscan.asp

eliama
Posts: 4
Joined: Thu Jul 30, 2020 10:24 am

Re: Data stream definition ADS file for the MEFI controler

Post by eliama »

I already have that, i am just trying to add sensors and want to know what is the packet offset for theses extra sensors
i have the pinout for the MEFI4a and J1-18 is oil level
what would the packet offset be for that sensor ?

Thanks
Attachments
packet offset.JPG
packet offset.JPG (9.89 KiB) Viewed 175 times

cbernhardt
Posts: 93
Joined: Fri Apr 18, 2008 5:19 am

Re: Data stream definition ADS file for the MEFI controler

Post by cbernhardt »

According to the ADX file 0x2C is the packet offset for the TPS sensor.
Is the J1-18 pin an input or output? According to the connector diagram I have the J1 connector is an output connector.
The J2 connector is listed as the output connector, but J2-20 is shown as Oil Pressure Input so I am not sure how accurate this connector diagram is.
Are you trying to wire an oil level sensor into the MEFI controller?

Here is the way I added a wide band O2 sensor so that I could read the AFR from Scanner Pro.
If your oil level sensor has a 0-5 volt output you could use this method.
http://www.carols62.com/ramjet/wideband.html
Hope this helps.
Charles

eliama
Posts: 4
Joined: Thu Jul 30, 2020 10:24 am

Re: Data stream definition ADS file for the MEFI controler

Post by eliama »

Thinking about it, this oil level sensor might be analog.
Meaning its just on or off and not 0-5V.

Thanks for sending the link, i have already seen the thread. My issue is that I already have an oil pressure sensor and was trying to use another port.
I guess it will be easier to just temporary rely on the analog gauge and plug in the wideband for logging.

Eli

cbernhardt
Posts: 93
Joined: Fri Apr 18, 2008 5:19 am

Re: Data stream definition ADS file for the MEFI controler

Post by cbernhardt »

Guess you need to check the output from your oil level sender.
If it is just an ON/OFF switch you could wire it with a +5v from J2-2 and then configure one of the unused pins (like J2-4 - Fuel Pressure) to act like a switch showing OK with +5 and LOW with 0v.
Are you logging a wide band?

eliama
Posts: 4
Joined: Thu Jul 30, 2020 10:24 am

Re: Data stream definition ADS file for the MEFI controler

Post by eliama »

Yes i will be logging a Wideband.
Engine was on the Dyno and i just put it back in the engine.
I had to remove some spark advance and now i want to make sure AFR is optimal

cbernhardt
Posts: 93
Joined: Fri Apr 18, 2008 5:19 am

Re: Data stream definition ADS file for the MEFI controler

Post by cbernhardt »

I think you will find the stock tune to be very, very rich.

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