I'm adding a second map sensor to my $8D setup. I allready patched the code using the availablw WB_o2 patch, to use pin A3.

I have a question about the sensor however.

THe normal map sensor is:

BA4 (MAP +5v ref.)
BB6 (MAP GND)
GF15 (MAP Signal)


Now I know the map signal will goto my A/D input (pin A3). Can I use the 5v ref and ground off my existing MAP circuit, or will that overload/cause issues?

-- Joe

 

All I can give you here is a semi-educated guess answer... I don't thin kit would be an issue. These ecm's seem to be built well enough to take a little extra load (just not a lot!) It's not like there will be hardly any current flowing through the circuit anyway.....

 

I'm been runing two MAP sensors for about 6 months using the same 5 volt ref: wire and haven't seen any problems.

I added a 2bar MAP sensor for my PAC (Progressive Alky Controller) and BTW thats the best way to do water/alky inj.
because it varys the pump speed in ref to MAP for boost.

It would be nice to have the 2bar MAP input to the ECM and have
Timing and Fueling control with boost in the 730ecm.

Let me know if I can help with testing or anything.

 

Awesome. I'll wire that up tonight.

Hrmm. I bet there is an unused powered output on the ECM that can serve the same purpose.

I have all the math figured out, and most of the locations to change. There is a ton of free space in to code too. The way you have to patch the code is kinda lame however. But its coming along. I'll have the ALDL output working by tonight hopefully. This weekend I plan on adding the timing retard table.

If you have an ECM bench, and could test my code in steps that would really help the project. I don't have one, and can't really afford to spend that kinda cash right now. I'm relying on testing my car, and believing the aldl output. If someone could actually test the timing code when its done, and see if actually retards the dist that would be awesome.

-- Joe

 

I can probably help out with some of the bench testing.

No guarantees on how quickly I can get things done, since I've got a lot of other demands on my time, but I'll do the best I can.

Email me when you've got a bin together.
hotrodder(at)mindspring.com