Hondata

hate to append to a preexisting thread...

but could an option be added to display MAP sensor voltage?

what map sensor are you using?

only when refueling and on some startups (can't recall).

But that purge valve is what's causing it. I unplugged it and never had the problem again.

I am helping a buddy test out his electronic boost controller design. It has a nice feature to wire in a switch for high and low boost settings. It's a simple loop to ground so it will be easy to control via the AUX output.

I'm sure most ebc's have this type of feature.

try to just unplug the harness connector to the purge valve. I was having the same problem.

would the ferrite core be placed closest to the ecu?

Seth, when the datalogging stops, do you have to unplug the USB cable and then plug it back in to get the PC to recognize the connection?

crucian: I tried your values given above and it did in fact remove my bouncing idle issue.

However, the vacuum reading on my mechanical gauge is not matching up to the reading in SManager. For example, my mechanical gauge would show b/w 20-21"Hg while SManager shows 18"Hg. This seems off ...

right....so i guess I should just buy a motec sensor

For what this might be worth, I purchased a "gm" 3bar map sensor from lightning motorsports which is actually an MSD 3bar sensor. MSD gave me the following info:

5v @ 43.5psi and (of course) 0v @ 0psi

The slope would be 599.844 mbar/volt

While this is close to the Motec 3bar, i'm not sure about ...