ScanGauge II

I'm wondering if anyone is really technically smart on this little bugger.

What I'm specifically wondering is what is it telling you on the "MAP" gauge? Do our cars have MAF and MAP monitering? It typically gives me a MAP reading of 3.8 to 5.1 at idle and it changes rather slowly as I reach WOT.

edit: Their website isn't all that informative... :hs:

http://www.scangauge.com/

 

Bueller?

 

I believe we do have both map and maf, but don't quote me on it. I was under the impression that one of the two is used in open and both in closed. Map gives atmospheric pressure as well as boost added together...I thought 3.8 at idles sounds weird.

 

That's what the guys at ScanGuage said too. I told them that it would jump to over 30. at WOT and full boost at times but they couldn't make heads or tails of that either.

The tool is really good at everything else as far as I can tell though.

Fuel Economy,
Fuel Rate,
Battery Voltage,
Coolant Temperature,
Intake Air Temperature,
(RPM),
(MPH),
Manifold Pressure,
Engine Load,
Throttle Position,
Ignition Timing and
Open/Closed Loop, if anyone wanted to know.

 

HAve you ever used ecuexplorer ? (its freeware)

 

yeah, ecu explorer tells you the same stuff.

 

Oh ok cool. Thanks. I'll check that out.

But by same stuff do you mean it explains manifold pressure pretty well or does it just tell you ECU techinical stuff?

 

there are a lot of info on everything
if you do not understand what it means than the value would not be important anyways, unless you just want the blink of lights and numbers scrolling

 

Manifold Absolute Pressure, MAP, is just the total pressure the intake is seeing...atmorspheric (generally 14.7 at sea level, a bit more the higher you go) + boost...so if you are boosting 14.7 your map would be 29.4. Now if it is taking into acount the vacuum produced at idle, then if the vacuum is -10.0 with atmospheric being 14.7 that would be a reading of 4.7...so maybe it makes a bit more sense if you take vacuum into account.

 

That's what it's doing then. I remember reading something about that in the manual without completely understanding it.

At idle it can get as low as 3.8 and as high as 5.5 if I remember right. So when it's near the target boost (18 PSI) it's seeing something in the 30's....

Cool.... ...I gotta get some help with the simple things sometimes.

 

No problem, I am still learning too! There is so much to learn on these cars, lol. So much more complex than an old chevy small block v8.