Download View - The ECU+

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If you're not at sea level, a MAP sensor will read out wrong based on your elevation (height
above sea level). In Dulles VA where Mach V Motorsports is, the MAP sensor will be off by
about 0.2 PSI. In Denver CO, it'll be off by 2.5 PSI. Always. If you drive from Dulles to Denver,
it'll vary during the trip. If you look up your city at http://www.wunderground.com and get your
elevation, you can see the MAP vs boost gauge inherent pressure error by plugging your
elevation into the form at http://www.uigi.com/Atmos_pressure.html.
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The weather will affect your reading. Variations in weather will give you numbers that can be
off by around +/- 0.5 PSI. You know when they say on TV that there's a high pressure system
moving in? When it moves in, your MAP sensor reading moves up.
In addition to the above, all sensors have a accuracy that varies depending on pressure and temperature.
The GM 3 bar unit, for example, will vary by +/-0.75 PSI, and will also vary on a per-trial basis by
about 0.5 PSI for a new unit.
The bottom line is that your MAP sensor may or may not match what your boost gauge reads depending
upon elevation and the accuracy of the sensor. It's possible to adjust your MAP sensor calibration so
that the two will match, but it will take a bit of work. Simply configure your MAP sensor as a custom
type, and adjust the calibration until the two readouts match.
14 Support and Getting Help
Because the ECU+ system is a complex device, you may have problems with the software or
installation. You have several lines of support open to you:
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For hardware installation problems, contact the dealer that you purchased the ECU+ system
from. They're best equipped to handle these type of problems.
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For software support, again your dealer is a good first place to start.
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For tuning help, your best bet is the forums at forums.ecuplus.com. The forums are a great
place to hang out and learn about how others are using their ECU+. The forums are also used to
announce new software or firmware updates, and you can request new features or ask almost
any type of question here. If you own an ECU+, you should definitely monitor the forums for
the latest ECU+ news and information.
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For any type of support, you also have the option of e-mailing the ECU+ developer – just send
an e-mail to [email protected]. E-mails will generally be answered within 24 hours.
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If your ECU+ was working fine, but “breaks,” contact your dealer for information about their
return and repair policies.
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