Normal operating parameters or something like it.

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Normal operating parameters or something like it.

Post by Moparty08 » Thu Sep 17, 2009 12:04 am

I know it's come up a lot from everything from voltage to a/f ratios and anything they have a gauge for.
Can one of you guys put up a section for this.

What ranges are normal for each gauge.
Maybe even normal ranges for boosted cars and n/a motors. Don't know if there's really much difference. I know everyone from time to time sees one of their gauges do something and are like oh shit is that good. This could be a good thing to be able to refer to when something like that happens. just my .2.
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Post by occasional demons » Fri Oct 02, 2009 6:52 pm

The MAP serves as a PCM input, using a silicon
based sensing unit, to provide data on the manifold
vacuum that draws the air/fuel mixture into the combustion
chamber. The PCM requires this information
to determine injector pulse width and spark advance.
When MAP equals Barometric pressure, the pulse
width will be at maximum.
Also like the cam and crank sensors, a 5 volt reference
is supplied from the PCM and returns a voltage
signal to the PCM that reflects manifold
pressure. The zero pressure reading is 0.5V and full
scale is 4.5V. For a pressure swing of 0 — 15 psi the
voltage changes 4.0V. The sensor is supplied a regulated
4.8 to 5.1 volts to operate the sensor. Like the
cam and crank sensors ground is provided through
the sensor return circuit.
The MAP sensor input is the number one contributor
to pulse width.
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Post by darthroush » Mon Nov 30, 2009 1:20 am

These specs are geared towards Neon's, where applicable:

Oil Pressure
4 PSI at curb idle speed or 25-80P PSI at 3,000 RPM.

Fuel Pressure
53-63 PSI (manufacturer lists fuel pressure with engine off, ignition on and using scan tool to activate the fuel system).

I believe the optimal charging range is between 13.2 and 14.4 volts, while 12.6 is a fully charged battery.

Transmission Temperature
Optimal temperature is at about 175°F

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