jay&dana@telus.net ("jay & dana") wrote in
<000101c0534f$20c55920$305535d1@a4a91192>:
>IAC, IAT, IAS, TPS, MAP. Okay, besides the acronym list on the Dakota
>Home Page, where could I find (other than what they are) a description
>as to their purpose and location in a 97, 318? What I am trying to
>say, does anyone have any web sites with pictures showing the location
>of these on a Gen III ,V8, Dakota?
>Forget about the IAT as I know it is Intake Air Temperature and is
>located on the front passenger side of the intake manifold.
>
>Thanks in advance
>Jay
>
Hmm, I don't know of a page like that, but maybe this will help:
IAC: Idle Air Control. This is located on the back of the throttle body.
This is a plunger which moves in and out of an orifice to control
the amount of air that can get into the engine when the butterflies
are closed. (Basically controlling the idle via a controlled vacuum
leak.)
Some people will also refer to it as an AIC (Air Idle Control?)
Some people will also refer to it as an IAS (Idle Air Sensor??)
(I don't really see the last one myself; I wouldn't consider it
a sensor; a sensor is something that collects data; the IAC is
just a solenoid; an output.)
IAT: Like you said, Intake Air Temp, front right side of intake manifold
IAS: see IAC ;-)
TPS: Throttle Position Sensor. Located on the driver's side of the
throttle body. This reads the angle of the butterfly valves in
the throttle body, and is used by the computer to guess how much
you're pushing the go pedal down.
MAP: Manifold Absolute Pressure. Located on the front of the throttle
body. This reads the current barometric pressure inside the intake
manifold, which is an important part of determining current engine
load in a speed density system (like ours). I believe that when the
engine is off (but the key is on), this sensor will read the current
barometric pressure (i.e. 29.97 or whatever), so if you've got a
diagnostic tool, you can have your truck act like a really expensive
weather station. ;-)
---Jon-
.---- Jon Steiger ----- jon@dakota-truck.net or jon@twistedbits.net ------. | Affiliations: AOPA, DoD, EAA, NMA, NRA, SPA, USUA; Rec & UL Pilot - SEL | | '92 Ram 150 4x4 V8, '96 Dakota V8, '96 Intruder 1400, '96 FireFly 447 | `------------------------------ http://www.cs.fredonia.edu/~stei0302/ ----'
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