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Old 10-18-2011, 12:08 PM
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scan II gauge

after seeing the ad many many times i decided to click on the link and look into them better nice and neat.

so how accurate are these and whos using them? also do they always have to be plugged in?
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Old 10-18-2011, 12:28 PM
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It's as accurate as the sensors the PCM reads. You can leave it plugged in all the time if you want. It powers up and down on it's own. You can unplug it if you want. Won't hurt anything but is not needed unless you have to access the OBD port for some other reason (i.e. scanner).
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Old 10-18-2011, 12:30 PM
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They're pretty accurate. It's the same info your PCM is reading from your sensors. One benefit is that it gives you a better idea what your trans temp and engine temp is as a quantitative value instead of the dummy gauge on the dash.

Here is a pic of mine with trans temp (TFT), engine temp (FwT), volts, and RPM. You can display 4 gauges at a time. It plugs into your OBDII port constantly. It can also read CEL codes. Just disconnect it when going for your smog check.
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Old 10-18-2011, 12:45 PM
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Nice thanks fellas.

my over head lie-o-meter is broken so i should invest in one of these instead of getting that fixed??
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Old 10-18-2011, 12:51 PM
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I love mine. I leave it plugged in all the time. it shuts itself after 12 seconds of no input from the computer. I have mine set up almost identical to jh818, except that my water temp is on top and trans temp is on the bottom. I really like it.
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Old 10-18-2011, 12:52 PM
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It won't replace your PCM. Your PCM takes those data and then does what it needs to do to make your truck run properly. This just displays info for you.
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Old 10-18-2011, 01:02 PM
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Quote:
Originally Posted by jh818 View Post
It won't replace your PCM. Your PCM takes those data and then does what it needs to do to make your truck run properly. This just displays info for you.
sorry dont know why i put PCM in there thats not what i meant. lol probably was on my mind cuz of reading i have that prob when i write.

my over head lie-o-meter is broken so i should invest in one of these instead of getting that fixed??
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Old 10-18-2011, 01:10 PM
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The only thing it displays from your lie-o-meter, I believe, is your mpg. There is no outside temp, nor miles to empty, nor compass.

Since I tow, I use it to track trans temp.
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Old 10-18-2011, 01:27 PM
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There have been threads in the Excursion forum on fixing that display. Gently pull it down and see if you find some loose or broken off chips and resolder them back on.
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Old 10-18-2011, 01:33 PM
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Quote:
Originally Posted by jh818 View Post
The only thing it displays from your lie-o-meter, I believe, is your mpg. There is no outside temp, nor miles to empty, nor compass.

Since I tow, I use it to track trans temp.
not to worried about the outside temp, compass or miles till empty but miles till empty would be nice but its not ever even close to acurate. it always used to say anywhere from 240-250 and i get 200-220

Quote:
Originally Posted by jh818 View Post
There have been threads in the Excursion forum on fixing that display. Gently pull it down and see if you find some loose or broken off chips and resolder them back on.
Yeah my chips are actually fried and burnt off. 2 are not even attached anymore. and its gonna cost $100 to fix.
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Old 10-18-2011, 01:33 PM
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