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Old 12-26-2020, 08:28 PM   #1
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New scan gauge

I have just bought a new scan gauge 2, question is which gauges are most important to monitor? thanks in advance.
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Old 12-26-2020, 08:49 PM   #2
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I monitor transmission temperature and engine temperatures.
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Old 12-26-2020, 09:04 PM   #3
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I monitor transmission temperature and engine temperatures.
thanks, coolant temp for sure, but the temp. on the 6 speed trany on the Workhorse chassis can not be monitored.
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Old 12-26-2020, 09:12 PM   #4
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Fuel trims

Fuel trims a very important so you don't run into a lean condition I explain in this video. You don't want to see double digits

Also in the second video you don't want to over heat

Engine over heating alarm warning
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Old 12-26-2020, 09:14 PM   #5
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Oil pressure trans temp coolant temp miles to empty tire pressure
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Old 12-27-2020, 09:53 AM   #6
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X2 for measuring engine coolant temperature. If your Workhorse gauges are anything like the Chevrolet dashboard used on the P-30 chassis, the coolant temp. gauge is very inaccurate.
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Old 12-27-2020, 11:29 AM   #7
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Fuel trims a very important so you don't run into a lean condition I explain in this video. You don't want to see double digits

Also in the second video you don't want to over heat

Engine over heating alarm warning
how do I find the codes/set up instructions? I went scangauge.com/support and was not much help. I'm I missing something or making something easy to hard? thank you for your videos. I will watch more of them as time permits.
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Old 12-27-2020, 03:13 PM   #8
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I agree with Kevin, fuel trims would be first on my list because a lean condition will take out the motor and the fuel trims are an early warning.
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Old 12-27-2020, 05:12 PM   #9
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I agree with Kevin, fuel trims would be first on my list because a lean condition will take out the motor and the fuel trims are an early warning.
both short and long fuel trims? banks 1 and 2? the Scan gauge short list has 4 banks for both long & short. doesn't list the MAF at all.
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Old 12-27-2020, 05:32 PM   #10
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MPG (instantaneous) , AVG (mpg), Throttle Position sensor. Then row around to different settings. ie. Eng Temp when hot out.
This is how I get a true calculated 8.8 mpg including all gen usage, pulling an Accord. On a 35k lbs diesel. In mtns, hills, short trips, 2 lanes, city and idling.
My LBCU monitors another 3 parameters. ie. Trans Temp
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Old 12-28-2020, 01:38 PM   #11
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For me the BIG ones are monitoring LF1 and LF2 at all times, due to the 8.1L's known failure to set a check engine light on fuel trim, as this can cause an undetected lean condition which could kill the engine. For me the other 2 spaces are normally set to read coolant temperature, and transmission temperature (note some model years with the Allison Transmission don't support reading transmission temperature through the OBDII port). On flat land I will often watch battery voltage instead of transmission temperature.
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Old 12-28-2020, 02:17 PM   #12
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For me the BIG ones are monitoring LF1 and LF2 at all times, due to the 8.1L's known failure to set a check engine light on fuel trim, as this can cause an undetected lean condition which could kill the engine. For me the other 2 spaces are normally set to read coolant temperature, and transmission temperature (note some model years with the Allison Transmission don't support reading transmission temperature through the OBDII port). On flat land I will often watch battery voltage instead of transmission temperature.
where do I find the TXD, RXF, RXD, MTH codes for LF1 and LF2? scan gauge has been of no help.
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Old 12-28-2020, 03:36 PM   #13
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where do I find the TXD, RXF, RXD, MTH codes for LF1 and LF2? scan gauge has been of no help.
LOTS of info HERE: https://www.oemys-performance.com/sc...m#scan%20gauge
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Old 12-28-2020, 04:12 PM   #14
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thanks Ed, the links do not seem to be working so I sent an email to the admin. wish I knew how others have set their gauges up to read fuel trims etc.
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