Tell if the truck was tuned prior to my ownership?
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Tell if the truck was tuned prior to my ownership?
Hard to say. Look for obvious signs like exhaust mods. Otherwise all a guy could do is try to read the contents of the ECM and compare to a stock base file.
Are the tech 2 only ac powered?
What is the procedure to get to the fuel levels info on a Tech 2. ?
It is powered through the OBD II diagnostic port (integrated with the connector), or AC/DC with the adapter. To view the fuel level, a simple menu navigation to the data category is all.
If you have an Android device (phone, tablet, etc.), you can use any number of aftermarket OBD II adapters and an app to view nearly all of the vehicle data, as well as read/clear trouble codes. I use, and like, the ELM327 Bluetooth adapter with the Torque Pro app (Google Play Store). Interfuse (ebay) is a decent, inexpensive distributor. There are similar options for Windows and iPhone devices, but the software sucks, is marginally functional, and what does work (painfully), isn't free or inexpensive. Torque Lite (free code reader) and Torque Pro (less than $10) are highly functional and feature-rich.
I thought that I posted, but must not have.
Hard to say where to start, but I guess what I would do is look in the data tables and see if you can find the fuel level sensor readings in volts.
I might try to start with the tank empty. Not that I recommend this, but run until it stops. Add 3-4 gallons or whatever cushion you want and then take another reading. Add one measured gallon at a time and take your readings with each step. I don't think that the voltage readings are buffered, but be mindful of this and watch to see if the reaction is immediate or dampened.
Fuel tank Level remaining 74%
Fuel Level Sensor 1.6 volts
I will test at various levels and post...
That coincides with 18 gallons more or less.
Gauge dropped just 2 needle widths less than 1/2 tank in this next 6.5 gallons used. Should be at 1/2 tank but it is 2 needle widths above 1/4.
Fuel remaining 35%
Sensor Volts: 2.1 volts
8 or 9 gallons remain according to the scale.
The gallons used needs to be treated as an estimate not a hard measured fact. They can vary greatly or they can be spot on.
I see that on the scale at 2.1v should be 8 or 9 remaining. We'll if I go by the fuel used vs pumped back in the gal used meter is very accurate. So would this indicate the fuel level sensor is going goofy or it could be in the gauge. 1/4 tank error is not acceptable to me. I'm hoping I can evaluate without guessing....
Dropping the fuel tank seems to be a PITA if un-necessary.
Thank You
Unfortunately like I stated earlier the only real way to know is to empty the tank add your safe cushion and add a measured gallon at a time and take readings.
You'll want good funnel, a 6 gallon or so can, and a means of measuring/dispensing 1 gallon (or 1/2 gallon) at a time. You could probably use a pitcher for this part. When the big can is empty you'll just have to go for more.
From all the information you've provided, I (still) see this as a problem with the tank sender. Everything lines up, except the actual fuel tank level compared to the indicated level and ECM data. The only "incorrect" data is the actual level, and ONLY the tank sender can produce data for that.
Dropping the tank is a PITA. Removing the bed is less of a PITA (and easier than it sounds). This allows for an easier R/R of the tank sender and close inspection and repair of all the associated connections. You don't have to empty the tank, and the truck remains drivable for testing, etc. during the repair, whereas tank removal requires complete reinstallation and removal (again) to make corrections and/or additional repairs.
I removed and tested sensor:
Results:
52.5 ohms - 200 ohms range
52.5 ohms full tank
5" off bottom of tank, 200 ohms/OL
Is this normal or is sensor range wrong?
I had the meter set on th 200 ohm scale, i must additional test on the 2K scale....
I changed the tank level sensor and all seems normal now.
Thank You for all the input.
How did the metal float arm look? I've seen some come out scary rusty.
Jersey truck
Float arm looked normal / like the new replacement. No Rust.