Question about 1992 Chevrolet K1500

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Iv been having issues with a 92 chevy k1500 5.7L tbi. the fuel gauge is always reading full. i disconected the wire harness to the sender unit and the gauge goes way past full. i relocated the ground to a better spot and stil have no changes. the temp gauge is also not working...always reads to its lowest point. my main concern is the fuel gauge. just wanted to add that incase it ties into the same issue. i'm looking for all possible problems before changing the sender unit

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I'll tell you exactly what it is my 92 blazer 1500 did the same thing its the ground wire that goes to the sending unit its either broken,or just rusty it should be bolted to the cross member rite above the rear axle check it out and good luck

Posted on Aug 30, 2012

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First try pounding with you fist or a board on the bottom of your tank real hard and see if the readings are different...if they are its a sender.

Posted on Sep 13, 2009

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1 Answer

Fuel gauge reads correctly then goes to empty


9 times out of 10 the fuel pump/level sender assembly is the cause. Sometimes the gauge pod is faulty, and there have been cases where there were either poor connector pin fit issues and/or chaffed/melted/cut wires in the harness that leads back to the fuel pump. It is an extremely common fault and would be surprised if the pump/level sender assembly wasn't the cause.

I hope this info helps!
~subyguru~

Sep 21, 2012 | 1999 Pontiac Grand Am GT

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I have a 1983 chevy dually with dual tanks. the gauge reads way past full all the time. i already replaced the switch. is the problem the valve or somthing in the wiring harness?


i believe this vehichle reads exteme full if the tank sender wire is disconnected,or if the wire for the gas gauge is broken,or there is corossion in the harness connectors.

Feb 24, 2010 | 1983 Chevrolet C1500

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I recently asked about a fuel gauge that is reading full all the time on a silverado 1500 5.7L tbi. when i disconnect the fuel pump harness, the gauge goes further past full. i noticed the ground from the...


Absolutely, your gauge works off of resistance that is calibrated, if you have a rusty or bad ground you are causing more resistance, hence a full reading. Disconnecting it puts it to its default setting which is full, All the resistance in the unclean ground is tricking your sender in to thinking tank is full...

Sep 12, 2009 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

92 k1500 5.7L tbi fuel gauge always reads full and temp gauge always stuck down.... any suggestions


Two possible problems.... the temp gauge wire is a single green wire attatched to the driver's side head (no1 bank) near the front in the side (in front of plug #1) ground it and your gauge should go to full hot,,, same with the fuel gauge, if you unplug it at the tank it should go to empty, or visa versa... if the gauges respond, replace the sending units, if they don't, replave the instrument panel

Sep 12, 2009 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

My gas gauge is always reading full why 1999 cavalier


Hi

The most likely cause is that the fuel sender in the tank is faulty or that the wiring to the sender is bad.

Less common causes are a faulty fuel guage or circuit in the instrument panel.

Test the sender as it is the most likely cause and easiest to eliminate.

First inspect all connections that are readily visible to insure that they are secure & free from dirt or corrosion.

Disconnect the fuel tank sender wire at the tank. The guage should continue to show full (ignition on). Ground the wire from the sending unit at the fuel tank to any good grounding point on the car. The gauge should go to "Empty". If it does this is a strong indicator that the sending unit is at fault.

Hope this helps. Please do rate my answer. Thanks

Sep 02, 2009 | 1999 Chevrolet Cavalier

3 Answers

2001 HYUNDAI FUEL GAUGE


well its either the wire between the tank and guage in dash or it is the gauge in the dash

Aug 15, 2009 | 2001 Hyundai Accent

2 Answers

Fuel Guage reading full


this problem is caused by a defective fuel gauge sending unit in the fuel tank.

May 12, 2009 | 1997 Chevrolet S-10 Pickup

2 Answers

Fuel gauge not working all the time.


This is a normal concern.
The instrument cluster uses 4 different operating modes to calculate the fuel level:
Anti-slosh (default mode)
Key OFF fueling
Key ON fueling
Recovery
After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sender readings caused by fuel moving around in the tank), the fuel gauge takes approximately 55 minutes to go from empty (E) to full (F).
The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The key must be in the OFF position throughout the entire refueling of the vehicle.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
The instrument cluster must receive a valid key ON fuel sender reading within 1 second of the key being put into the RUN position. The key ON sample readings are considered valid if the fuel sender reading is between 15 ohms ± 2 ohms and 160 ohms ± 4 ohms.
If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
The key ON fueling mode (approximately 90 seconds to read empty [E] to full [F]) requires 3 conditions be met:
The transmission is in PARK (P).
The key is in the RUN position.
At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) position (automatic transmissions). When the 30-second time has elapsed and at least 15% of the vehicle's fuel capacity has been added, the fuel gauge response time is 90 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P), the fuel gauge strategy reverts to the anti-slosh mode. The key on refueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the key in the RUN position.
Recovery mode is incorporated into the instrument cluster strategy to recover from a missing fuel level input during a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sender or its circuits. Recovery mode (empty [E] to full [F] approximately 20 minutes) is initiated when the following 2 conditions are met:
The instrument cluster is in the anti-slosh (default) mode.
The actual fuel level in the tank is greater than what is being displayed by the fuel gauge

Feb 18, 2009 | 1983 Mercury Grand Marquis

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