Question about 1990 Volvo 240

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Thanks he thinks he found it the fuel level sensor unit was dead so replaceed it when he did he found the plug to the sensor unit was totally disconnected (not there ) is the pump supposed to run all the time

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By pump i assume you mean fuel pump. If the car is running it is always running yes.
Keep me posted.
Lee

Posted on Jun 23, 2008

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Posted on Jan 02, 2017

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My gas gauge in my 2002 Pontiac Bonnivile shows empty all the time


Fuel Gauge Troubleshooting

Fuel Gage
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the CHECK GAGES indicator illuminates.
DTC P0462
The fuel level sensor changes resistance based on fuel level. The PCM monitors the signal circuit of the fuel level sensor in order to determine fuel level. When the fuel tank is full, the sensor resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sensor resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sensor in order to calculate the total remaining fuel (%) in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the IPC in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics
DTC P0463 (3.8L)

How to test fuel gauge tank sending unit P0463 GM

Mar 29, 2017 | 2002 Pontiac Bonneville

1 Answer

2006 Chevy Colorado Truck. Gas tank filled and fuel gauge indicator dropped to 1/4 full, when truck is idling fuel gauge drops to empty and low fuel light comes on. Suggestions? Thank you.


Check and or test fuel gauge sending unit and the gauge . Videos on youtube showing how to . Also i would have the vehicle checked for DTC's - diagnostic trouble codes . You may want to think about taking to a qualified repair shop .

Fuel Gage
The instrument panel cluster (IPC) displays the fuel level as determined by the engine control module (ECM). The IPC receives a serial data message from the BCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of serial data communications with the BCM.
• The BCM detects a loss of serial data communications with the ECM.

DTC P0461
The fuel level sender changes resistance based on fuel level. The powertrain control module (PCM) monitors the signal circuit of the fuel level sender in order to determine fuel level. When the fuel tank is full, the sender resistance is low and the PCM senses a low signal voltage. When the fuel tank is empty, the sender resistance is high and the PCM senses a high signal voltage. The PCM uses the signal circuit of the fuel level sender in order to calculate the total remaining fuel percent in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the instrument cluster in order to control the fuel gage. The fuel level information is also used for misfire and evaporative emission (EVAP) diagnostics.

DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage

Jan 01, 2017 | 2006 Chevrolet Colorado

1 Answer

My cat 305 mini ex run for a little while then goes dead the fuel shut off kill the engine for some reason any ideas


two units that can shut down a motor are low oil level/pressure switch/ sensor and low coolant level/ coolant temperature sensor
there may be a sensor for hydraulic pump pressure / levels
a safety sensor ---seat belt or operator bar may also be a cause of the stoppage
best have a service technician check it out

Sep 27, 2015 | Mini Cars & Trucks

1 Answer

Fix code p0461


The fuel level sensor consists of a float, a wire float arm, and a ceramic resistor cord. The position of the float arm indicates the fuel level. The fuel level sensor contains a variable resistor, which changes resistance in correspondence to the amount of fuel in the fuel tank. The Engine Control Module (ECM) sends the fuel level information via the class 2 circuit to the instrument panel (I/P) cluster. This information is used for the I/P fuel gage and the low fuel warning indicator, if applicable. The ECM also monitors the fuel level input for various diagnostics. What you will need to tackle this is a Chilton's manual so you will have the correct schematic on your vehicle and a multi meter so you can find out if its the fuel level sensor that is faulty or maybe it in your wire harness. I can explain to you what to do but if you never have preformed it before your only going to be more in the dark then now so if you are going to attempt this on your own go on you tube put your fault code P0461 and there is a video on what to check to make sure what is at fault, I caution you please check all the wiring and your plug connector first don't run out and buy a new fuel level sensor thinking it going to fix your problem that would be a 250 dollar mistake it may be in a faulty wire or signal wire I have found on most of the ones I worked on road salt played a big part on corroding the wires out and it was a simple fix. good luck God Bless

Read more: http://engine-codes.com/p0461_chevrolet.html#ixzz3RTsw1cD1

Aug 22, 2014 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

Carberetor stalls up hill


at WOT? too? wide open throttle or just cruise up.?
i can do carbs, 50 years. expr.
1; CHOKE OFF, or it floods. and stalls.
2: float level too low,
3: fuel pressure too low , causing # 2
4: fuel pressure too high causing flooding.
(or float valve stuck open do to bad or too much fuel pressure !!!)
5: main jet filthy ( are not all,that way by now?)
6: power jet dead.
7: air emulsion tubes or jets, clogged.

the trick is to find out , IS IT too lean, or too rich, (or spark bad)
bad spark plugs just head hills. (they love to fail old under higher pressures)
so spark is first, no carb on earth works with bad spark
can burn gas with out perfect spark and timing. of it.

there are tests to do that finds the Rich /lean truth.
i use hand held propane gas, i crack the valve on the fly
and if power returns, its lean.
if not , its not lean. but maybe too rich.
for rich , (no 5gas dyno or wideband 02 bung)

i read spark tips, like the olden days. (fun for some)
in fact we'd fly up a hill, and park fast. stalling engine,
fast, and then pulling spark plug (any) is it black or white.
white, lean
black is rich missing.
love my wide band sensor, no more doing that. (a tool)

ive also done same and checke float levels. oops got bad fuel
even algae or rust in fuel bowl.
i cut the ignition on the fly and found bowl near dry.
bingo, fuel starvation
took a new gas tank to fix this car. (or total refurb)


Jan 13, 2014 | Toyota Pickup Cars & Trucks

2 Answers

2002 dodge 1500 truck code 0463


Diagnostic Trouble Code (DTC) P0463 is "Fuel Level Sending Unit Volts Too High"
The fuel level sending unit voltage is monitored by the Powertrain Control Module (PCM) when the ignition switch is on and the battery voltage is more than 10.4 volts. This DTC may be stored when the fuel level sending unit voltage at the PCM is more than 9.4 volts for 2 seconds or more. The possible causes are: defective fuel level sending unit , defective connectors or wiring, or a defective PCM.

May 23, 2011 | Dodge Ram 1500 Cars & Trucks

4 Answers

2002 eldorado ESC- gas gauges stays on full


Not a fuse.There is no fuse for the level sensor.These are known for fuel level sensors being bad.Sometimes they will leave a code and sometimes not.You can check codes and see if you have a fuel level sensor code.The other thing you can do is check the connections and make sure they are clean and on securely.If you find that the level sensor is bad.Then it is easier to replace if the fuel in the tank is as low as possible for easier removal of the fuel tank.Hope this helps.Good luck.

Dec 21, 2009 | 2000 Cadillac Eldorado

1 Answer

Gas gage fluctuates once it reaches 1/2 tank. 1999 chevy surburban. what is the best fix


I think that the problem mainly lies in the Fuel Sending Unit. Check that its Fuel Level Sensor is all right and is the latest model. I am telling this because if it is not the new one, it can cause corrosion in the sensor and cause shaking and fluctuation of the Gas and Fuel Gauge. I think you can get it.
Thank you Sir, have a nice day.

Sep 25, 2009 | 1999 GMC Suburban

1 Answer

I need to replace the fuel level sending unit on 99 Subaru Legacy


sorry no pics but i can tell you that is the cover and the pump and sending unit are on the same Assembly{also the level sensor can be tested with a ohmmeter for proper diagnosis}

Jun 10, 2009 | 1999 Subaru Legacy

4 Answers

Fuel gauge


khooper, in another forum, told me that "Chevron Techron Fuel System Treatment Plus can remove harmful sulfur deposits from the sending unit and a filmer agent that can prevent the deposition of said sulfur"

My 05 Trailblazer LT 2WD.
Erratic readings, and when the fuel level was below 1/2 full, the needle would sit on "Empty" with the amber light staying on.

So I went to a dealer, they replaced the fuel level sensor (p/n 19177712 SEN KIT 3.107 $118.62) with labor $270.00 for a total of $398.86 this appears to have fixed it for now.

I also talked to another mechanic who blames ethanol for these deposits !

Mar 08, 2009 | 2006 Chevrolet Trailblazer

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