Question about 1999 Chevrolet Silverado 1500

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Maybe got fuel lines crossed on sending unit gas comes out of charcoal canister put new fuel pump in tank

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Yes it sounds like you have reversed the flow lines. Supply to return and return to supply.

Posted on Mar 13, 2011

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Repaired two fuel lines ,removed sending unit from tank, can't remember which lines go where three lines from engine .


Can you identify or remember which pipe on the sending unit, the pump module, is the main outlet from the pump?
The three lines are the main feed or pressure line to the engine, the return line from the engine to the tank-this line is often smaller than the main line. And the third line is not a fuel line, but the vent line for fumes from the enclosed tank to the charcoal canister. This line may be identifiable by pipe diameter being smaller, or sometimes using rubber hoses with it, or maybe just a little offstanding from the other two lines. The main line (pressure line) will be the line that has the fuel filter in it. You can identify the main line this way, then just figure out where it connects onto the tank, and sort out the other two lines-the return line and the (?smaller?) vent line.

May 08, 2017 | Cars & Trucks

3 Answers

Need to know what 3 lines from fuel tank go


The pump line, or feed line, goes to the fuel filter and then to the engine's fuel rail. A return line leaves the fuel rail and sends gas back to the tank. Usually, the feed line is slightly larger than the return line, not always.
The third line is a vent line for emission controls-routing gas fumes from the tank to the charcoal canister, where it is stored and later sent to the engine to be burned.

May 31, 2015 | Cars & Trucks

1 Answer

Location of gas pump


The fuel pump is located in the fuel tank. The fuel tank will need to be removed from the car in order to service the fuel pump.

Its not that hard to do. Basically in a well ventilated area (gas will spill and there will be vapors!!) remove the filler neck hose from the tank, remove the evap lines from the charcoal canister. Unplug the fuel pump connector from the under body plug on the passenger side. Disconnect the fuel lines. Support the fuel tank and remove the two fuel tank straps (You may need to remove heat shields and temporarily move the exhaust off to the side as well). Lower the fuel tank slowly checking to make sure you have everything disconnected.

Once the tank is down remove any debris that has accumulated around the sending unit. Remove the lock ring and finally remove the fuel pump.

That's it in a nutshell.

Let me know if you have any questions and I'll be happy to answer them. Thank you for using FixYa.com!

Feb 01, 2012 | 2002 Pontiac Grand Am

1 Answer

P0442 code with a 2008 Hyundai Tuscon


CODE PO442 - EVAPORATIVE EMISSION EVAP SYSTEM SMALL LEAK DETECTED. POSSIBLE CAUSES, FUEL FILLER CAP IS LOOSE CROSS THREADED DAMAGED OR WRONG PART, FUEL TANK FUEL FILLER NECK OR FUEL SENDING UNIT O - RING IS LEAKING, FUEL TANK VAPOR LINES IS CLOGGED DAMAGED OR DISCONNECTED, FUEL TANK PRESSURE SENSOR LOW REFERENCE CIRCUIT IS OPEN, FUEL TANK PRESSURE SENSOR IS DAMAGED OR IT HAS FAILED, EVAP CHARCOAL CANISTER IS CLOGGED OR LOADED WITH FUEL OR WATER, EVAP PURGE OR EVAP VENT VALVE IS DAMAGED OR HAS FAILED, ECM FAILED.

Jul 21, 2011 | 2008 Hyundai Tucson

1 Answer

How to replace fuel module regulator


to replace the fuel pump module.first you need to relieve the fuel system pressure.turn off radio first, then disconnect the negative battery cable.drain fuel from fuel tank.then then safely raise support car on jack stands. make sure sitting on solid level ground then remove the fuel charcoal canister hoses and vent line remove disconnect fuel pump. disconnect fuel pump electrical connector and remove fuel filler hose from fuel tank then remove the fuel tank from the vechicle.the heat shield and the rear exhaust system may have to be remove if you problem dropping the fuel tank.once fuel tank dropped you need snap ring pliers to remove the fuel pump module retaining ring.disconnect the fuel pump sending unit.disconnect the fuel pressure sensor and fuel pump module electrical connector .if you need help to replace the fuel level sending unit.you need a haynes repair manual.it has instruction how to remove and replace the fuel level sending unit.but most of the time the whole new fuel pump module come with new fuel level sending unit.if you are replacing fuel pump.when done put every thing back visa versa. be very careful working around gasoline and fuel tank.dont smoke.becareful dont make no sparks with wrenches when removing gas tank.wear safety glasses and have a helper at all times. dont work under vechicle by your self.

Apr 11, 2011 | 1999 Oldsmobile Alero

1 Answer

Po440 code


CODE PO440 IS EVAP SYSTEM MALFUNCTION CONDITIONS. POSSIBLE CAUSES CHARCOAL CANISTER IS LOADED WITH FUEL OR MOISTURE. FUEL FILLER CAP IS LOOSE CROSS THREADED DAMAGED OR WRONG PART. FUEL TANK FUEL FILLER NECK OR FUEL SENDING UNIT O RING IS LEAKING. FUEL TANK PRESSURE SENSOR IS DAMAGED OR DISCONNECTED.OR FAILED.FUEL TANK VAPOR LINES IS CLOGGED DAMAGED OR DISCONNECTED.PURGE VALVE VAPOR LINE IS CLOGGED DAMAGED OR DISCONNECTED. PURGE OR VENT SOLENOID POWER CIRCUIT IS OPEN CHECK THE FUSE.PCM HAS FAILED.

Jan 12, 2011 | 2001 Chevrolet Venture

2 Answers

Gas pump keeps tripping off often


you have a bad charcoal canister. Go underneath the left rear of the car, pull the big hose off the charcoal canister, and if charcoal come out of the hose, replace the canister. This is a common problem w/Hyundai and Kia.

Oct 14, 2010 | Hyundai Sonata Cars & Trucks

1 Answer

Engine check light just came on....neighbor hooked some gadget up and it came back with code P0440. What is it and is it dangerous. Will I get stranded???


The code is pretty standard and has to do with emissions. Manufacturers these days have strict rules to emissions that the car puts out. So, this code relates to that. It is Evaporative Emission Control System Malfunction A code P0440 could mean one or more of the following has happened:
  • The gas cap is not installed or working properly
  • The purge solenoid has failed
  • The canister is plugged and not working properly

P0440 EVAP System No Flow During Purge Possible Causes Setting Conditions
  • Charcoal canister is loaded with fuel or moisture
  • Fuel filler cap is loose, cross-threaded, damaged or wrong part
  • Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
  • Fuel tank pressure sensor is damaged, disconnected or it failed
  • Fuel tank vapor line(s) is clogged, damaged or disconnected
  • Purge valve vapor line is clogged, damaged, or disconnected
  • Purge or vent solenoid power circuit is open (check the fuse)
  • PCM has failed
So, basically if you drove around with the gas cap off, or something else has happened, then this code would come up.

I would disconnect battery for 1 minute, and reconnect and see if the warning light comes back on.

Just remember you might lose your radio code if you do this.

Let me know how it goes...
PLease vote if you liked this response.

Jul 16, 2010 | 2003 Chevrolet Cavalier

1 Answer

1981 Toyota Hiace (18R) Charcoal canister leaking petrol.


This sounds overfilled to me. Liquid should not get to the canister, only vapors, look for exactly what separates and stops liquid fuel, somewhere along the vent line... Sometimes on top of fuel tank.

BUT, it sounds like you are seriously overfilling. Gas comes out of the ground cool, then heats up in your tank. Put much less fuel in gas tank.

Fuel no longer lubricates anything, so no issue with full time LPG, but starting is commonly an issue, and most designs start with gas and cross over automatically to LPG, after warmed up.

Doc

Sep 15, 2009 | 1995 Toyota Tacoma

1 Answer

Just replaced fuel pump on an 86 camaro (tpi). started but have fuel running out of the bottom of the charcoal canister. sending unit fuel lines crossed?


HI...
Yes the more probable is a fual line crossed.
you need to identify the pressure line. vacuum line and the return line.
The pressure go to the fuel filter.
The return go to the fuel tank. by the pump housing.
An the vacuum to the canister.

OK... I hope this help on your problem.
Thank you for use fixya.

Jul 24, 2008 | Chevrolet Camaro Cars & Trucks

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