Question about 2003 Chevrolet S-10

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Chevy s-10 fuel system

I'm getting some kind of vacuum back-up where i can't put fuel in unless i un-hook vacuum hose from charcoal canister under neath don't want to replace everything but don't know how to narrow down what is defective

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Sounds like the tank vent is plugged. This is generaly a pipe or hose on the filler neck of the gas tank. Pulling the hose on the canister is allow the air to escape there instead of the filler neck.

Posted on Nov 26, 2008

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What should I check with code 0455 for 99 Ford Ranger


The Evaporative emission system has a large leak allowing fuel vapors to escape to the atmosphere . There are hoses an a purge solenoid ,a vent solenoid ,charcoal canister to store fuel vapors in . The charcoal canister is located under the vehicle near the fuel tank an has vapor lines running to the front of the vehicle to where the engine draws in the vapors by the engine computer opening the purge solenoid ! Any of this vapor hose could have a hole (leak) ,the gas cap could be lose or bad . The fuel filler neck could be rusted through ! At the repair shop we hook up a smoke machine to the system an look for a leak like that ! easy !

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I have a 2003 S-10 crew cab with the V-6 vortec engine my service engine light came on showing a po442 fuel system vacuum leak and then when i went to fuel up fuel is backing up so i unhooked vent hose...


This is either going to be the charcoal canister being full or plugged, or the hose being colapsed or plugged. Try a new hose first, then the canister.

Jul 29, 2008 | Chevrolet S 10 Cars & Trucks

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When I put gas in the tank, the pump cuts off several times like its full which it isn't. Any idea what causes that.


The vent valve is stuck closed or you have a pinched hose . It has to do with the Evaporative emission's system ! There is a charcoal canister under the vehicle that stores gas fumes and a vent valve that allows the air in the tank to escape while fueling the vehicle, an during use fuel expands an the fuel vapors get stored in the charcoal canister an at times the engine control module turns on a purge solenoid that is connected to a engine vacuum supply allowing the fuel vapors to drawn into the engine to be burned ! Fixing Car Where The Gas Pump Keeps Shutting Off As You Try To Refuel

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1 Answer

96 s10 2.2 man 2 wd code 440 ?


A diagnostic trouble code (DTC) of P0440 is telling you that your vehicles computer (PCM) has detected a leak somewhere in your vehicles EVAP system. A little information on the function of the EVAP system; when your vehicle pumps fuel to the engine basically it builds up pressure that is sent back to the fuel tank and then that pressure is sent back towards the engine and is stored in a canister usually under the vehicle by the fuel tank. That pressure is sucked out of the canister by the vacuum of the engine...into the intake system of the engine and out the exhaust. That's a basic way of putting how the system works. What P0440 is saying is that somewhere in that EVAP system is a leak. About half the time it is a faulty gas cap. Due to the age of the vehicle that's the most likely cause. If the seal to the gas cap looks good and it seems to tighten up good when put on, you will want to check all the lines and seals at some of the solenoids and hose connections in that system. Also check the canister itself for cracks. If able to hit on the canister or even remove it and shake it. There is charcoal that seems to be real loose like there is a bunch of little rocks in the canister, you may have a blockage in the system and the back pressure is blown out which in turn makes a leak. If I remeber correctly the evap canister is behind the fuel tank but still on that left side more. It's kind of hard to miss. Hope this helps you.....

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My 1995 Camero 5.7 litter shuts off after driving for about 10 minutes, after letting it sit for a few seconds, starts back up then does it again, and I can smell fuel coming from the engine... what could...


charcoal canister filter in emissionscontral system could be clogged,check the lines hooked to it for splits or dry rot, it should be locatedin the left fender(drivers side) black round canister with 2 are 3 hoses hooked to it

Dec 28, 2010 | 1995 Chevrolet Camaro

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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

What does code po442means on a 2002 chevy trailblazer


EVAP Emission Control System - Small Leak Detected (1.0 mm). This code can be set when 1. fuel filler cap is not completely tight, 2. when various hoses get punctured or the canister close valve does not seal completely, 3. there is an actual leak in the charcoal canister, fuel tank, or other EVAP system component, 4. if any one of these components are malfunction (a), fuel tank pressure sensor, (b) purge control solenoid valve, (c) canister close valve, or (d) fuel cap. An engine vacuum leak would not set this code, Usaly there is a sensor on fuel tank called Evap controll switch that has failed

Jun 10, 2010 | 2004 Chevrolet TrailBlazer

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2003 chevy cavalier p440 code


This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of alot of parts, including the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicles fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engin

heres some things you can try
Remove and reinstall

the gas cap, clear the code, and drive for a day and see if the codes come back.
Inspect the EVAP system for cuts/holes in tubes/hoses
Inspect for damaged or disconnected hoses around the Evap purge solenoid
Check and/or replace the sensor
Check and/or replace the purge valve
Have a professional use a smoke machine to detect leaks

Apr 06, 2010 | 2003 Chevrolet Cavalier

3 Answers

Check engine light came on, says its a evaporative emission system, code# P0440, what is that?


What does that mean?
This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Possible Causes:
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
Possible solutions:
With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
  • Inspect the EVAP system for cuts/holes in tubes/hoses
  • Inspect for damaged or disconnected hoses around the Evap purge solenoid
  • Check and/or replace the sensor
  • Check and/or replace the purge valve
  • Have a professional use a smoke machine to detect leaks
HTH,

Mike...

Dec 04, 2009 | 1996 Chevrolet Cavalier

1 Answer

BMW 325i 1993 has broken connections on cylindrical thing under mass air flow sensor with blue tube connection that runs next to the fuel lines uner the car. What is it?


This is the Charcoal Canister. It is a part of the fuel tank vent system. If you have broken nipples, where the hoses connect, you will have vacuum leaks between the intake manifold and the fuel vent system which will affect the way the engine runs. You should replace the canister.

You can purchase a new canister at Bavarian Autosport. See the link below.

http://www.bavauto.com/shop.asp?HC1=0&Htarget=search.asp&HCY=1993&HCM=325i&SearchStr=charcoal%20canister

Nov 02, 2009 | BMW 325 Cars & Trucks

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