Question about 1999 Volkswagen Passat

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99 passat smell of fuel through air vents

When the car is idleing you can smell what seems to be petrol coming through air vents,with no codes on obd computer and no leaks

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1 Answer

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  • Volkswagen Master
  • 5,370 Answers

For fuel related problem, the help links are provided below.
Click the link below to go through its procedure: ----

How to relieve fuel pressure?
http://technoanswers.blogspot.com/2012/01/how-to-relieve-fuel-pressure.html
--------
Refueling problem?
http://repairhelpcenter.blogspot.com/2012/01/refueling-problem.html
--------
Car consuming more fuel?
http://repairhelpcenter.blogspot.com/2012/01/toyota-tercel-consuming-more-fuel.html
----------
How to maximize fuel economy on your vehicle?
http://schematicsdiagram.blogspot.com/2011/11/how-to-maximize-fuel-economy-on-your.html
-------
Fuel pump relay troubleshooting ?
http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html
------------
How to Increase gas mileage vehicle?
http://schematicsdiagram.blogspot.com/2011/12/how-to-increase-gas-mileage-on-2011.html
---------
How to Test and Replace Fuel Injectors?
http://repairhelpcenter.blogspot.com/2011/11/how-to-test-and-replace-fuel-injectors.html
-------------------
How to replace Fuel Tank Assembly?
http://vwrepairhelp.blogspot.com/2011/11/how-to-replace-fuel-tank-assembly.html
--------------
FUEL LINES AND FITTINGS ?
http://repairhelpcenter.blogspot.com/2011/11/fuel-lines-and-fittings-on-acura-car.html
------------
Replacing Fuel Charging Assembly on Car?
http://vwrepairhelp.blogspot.com/2011/11/replacing-fuel-charging-assembly-on-car.html
------------
How to replace Fuel Pressure Regulator ?
http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-fuel-pressure-regulator.html
---------------
How to test Fuel Pressure and replace Fuel Pump?
http://repairhelpcenter.blogspot.com/2011/11/how-to-test-fuel-pressure-and-replace.html
--------------
Car will not take fuel into the fuel tank?
http://repairhelpcenter.blogspot.com/2012/01/car-will-not-take-fuel-into-fuel-tank.html
--------------
PGM-FI Main Relay location?
http://repairhelpcenter.blogspot.com/2011/11/pgm-fi-main-relay-on-acura-car-models.html
------------------
How to Relieve Fuel System Pressure on Car Models?
http://repairhelpcenter.blogspot.com/2011/11/how-to-relieve-fuel-system-pressure-on.html
-----------------
How to Replace a Fuel Injector
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-injector.html
----------------
How to Replace a Fuel Pressure Regulator?
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pressure-regulator.html
-------------
How to Replace a Fuel Pump?
http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-fuel-pump.html
-------------------
HOW TO CLEAN A FUEL SYSTEM
http://schematicsdiagram.blogspot.com/2011/07/how-to-clean-fuel-system.html
-----------
HOW TO REPLACE A FUEL TANK
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank.html
--------------
HOW TO REPLACE A FUEL TANK CAP
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-tank-cap.html
------------
HOW TO REPLACE A FUEL PUMP ASSEMBLY
http://schematicsdiagram.blogspot.com/2011/08/how-to-replace-fuel-pump-assembly.html
-----------
How to change fuel injector on gmc ?
http://schematicsdiagram.blogspot.in/2012/03/how-to-change-fuel-injector-on-2005-gmc.html
------------
Time to replace Fuel pump?
http://schematicsdiagram.blogspot.com/2011/12/time-to-replace-fuel-pump-on-1998-ford.html
-----------
Emergency fuel shut switch location?
http://schematicsdiagram.blogspot.com/2011/12/emergency-fuel-shut-switch-on-ford-car.html
---------------
How to jump fuel pump?
http://schematicsdiagram.blogspot.com/2011/12/how-to-jump-fuel-pump-on-chevrolet.html
------------
Car wont start when cold?
http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html
--------
Car wont start after sitting overnight?
http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-after-sitting-overnight.html
---------
Car loses power while acceleration?
http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html
------------
Fuel leaks from fuel pulsation dampener?
http://repairhelpcenter.blogspot.com/2012/01/fuel-leaks-from-fuel-pulsation-dampener.html
----------
Car will not allow to put fuel?
http://repairhelpcenter.blogspot.com/2012/01/car-will-not-allow-to-put-fuel.html
-----------
Adding performance chip to increase Fuel mileage MPG?
http://technoanswers.blogspot.com/2012/01/adding-performance-chip-to-increase.html
--------------
How to test Electric fuel pump?
http://technoanswers.blogspot.com/2012/01/how-to-test-electric-fuel-pump-on-gmc.html
---------
Fuel gauge drops to Empty?
http://technoanswers.blogspot.com/2012/01/fuel-gauge-drops-to-empty.html
-----------
Fuel pump not working on Ford?
http://technoanswers.blogspot.in/2012/01/fuel-pump-not-working-on-1991-ford.html
--------------
Fuel pump has no power on ford diesel?
http://technoanswers.blogspot.in/2012/01/fuel-pump-has-no-power-on-2002-ford-350.html
------------
Pushing on the gas pedal but the car slows down? Gas pedal to the floor and the car slows down?
http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

---------
Ford Fuel pump Relay and fuse location diagram?
http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-relay-and-fuse-location.html

--------
Ford inside fuse box diagram showing fuel pump relay?
http://technoanswers.blogspot.in/2012/02/ford-inside-fuse-box-diagram-showing.html
---------------
Ford fuel pump fuse layout diagram?
http://technoanswers.blogspot.in/2012/02/ford-fuel-pump-fuse-layout-diagram.html
--------------
How to lower fuel pressure on
Toyota?
http://schematicsdiagram.blogspot.in/2012/02/how-to-lower-fuel-pressure-on-toyota.html

------------
Fuel pump not running?
http://schematicsdiagram.blogspot.in/2012/02/fuel-pump-not-running.html
--------------
How to replace fuel filter on BMW?

http://schematicsdiagram.blogspot.in/2012/03/how-to-replace-fuel-filter-on-bmw-525i.html
----------

This will help.
Thanks.

Posted on Mar 05, 2012

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 237 Answers

SOURCE: passat idle problems

id say it was the mass airflow.

Posted on Dec 18, 2009

BCAS1298
  • 3092 Answers

SOURCE: Chech Engine light on

You need find out which o2 sensor is bad.

Bank 1 sensor 1 is the one before the Catalytic converter (upstearm)

Bank 1 sensor 2 is the one after the Catalytic converter (downstream).

Posted on Jan 26, 2010

  • 76 Answers

SOURCE: CEL light flashing-shuddering when idle. 03

A flashing cel indicates misfiring. A common problem is a bad ignition coil. The easiest route for diagnosis is the check the trouble codes(autozone and some other parts stores will scan for free, or an OBDII code reader is not too expensive to buy). The code should tell you which cylinder is misfiring(PO301 means cyl #1, 302 cyl #2, etc). Once you know which it is, swap the ignition coils around. If you have a #1 misfire, swap coils 1 and 4, clear the codes, then check it again. If the misfire moves, you know you've got a bad coil. If the misfire is air or fuel related, as with an intake leak, other codes should come up as well as the misfire.

Posted on Feb 08, 2011

  • 457 Answers

SOURCE: petrol smell inside a VW

CHECK SEE IF THE VENT HOSE FROM FILLER NECK IS RUSTED OUT AND HAS A HOLE IF SO REPLACE IT OR PATCH IT . THIS IS A COMMON PROB AS THE MANURFACCTURE DIDNT PRIMER THIS VENT AND IT RUST AND GAIN A HOLE AND THE VAPORS LEAK INTO THE CAR ON PASSENGER SIDE IN BACK CAN BE REALLY STRON AT TIMES, DONT LET ANY ONE SMOKE IN THE CAR AS THE VAPOR IS HIGHLY FLAMABLE.

Posted on Aug 14, 2011

alicantecoli
  • 22484 Answers

SOURCE: My 2001 vw passat 1.6 petrol failed nct. Emissions

change the O2 sensors and if that doesnt work then its a new cat ,you can test the sensors first if you have a automotive test meter though its easy with the right gear ,the two wires with the same colour should read 12v heater circuit and the other two should read a variation from 8v to 12v depending on engine speed

Posted on Aug 17, 2011

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What makes my Chevy malibu 2005 v6 put system code po449 out


P0449 - OBD II Trouble Code Evaporative System Vent Valve/Solenoid Circuit Malfunction Our emissions expert has put together the following information about the P0449 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
  • OBD II P0449
Fault Code Definition
  • Evaporative System Vent Control Circuit Malfunction
What does this mean? The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions-dictated by engine temperature, speed, and load-the EVAP system stores and purges these captured fuel vapors back into the combustion process. The carbon canister, which stores the raw fuel vapors, utilizes a vent valve that allows fresh air to enter the EVAP system. This displaces the fuel vapor as it's purged into the combustion process. Code P0449 indicates that the evaporative control (EVAP) system vent valve solenoid is malfunctioning. This can be caused by either too little or too much electrical resistance or a mechanical problem with the vent valve itself. Symptoms
  • Check Engine Light will illuminate
  • In most cases, there are no adverse conditions noticed by the driver
  • In some cases, there may be a noticeable fuel odor caused by the release of fuel vapors
Common Problems That Trigger the P0449 Code
  • Missing fuel cap
  • Defective Evaporative Vent Valve
  • Defective or damaged fuel cap
  • Distorted, damaged or cracked Fuel Tank Filler Neck
  • Torn or punctured Evaporative system hose(s)
  • Defective Fuel Tank Sending Unit gasket or seal
  • Split or damaged Carbon Canister
  • Defective or damaged fuel tank
Common Misdiagnoses
  • Fuel cap
  • Evaporative Purge Valve
  • Evaporative Vent Valve
Polluting Gases Expelled
  • HCs (Hydrocarbons): Unburned droplets of raw fuel that smell, affect breathing, and contribute to smog

P0449 OBD II Trouble Code

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1 Answer

Why doses my car smell of petrol now and then when I am driving ?


Chances are the smell is coming from a fuel leak around the engine.
The air vents pull air in from the engine compartment, especially when the car is moving.

Sep 16, 2014 | Cars & Trucks

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Bad petrol smell


In most cases smelling gas inside the car comes from air entering the venting system from the engine compartment. Just a few drops can cause a strong smell. And a small leak may be tough to find.
It could be excess fuel going out the exhaust pipe, but your check engine light should be on if that were the case.

May 14, 2013 | 2000 Ford Focus

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Gas or exhaust smell through vents


This is normally a problem with the air and fuel mixture as your fuel injector may be sending too much gas through the engine and not all is burning. This can easily be fixed by having your engine properly tuned.

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Petrol smell inside a VW Passat 1.8 , build in 2000 in Germany. The problem is more severe near the back right passenger. Note that the tank is exactly behind the back right passenger. This is a right...


CHECK SEE IF THE VENT HOSE FROM FILLER NECK IS RUSTED OUT AND HAS A HOLE IF SO REPLACE IT OR PATCH IT . THIS IS A COMMON PROB AS THE MANURFACCTURE DIDNT PRIMER THIS VENT AND IT RUST AND GAIN A HOLE AND THE VAPORS LEAK INTO THE CAR ON PASSENGER SIDE IN BACK CAN BE REALLY STRON AT TIMES, DONT LET ANY ONE SMOKE IN THE CAR AS THE VAPOR IS HIGHLY FLAMABLE.

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1999 vw passat will start but will not stay started. Cuts off when accelerator released. Will not idle. Fuel and air filters replaced.


check the vacumn pipes like the one to the brake servo for a airleak first ,then the air control motor thingy on the inlet manifold ,iam tired and cannot think straight so this is last question ,remove the idle control motor valve and try cleaning it

Jun 27, 2011 | 1999 Volkswagen Passat

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I GOT A 2000 SILVERADO 1500 OBD CODE IS 421 THE PROBLEM IS I DON'T KNOW LOCATION OR HOW TO FIX THE PROBLEM


Sounds like an O2 sensor, especially if your not experienceing major problems.

Example obd code P0101
1st digit: B-Body, C-Chassis, P-Powertrain, U-Network
2nd digit: 0-SAE (generic), 1 mfg (Manufacturer Specific)
3rd digit:
* 1 Air & Fuel Metering
* 2 Air & Fuel Metering Injector Circuit
* 3 Ignition System (Including Misfire)
* 4 Auxiliary Emissions Controls
* 5 Vehicle Speed Controls And Idle Control System
* 6 Computer Output Circuit
* 7 Transmission
* 8 Transmission
4th & 5th digit - two place fault code 0-99

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VW Passat estate 99 T reg. From start up continual misfire and lack of power until engine is warm. Once warm fault becomes intermittent. There are no warning light on dash. I have replaced HT leads with no...


There may be no check engine light but that doesn't mean there isn't a code in the ECU. Especially with a misfire. I'd have the codes scanned and see what you got. The cannister issue isn't going to give you a misfire it will give you stalling and rough idle.
Lets see what ECU is saying. You can go to Autozone if you don't have a scanner they will scan it for free. If scanning turns out negative than have a cylinder leakage test done. This way we can determine which cylinder has the problem and what the problem is.

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White smoke coming from AC and under hoods smells of burning oil


U HAVE A HEATER CORE LEAK, DOES THE SMOKE SMELL SICKY SWEET? AS FAR AS THE CEL GOES HAVE THE SYSTEM TESTED FOR FREE BY ANY KRAGEN AUTO OR AUTOZONE, JUST ASK FOR A OBD 2 TROUBLE CODE TEST, THEN POST THE CODE BACK HERE FOR US TO LOOK AT AND TRY AND DEVELOPE A FIX STRATEGY.

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1999 vw golf timing belt...


this is a direct quote when I asked about a timing belt on a 99 passat

"The timing should be Good unless you have Problems with a Rough Idle."

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