Question about Pontiac Cars & Trucks
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Posted on Jan 02, 2017
under the hood usually to the right or left of the engine black in color with two lines coming out of the top of it it can be to the back of the engine near the fire wall or it can be up front near the battery.
Posted on Jan 02, 2010
SOURCE: Need illustrated 'shop manual' for a 1997 Pontiac Montana 3.4L in particular a picture of the canister purge valve and related vacuum hoses--for the valve and adjacent evap switch device? Thank you!
Hi Bruce,here's a AutoZone repair guide showing you your canister purge valve. Repair Guides Component Locations Component Locations 1 AutoZone com
Posted on May 18, 2017
Testimonial: "I appreciate the help. Will use Auto Zone guides in the future. But, the picture is of an EGR valve my problem was a canister purge valve question which now has been answered. Thank you"
You need to have a full function live data GM OBD2 scanner.
Posted on May 18, 2017
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This DTC checks for undesired intake vacuum flow to the EVAP system. The control module seals the EVAP system by commanding the EVAP canister purge solenoid valve OFF and the EVAP canister vent solenoid valve ON. The control module monitors the fuel tank pressure (FTP) sensor to determine if a vacuum is being drawn on the EVAP system
If vacuum in the EVAP system is more than a predetermined value within a predetermined time, this code is set and the MIL (malfunction indicator lamp) is illuminated.
Symptoms of a P0496 DTC will include MIL illumination, and most likely no other noticeable symptoms. Some may experience a hard start / crank condition. In some cases the engine may run rich which may not detected, but can cause damage long-term (think: catalytic converter damage).
Potential causes of a P0496 EVAP code include:
The most common fix for this DTC is to replace the purge solenoid valve. However, be sure to do a proper diagnosis before replacing parts!
Ideally you would use an advanced scan tool, with the ignition on and engine off, you seal the EVAP system using the Seal/Purge function. Then, watch the fuel tank pressure sensor reading when you turn the purge off. If the pressure value is higher than the normal range set by the manufacturer, replace the EVAP canister purge solenoid valve. Refer to a model-specific repair guide for the proper specification.
If you don't have access to the scan tool, you could always disconnect the vacuum line at the purge valve going back to the charcoal canister. Unplug the electrical connector on the purge valve, start the engine, then put your finger on the valve where you disconnected the line. If you can feel vacuum there, the purge solenoid valve is faulty and needs to be replaced. Alternately, you could simply remove the purge solenoid valve and blow into it. It is normally closed, so if air goes through then you need to replace it.
If the purge valve checks out good, either the problem with the valve is intermittent or there is a problem with the fuel tank pressure sensor. To test the fuel tank pressure sensor you will need to have a high end scan tool to monitor the tank pressure with the gas cap removed. If the sensor shows vacuum with the gas cap removed, there is a problem with the fuel tank pressure sensor.
Here is a picture of one purge solenoid valve. Yours may look similar or different, consult a factory service guide or your local vehicle dealership for more details.
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Aug 22, 2012 | Cars & Trucks
Nov 07, 2011 | 1997 Nissan Sentra
May 21, 2017 | 1995 Subaru Legacy
P1441 Evaporative Emission System Flow During Non-Purge.
The vacuum system/Evaporative recovery system. Evap. (vapor cannister) code MAY be as a result of excessive fuel flow into the cylinders overloading the cannister's capacity. Possible cause is a failing Oxygen sensor giving a "Lean" indication to the engine computer, causing more fuel than is needed to be injected into the cylinders and captured by the vapor system. Trying to keep track of the changing readings may be taxing the computer's memory. Have the oxygen sensor checked. If it is functioning correctly, check for vacuum leaks, cracked or broken vacuum hoses.
Take you car to a professional as this is going to take some skill and knowledge to repair. Dont keep buying parts to fix the problem as this will get very expensive.
Here's a link to codes and what they mean http://autorepair.about.com/cs/troubleshooting/l/bl_obd_main.htm
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