Egr Block

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Egr Block
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One of the more common codes that I typically see on a 1997-2001 Toyota 2.2L 4-cylinder Camry is a P0401. It is a code that indicates that there is a problem with the EGR System, not necessarily a problem the EGR valve itself. I hear stories of people pulling getting this code and replacing the EGR Valve without doing any testing because they don't know what to test. They spend needless money and still haven't fixed the problem.

There are three parts that will generally make this code appear on your car. Yes the EGR Valve is one of them, but you also have the EGR VSV, and the EGR Modulator. The first parts of inspection will be to check the function of the EGR Valve by pulling a vacuum on it with a vacuum pump. You can get a vacuum pump at and auto parts store for around $20 and even rent one at some stores.

Hook up the pump to the only vacuum port on your EGR valve. There will be a small hose attached, that you will need to disconnect and install your pump onto the same port. With the engine running at an idle you should be able to pump the vacuum pump to create vacuum on the EGR valve. The diaphragm inside the EGR Valve should raise and cause the car to die. If your car does die then your EGR Valve and it's ports are fine. If your car stumbles or doesn't have any change in the way it runs when you're pulling vacuum then you probably have a bad EGR Valve or a clogged port in your intake.

If you think you have a bad valve then you should take it off the engine and test it with the same vacuum pump. You should be able to see the diaphragm inside the valve move as you are applying vacuum. If the diaphragm does move then you may have clogged ports in your intake and may need to have the intake cleaned. If it doesn't move then you should replace the EGR Valve.

However, if your Camry stopped running when you applied that first vacuum then you should start looking to the EGR VSV. I know VS what? It's a small blue solenoid located on the back of the engine block. It will have a couple of vacuum hoses, and a small plug attached all be held up there with one 10-mm bolt. Remove the VSV and test it by applying power and ground from your cars battery (VSV should not be plugged into harness when testing.) If you hear the VSV click when you apply power then you should replace the EGR Modulator.

The EGR Modulator is located to the right of the EGR Valve above your intake. It will have several vacuum hoses coming off of it and slides into a holder. The EGR Modulator can be purchased relatively cheap at your dealer. There is no easy testing for the modulator. If you replace the modulator and still have a problem and the light comes back on, you should then replace the EGR VSV also known as the Vacuum Switching Valve. Sometimes the VSV can have an internal break and still click when you put power and ground to the terminals, but still be bad.

So you could be wasting your money by just throwing on a valve. Remember the only way to fix something right is to know the proper testing procedure so you can come to a correct fix.

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2008 Mercedes-benz C-class at the New York International Auto Show

DaimlerChrysler maker of Mercedes vehicles and quality Mercedes tail light guard will present its fourth generation Mercedes-Benz C-Class sedan in an official North American debut at the upcoming New York International Auto Show which will open to the public starting April 6 to 15, 2007 at the Jacob Javits Convention Center in Manhattan. The next-generation 2008 C-Class sedan is slightly bigger than its successful predecessor and was made even more agile, comfortable and safe.

The appearance of the new mid-size C-Class reveals the latest Mercedes design idiom that is characterized by the edgy interplay of taut lines with wide and rounded surfaces. The revised suspension and steering of the new C-Class makes it more agile along with a new slick-shifting six-speed manual transmission for the C300 Sport model.

For the US market the new C-Class will be launched this fall with three V6-powered models namely the C350 Sport, the C300 Luxury, and the C300 Sport. Both the C300 Sport and Luxury models will be available with an all new 4MATIC all-wheel-drive system that is mated to a seven-speed transmission. Standard equipment includes a power sunroof, eight-way power front seats with lumbar support, two-zone automatic climate control, 17-inch wheels, Bluetooth connectivity and a central controller with a seven-inch display screen.

Here is the list of the 2008 Mercedes-Benz C-Class Preliminary Technical Data:

C300, C300 4MATIC; C350

Vehicle type - Four-door, five passenger sedan

Body - Steel unit body; aluminum front fenders, doors hood and trunk lid

Aerodynamic drag (Cd) - 0.29, 0.30

Frontal area (sq. ft. / m2) - 2.17, 2.18

Engine - 90-degree V6

Material - Aluminum block and cylinder heads; iron cylinder liners

Valve design - Four valves per cylinder

Valvetrain - Double overhead camshaft per cylinder bank;

Duplex chain driven; variable valve timing

Intake System - Two-stage intake manifold, tumble flaps

Fuel System - Sequential multi-point electronic fuel injection

Ignition System - One centrally mounted spark plug

and ignition coil per cylinder

Emission controls - Internal EGR, secondary air injection,

Two three-way catalytic converters with linear oxygen sensors

Displacement (cu. In./cc) - 182.7 / 2996, 213.5 / 3498

Bore (in./mm) - 3.46 / 88.0, 3.66 / 92.9

Stroke (in./mm) - 3.23 / 82.1, 3.39 / 86.0

Compression ratio - 11.1 : 1, 10.7 : 1

Horsepower (SAE @ rpm) - 228 @ 6,000, 268 @ 6,000

Torque (lb.-ft. @ rpm) - 221 @ 2,700 – 5,000, 258 @ 2,400 – 5,000

Max. engine speed - 6,500, 6,700

Automatic Transmission - Seven-speed, adaptive shift logic and Touch Shift

Manual Transmission - Six-Speed (RWD C300 Sport only)

About the Author

Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.

1995 gmc 350 egr and cts sensor trouble codes will not clear!!!!!!!!!!?

I have changed the coolant sensor twice, the egr solenoid, ecm, rotor cap, dis. cap, ignition module, ignition switch, plugs, wires, map sensor, fuel pump assembly. I replaced the block and heads out of a 92 chevy... I need to change the oil pressure sensor( it broke off...) The truck is hard to start when hot(have to hold the gas to the floor to crank, and drive a block or so and then it runs fine until you mash the gas pretty good, then it bogs down for a sec then straightens back out.... It will cruise pretty good, as long as your easy on the gas, acts normal even up to 85 mph, but if you shut it off it starts all over( hard to start and burning really rich)

change oil pressure sensor than look for leaky or bad injectors also check for vacuum leaks

EGR janitors keep jobs, administrators take cuts
A full auditorium of residents listened last week as the East Grand Rapids Board of Education heard budget committee recommendations for reductions.

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