Question about 1999 GMC Sierra

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Where is the EGV valve or switch - 1999 GMC Sierra

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All EGR Valves send exhaust gases to intake,so follow that logic and look for vacuum hoses/elec connectors. The switch is another item you may or may not have. Sorry While I have a GM,Ford & Dodge I do not have your exact veh

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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I have a 2001 Hyundai Elantra EGV and the check light engine light is on and experiencing a "high pitch sound" when accelerating from 20 km/hr and up...quite loud on the highway...sounds like a 747...just...


IF you dont see gas puddles, it could be emissions cannister that is having a problem. Might be expired or it might be having a valve sticking open. See if there is an autoparts store that reads the error codes for free.

Aug 30, 2013 | Hyundai Elantra Cars & Trucks

2 Answers

My 1998 mountaineer has oil leak, one mech said at 196K engine is shot and need to dump it. 2nd mech said could be breather screen plugged, causing pressure build up, and thus oil leak. also mentioned a...


Doesn't it seem odd to you, that two mechanics can't seem to get
involved enough to try and at least sound like they know the business
their in?

You didn't say what leaks,where it is,how,when,etc

Did they say the leak is fixable?

The EGR Valve,hoses & such, would be a good place to start

Why didn't they do that?

All this talk & no attempt to resolve a thing

We get thousands of people a week on this site alone,
what is going on with these shops,any idea?

Feb 10, 2013 | 1998 Mercury Mountaineer

2 Answers

Starts but won't stay running


sounds like a bad throttle position sensor or a fuel pressure regulator. also check the idle air control vavle

Nov 05, 2012 | 2002 Oldsmobile Silhouette

1 Answer

On my 1990 ford truck when I first start it up the check engine light comes on. When I start to take off it starts to stall and spit back . You can keep patting the gas pedal and it will pick up speed and...


Check out your Thermal vacuum tree and your Thermostat. The scanner may be blaming the part when in fact the part does not have vacuum until the engine reaches a certain temperature. A weak Thermostat will prevent the engine from changing the Ignition timing quickly.

Some of the engines used water temperature as part of the choke system. The Thermal vacuum tree would route the vacuum to different dashpots and solenoids. Not only would cold temperatures activate RPM increases, but separate dashpots would trip when the engine was hot enough to run without the choke stepup and drop the RPM down to curb idle.

This made choke settings hard to set because it took so long to cool down the block to make further adjustments. The Ignition advance was regulated by water temperature so the stalling and spitting back is from retarded timing.

Remember to use your scanner to wipe the memory clean after each repair. Look for the Vacuum routing label under the hood to make sure the hoses are correct.

Jan 29, 2011 | 1990 Ford F150

3 Answers

Ford Taurus. Check Engine Light Code P1400


P1400 Exhaust Gas Recirculation valve position sensor
P1401 Exhaust Gas Recirculation valve position sensor
P1402 Exhaust Gas Recirculation metering orifice restricted
P1403 Exhaust Gas Recirculation differential pressure sensor
P1404 EGR Temperature Sensor circuit
P1405 Exhaust Gas Recirculation Differential Pressure Feedback Sensor upstream hose off or plugged
P1406 Exhaust Gas Recirculation Differential Pressure Feedback Sensor downstream hose off or plugged
P1407 EGR solenoid -No Flow Detected
P1408 EGR solenoid -Flow out of Self- Test Range
P1409 EGR Vacuum Regulator solenoid circuit malfunction
---
The sensor for the EGR Valve position is not functioning correctly.

Oct 16, 2010 | 2002 Ford Taurus

1 Answer

2002 Ford Windstar Van


When it is jerking does it nealy stall, if so thats why the alt light flashes, almost stalling.

Have engine "scanned"

Mar 30, 2010 | 2001 Ford Windstar

1 Answer

1996 Chevy Lumina EGV Valve Replacement


I believe you mean the EGR valve

If this is a 3.1 Liter,..it's located on the drivers side, on top of the engine. It's bolted down with (2) bolts, mounted vertically, and has a wiring harness attached to the top of it. It has a black plastic top,circular in shape, about 4 inches tall. After removing it, invert to show underside & try cleaning the orifice (with the recessed screw) with a soft brass brush & carb' cleaner....to remove the carbon build-up which causes poor running & "service engine soon" light to display. If carefully removed, the gasket can be re-used,..if it gets damaged, one can be purchased at a automotive parts supply.

If you plan on doing a lot of your own work on this van, I suggest buying a Haynes or a Chilton Manual from a local car parts store for you van, they can give you instructions on everything

Oct 21, 2008 | 1996 Chevrolet Lumina Mini

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