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Re: olds 2000 silhouette egr replacement
There is no easy way car manufacturers make cars for Assembly not for repair, sorry if this is not what you wanted to hear but its true. that said it may be better to look at it from underneath but please follow all the safety instructions in the owners hand book before going under your car
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The EGR valve and MAP sensor are indeed different and unrelated parts. An EGR valve that is stuck open can however cause the system to set a false MAP sensor code due to the loss of vacuum in the intake which will cause the sensor to read low but the engine should run very bad, if at all, when this happens. The MAP sensor is located slightly to the drivers side of the throttle body housing on the front side of the motor and is easy to replace. I'd make sure that your EGR valve isn't stuck open or that you don't have another large vacuum leak that could mimic a faulty MAP sensor before replacing it however. Hope this helps a bit and good luck!
It's PITA, the EGR valve is located on the back side of engine (Firewall side) You might want to try using Deep Creep from Seafoam to get your upper intake manifold and EGR valve cleaned without removing it. Here is a link to the Seafoam products and it's worth a try first before you go through the pain of removing the EGR valve on your Ventura.
Thank you for using fixya and good luck
Power flushing is usually not a good thing as the heater cores can become blocked.I would suggest to remove the lower rad hose and drain as much coolant as possible.Refill with clear water with lower hose reattached.Bleed system of air as you fill with water and keep filling until operating temp is reached.Drive and return and drain it again the same way,now refill with at least 1 and 1/2 gallons of dexcool and don't forget to add the vegetable based aluminum protector required in your vehicle available from gm and make sure you bleed the air from the system from the valve just to the rear of the rad filler neck on the engine at the end of the coolant pipe running across the front of the engine.
Yes and know,it all depends on your experience with tools but you can do it if your follow instructions and take your time. I'll try to help you save some money and let you know that you can fix thins your self.
A code P0401 most likely means one or more of the following has happened:
The DPFE (differential pressurefeedback EGR) sensor is faulty and needs to be replaced
There is a blockage in the egr (tube), most likely carbon buildup
The egr valve is faulty
The egr valve may not be opening due to a lack of vaccuum
So we are going to remove the egr valve and clean it out with Carb cleaner, remove all the carbon build up that is binding the valve. If that doesn't not work or you thing there is too much carbon or the valve it self is still binding once it's cleaned, then just replace it. The other thing to is to replace the DPFE sensor but were just going to worry about the egr first since that is what is most common and a good cleaning will always almost fix the problem. There is one bolt that holds the egr tube to it and two bolts that hold it to the intake manifold take them out, unplug the electrical connector and its off. Once the egr is off, Spray it clean with Carb cleaner and make sure that there are no moving parts are binding and re-install. If needed replace the old gasket with a new one. Good luck and hope this helps and if your not sure where the egr valve is, it's just behind the throttle body. Good luck and hope this helps, Auto Zone can also give you the step by step instructions to getting the job done and you can also buy the replacement egr valve. But start with the cleaning first.