Question about 1998 Chevrolet Cavalier
Electronic egr valves primarily gm viehicals .employ a egr valve that is not operated by vacume at all .an electronic solenoid in the valve is operated electricaly by the ecm .diagnosting this type if egr valve require a special scan tool . sorry your probley off to the dealer pal.
Posted on May 06, 2014
Ok, Disconnect it from the Tranny First. This will make it easier to Fish Through. Connect the New Cable on the Tranny. Follow where the Old one Goes with the New one, Removing the Old one as you go. It will enter the Cab and work it's way up to the Sterring Column. You will Need to remove the Dash Panel to Access the Cable on the Shifter, It just Pulls Loose. You are at the Hardest Part of this at this Point. Let me know if you cannot access the Shifter From this Point. Please Rate My Response! Thanks!
Posted on Feb 07, 2009
The egr valve is located at the end of a hose that plugs into youe valve cover. It is pushed right into a rubber grommet that is located in one of the valve covers. I hope this helps. don.t forget to rate my nswer, thanks
Posted on Feb 27, 2009
You could have a restriction in the egr ports. remove the valve. Plug the holes, start engine. 1 hole will be blowing out exhaust, the other will have large vacuum.
Posted on Mar 28, 2009
SOURCE: FAILED EGR VALVE
The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases.
The EGR valve is vital to your car's emission controls.
When the EGR valve goes bad, it must be replaced - it cannot be repaired.
The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on accelertaion.
The only short term problem is a decrease in gas mileage - but it should really be replaced before sensors become sooted or your cat. convertor gets overworked prematurely.
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Posted on Apr 15, 2009
SOURCE: power loss
Can't answer your last question but catalytic convertors that are just not working anymore won't cause any loss of power.
However, if they have shattered inside (they are kind of a ceramic honeycomb) they can dump junk into the exhaust system that can eventually clog your muffler or resonator.
Checking whether this has happened isn't difficult; after the warm up of the engine, either you or a helper needs to listen to the exhaust note. If firing of the cylinders is still distinct, the system isn't clogged with shrapnel; if it seems to hiss at higher RPMs, it is likely clogged.
This effect is easy to miss; I've had two failures and when cold, the engine would pull fine because the chunks of ceramic would fall to the bottom of the muffler and glue together somewhat. Once hot and agitated, they would clog the muffler and cause a severe loss of power but the idle would be OK. A hill that I would normally pull at 70 MPH, I couldn't top at all; had to sit and wait for things to cool down before proceeding.
It also seems some engines appreciate a bit of back-pressure in the exhaust system because the car gained in mileage and pulling power for several thousand miles before the clog became critical causing the mileage to fall sharply along with the power.
Posted on May 23, 2009
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