I got my car smoged and i failed the guy told me to check my egr? Whats an

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the blackness

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EGR and how do i fix it cheap? Pretty much the guy told me that my engine airflow was too hot or something. i need to get it fixed fast but mechanics are really expensive and i work as a bagger at a grocery store so its kinda hard to pay for it. any ideas or help?
 
I just got mine replaced.. that and an oil change set me back 435.00 I drive a 1993 lumina z34, which costs a lot more to fix.. so maybe 200 I'd guess..
 
EGR is an acronym for Exhaust Gas Recirculation. Basically it is a valve that sits on top or around your intake manifold. I once new what it's main purpose was, but that was 20+ years ago. If I remember correctly it takes some of the exhaust out of the cylinder after it fires and remixes it with clean air and fuel to be fired again.

One sign this is bad is that your exhaust may smell like sour eggs.

As far as the repair cost.....IDK.
 
The EGR valve takes exhaust gas from your exhaust manifolds and puts it into your intake air. This serves 2 purposes - it cools the detonation charge inside the engine and it promotes fuel economy.

It cools the detonation because the burnt exhaust air cannot be reignited, so the detonation is mildly less than it would be with an engine full of fresh air.

It promotes fuel economy because it pushes less fuel into the engine. If you use 90% fresh air and 10% burnt air, the injectors will only push in enough fuel to combust the 90% fresh air (as opposed to having 100% of fresh air).

Usually, the EGR valve is ONLY active under cruising conditions. For example, if you are on the highway cruising at 70 mph, the EGR valve is probably recirculating the burnt air. However, if you are accelerating hard, the EGR valve is closed, allowing no burnt air to get into the engine.

The EGR valve is usually located on the back of the intake manifold, near the exhaust manifold.
 
that's the egr valve it recirculates the unburned exhaust fumes from the exhaust chamber and runs them back through the engine again to re-burn them,when its not working right though it will cause one to fail a smog test,they cost on average about 40-100 bucks depending on what type car you drive,call a parts store and tell them what type car you have and they can give you a price on one,good luck.
 
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