What does the egr valve do?and what does it do to a car if you have a bad egr valve?...what about performance wise?
Read above description, but forget the heating part. The EGR valve was developed as a way to reduce pollution. It always detracts from performance. I have been successful at lowering emissions by using either a platinum, iridium, or titanium tip spark plug. It reacts with the fuel,a dn lowers emissions while increasing power output because the fuel burns more completely, and the spark plug tip remains cooler and more ready to firs again. You can remove the EGR valve. On most cars it is held in place with 2 screws (bolts). Clean the thing out with Gum-out, focus on the internal diaphragm, and re-install it. I've only seen a few of them actually go bad. Also, clean out the base from which the valve was removed. If they get TOO clogged up, you will have to use a sharp object to force out the carbon. Sometimes compressed air helps. On cars that DON'T have an electronic monitor of the movement of the EGR diaphragm (something that will trigger a check engine light), I usually just block off the vacuum with a ball bearing or bebe pellet. Usually, more power is produced since the combustion chamber is now cooler. The EGR valve allows burnt exhaust gas to re-enter the intake manifold. Obviously, this causes carbon build-up and dirtying up the inside of the intake manifold. Use the Gum-out to clean the intake, therfore, as well. Smoother power and better economy will result. Good LucK!!
The EGR stands for Exhaust Gas Recirculation. Exhaust gas is routed back into the combustion chamber because the exhausted air is much hotter than the intake air (try touching a muffler sometime). By sending warmer gas into the combustion chamber, the air/fuel mix does not have to do as much work to heat up, and your engine runs more efficiently. As far as fixing it yourself, it's an electronic part. I'd say you're better off having a mechanic or experienced friend do it for you.
can an egr valve cause a car to stall or misfire?
