Hello, I went to my garage last friday because my exhaust emmisions light was on, on my Bora MK4 2003 52 plate 1.6 16V. They said its a faulty EGR valve which could be from being clogged up with sh*t. But they said it would be fine to drive, and that the rough idle wouldn't harm the car, and to unplug it if the rough idle became annoying. Its now sunday 3 days since the garage diagnosed it I drove about 250 miles over these days. With the exhaust emissions light coming on then sometimes going off. I think the EGR Valve keeps sticking closed and the engine is very hard to start. Is there anything I can do to help start the car? which is better having it plugged in or unplugged? how do you take the EGR Valve out and clean it what tools are needed is it complicated. any ideas on how I can help it start ? I've tried unplugging it, it makes no difference really.
The EGR valve or Exhaust gas Recirculation valve is placed on the exhaust gadget. those frequently get hung up with rust and different exhaust deposits. The motorcar might want to be less than production unit assure being in easy words 3 years old. i might want to examine with a broking service to work out if the motorcar and/or section continues to be less than assure. A defective EGR valve will reason the computing device to make the incorrect settings to the gas and air mix causing the engine to run too prosperous or too lean. Its no longer too unfavourable contained in the little while period, yet your gas mielage will struggle through, and also you are able to fail a state inspection so get it repaired previously then.
EGR stands for Exhaust Gas Recirculation, and is not really good for a car. It causes deposits on the back of the valves, and ruins the valve guides. If the EGR sticks, it also won't let the engine start or have maximum power. Unplugging it, and plugging up the vacuum hose, will prevent it from opening if it is closed, but will not close it if stuck open already. What you need to do then is to remove and clean it will chemicals or wire brush, until if closes again. You can also plug it off with a plate underneath it. The only time you ever need EGR is if you have a high compression engine that would have pre-ignition without the EGR being used to poison the mixture and prevent pre-ignition. But if you run premium gas, then you should not need an EGR at all, and you should consider removing and plugging it.
