So that pesky check engine light is on again and they keep telling you its your 'EGR' system. They say this and that, but honestly, it tends to be a bit confusing. Here's the scoop, it's designed to reduce tailpipe emissions.
Okay, they already told you that and it doesn't help. Flashback to pictures of cars from an era where they would puke black smoke from the tailpipe. Standards were set on car manufacturers to reduce that...a lot. So the first and most obvious plan was to pull some of that back through the engine and burn it again. Unfortunately, not all of the fuel that goes into your engine gets burnt. Some of your precious dollars were flying out of the tailpipe. By burning the same air a couple times, more material was burnt up and fuel economy increased. Both are big bonuses.
The problem is, already burnt and sooty air is pretty dirty. These systems get filled with this soot and before long the valves and tubes get clogged or won't work. The car tells the valves to open at certain times and it just sticks because its all...well, sticky. This valve is called an 'EGR valve'. This is the most common point of failure.
As engine efficiencies increase through new technologies, less waste flows through the exhaust air. Newer systems tend to foul out less often, but ultimately, burnt air is dirty and will cause problems.
If you have any question or comments, please let us know. Have a check engine light? We scan at your door for $35.00.
12/3/2013 05:36:53 am
check engine lites are free at most all auto stores...
12/3/2013 06:24:33 am
Check engine light quick scans are available for free. They will recommend the most common repair items to sell you but they do not guarantee a repair. Also they are not certified technicians. I've known people who repeatedly go to the parts store for the same code and replace hundreds of dollars worth of parts when they could've replaced one part and saved a lot of time and money. The difference is proper diagnosis.
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Erik and Jennifer are the owner/operators of Mobile Service Pros. We enjoy working with our customers and community.