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Hey, what's up everybody?? I'm new to the board and I got a '94 Seville SLS...On to my question....Today my friend was revvin my engine kinda hard for just a little bit, and when I headed home today, I noticed that my "Service Vehicle Soon" light came on....When I got home, I turned the car off, and started it back up and the light didn't come back on and still hasn't come back on even after driving around a bit...Also, I now get the trouble code "Code PO36 History"....In another forum I heard that this means a dirty EGR valve...Is this a problem??? The performance is the same as far as I can tell, but I just wanna know if I should be concerned...Thanx in advance and it's cool to be on such a great message board!!
 

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You could clean the EGR valve if you like. Mine does that every now and then but I've never had any problems. I've cleaned the EGR valve a time or two.
 

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My 1991 Grand Marquis with a 5 liter for 3 years flashed "check engine." A computer check said EGR valve, but sometimes the passage gets dirty. It won't effect the vehicle, as long as it is running smooth. Fix it if you are a tree hugger, or concerned about your car, its only an emissions device, don't worry too much.
 
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