Okay, so for about 6 months now I've been having some problems.
1) About 8 months ago, I got a CEL (it still comes on after about 20 sec of driving). The code came up as something like 'EGR VALVE SENSOR READING ERROR'. I think that basically meant the EGR valve sensor is not registering a reading. Big deal, the car runs fine. So I left it. The dealer I later went to said they will replace the EGR valve, about $400 out the door. I declined. Oh and about 3 months ago I pulled off my upper intake manifold and cleaned it well, along with the TB and lower intake. The EGR passages were full of crap so I cleaned it out. CEL still there.
2) Within the last week, the car has idled like total crap. The interior lights flicker sometimes at idle. The revs fall to almost 500 at some points. This happens when the car is hot or cold upon start. Once you pass about 1500rpm there is no more roughness.
3) Within the last month, when I stomp on it, I get a slight sulfur smell. No biggie.
4) Within the last month, my gas milage has dropped to 16mpg or less (I do mostly driving around town). I can barely squeeze 200 miles from one tank.
I am currently running on 93 octane and I've tried Redline Fuel Injector Cleaner, it did nothing. I checked the MAF sensor, I think it works. The car doesn't feel much slower if at all. Hell, it feels stronger.
I think I am suffering from either a clogged cat(s), bad O2 sensors, and/or a bad EGR valve. Anyone care to comment?
Oh and sorry for the long post.
