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Originally Posted by saturnspeed_12
your car is obd 1 so it has 1 oxygen sensor before the cat. and if a car has been running rich for a while it will clog a cat up bad. now to clean up the intake manifold you can try pouring seafoam through the pcv and let the engine suck it in but go slowly or it will die. but that wont get rid of everything so its best to remove it and starting fluid does a pretty good job at cleaning it away, but the most effective that most guys do is pour gas into it and all over the build up spots, then set it on fire.
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Whoops, guess I'm just used to my honda, lol. Used to having two sensors... I would probe the wires to make sure I'm getting the right voltages, but if I wasn't my check engine light should be on...
Well, I figured if I was going to remove it I was going to soak it in that purple power stuff. It did wonders on my egr valve, rinsed it off, and after that, only a little was left to be removed... However, my egr passages on the engine itself are pretty carboned up... and I doubt pouring gas on them and then setting it on fire would be the best idea when its inside the engine... Thats also part of the reason I was wondering about the egr passages... whether they were on the intake side, or exhaust side, so I could get to them easier to clean... Unless I have to take off the valve cover... Which is something I'm planning on doing this weekend anyway, since I want to see what type of condition the engine is in. Well, the top half anyway, lol... And yes, it HAS been running rich ever since I got the car (back in dec/jan I believe).
My cat doesn't seem to be clogged however, since I still have some really nice and good performance... And I really don't have any difficulty running the car at all... Nothing that would indicate a blocked cat... Unless you might have some suggestions as to how to test it... Would stuffing a rug into the exhaust pipe, and it pushing it out be a good experiment? But then again, I have a slight hole in my muffler anyway, which I'm going to be fixing today... Damn rust, lol.
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now about it still running rich, what kind of gas mileage are you getting? and did you replace the connector on the ects too because they can corrode up inside and into the wires and you will never know which will cause problems.
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Thats the crazy part.. I'm getting 27-29 mpg... (its been going down about 1 mpg per 3k miles I guess... not really sure, since I just recently did my two fillups last night and got my 27 reading... However, about two months ago, it was at 29...
Now, I know what they say, if it ain't broke(or not too broke), don't fix it. But I love tinkering and fixing things that are slightly wrong.
And no, I didn't replace the connector... The old ects I had pulled out was also a brass one, but was heavilly corroded. It looked like a saturn dealership job, because the connector, for being what, 14 years old? looked in really good shape... No corrosion around the connectors at all... I could always probe them to make sure the voltages are being sent correctly, and that would tell me if the connector is bad or not. The new one I had bought from Advance. They now also have the brass tipped ones, just so everyone knows, otherwise I would've went to saturn.
I stopped by Autozone today, and asked a guy if he knew of any good way to clean carbon out of a intake... he suggested the seafoam spray...
He suggested the following:
1. With engine running, spray it into pcv/brake booster lines)
2. With engine off, yet hot, open throttle plate, and soak the mo-fo, let sit for a while, and then start it up, and then finish off with a second treatment (with engine running) to break up anything else.
So I figured, It can't hurt that much, not much different that reg seafoam, as far as I'm concerned... also, the new gaskets themselves aren't all that expensive...
I'm also thinking about investing in a parts cleaner... they had a nice one on sale at Advance... I think it was a 20 or 30 gal w/ everything included for 69.95, reduced from I think around 110.00. Still sounds a bit high, but not too bad for a retail store, lol.
Sorry for the delayed response... for some reason, the forum didn't email me when someone posted here...
Thanks saturnspeed for all your help... (In the past, and into the future
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