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Old 03-17-2007, 02:35 PM   #1
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Ugh this car..

Well good news and bad news.

Good news: I took the car to Advanced Auto for a second opinion on the bad cat. They ran their scan on the CEL and they're saying it's coming up with an O2 sensor malfunction sequence 2. I hope they're right. The guy at Auto Zone ran his computer, got a code, looked it up, and goes "well looks like you have a bad catalyic converter." I'll never go to AutoZone again :) I was going to buy the O2 sensor at advanced auto but the guy said there are two for the car, an upstream and a downstream. Rather than guess, I figured I'd ask you guys. Sequence 2 O2 sensor - is that upstream or downstream. I'd like to do this myself, how hard is it to replace?

Bad news: RIGHT AFTER getting my car diagnosed and getting a price on an O2 sensor, I go to leave, hop in my car, try to start it, and the key won't move to turn on the car. I tried for twenty minutes - moved the steering wheel around, pushed the clutch in and out etc. and nothing. It just wouldn't turn. I had to get the car towed to my house. How do I fix this problem and how much will it cost?

Also: The car shakes and bumps pretty harshly at speeds over 50 MPH. I'm thinking the wheels just need to be balanced.


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Old 03-17-2007, 02:50 PM   #2
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Well.. With the Sequence 2, That is downstream IIRC (Wait for someone to double check or correct me)

The key problem is your cylinder in the car, its around 100 dollars, and there is a howto to replace it.

For the shaking, i would pay to have the lifetime alignment at the participating vehicle place near you, and get the wheels balanced and a new alignment..

With the money you saved on this car, you might end up investing it to fix it, it sounds like the previous owner ditched it because of the problems, and the place you bought it from is shitting on you.

sorry man, but i will try to help as much as possible..

Also, get a small mallot, and put the key into the ignition, then tap it and try to turn it, in some cases this had been known to help remedy the situation enough to get it replaced.. just a heads up.. sorry i cant help much..
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Old 03-17-2007, 03:04 PM   #3
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I would like to fix most of the problems myself in order to save some money. The guy at Advanced auto said the O2 sensor is a pain in the ass to replace on some cars. It depends where it is. Where is it on the Focus?

Can you send me a link to the howto guide to fix the ignition cylinder? What tools will I need to replace the O2 sensor and ignition cylinder?

PS: Ironically, the car arrived a few minutes ago at my house, I put the key in and the car turned and started. I don't know why this is happening, but I am going to replace this anyway so that way I don't get stranded again. Good thing I opted for roadside assitance with my insurance company.
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Old 03-17-2007, 03:15 PM   #4
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Do a search on "Ignition cylinder", there's lots of threads.
PM Mike (B16) on this list, he works for Ford and can send you a cylinder made to match your key for $65 or so.
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Old 03-17-2007, 05:30 PM   #5
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o2 sensor

The downstream o2 sensor is simple to do. Run the car, jack it up. You'll need a 22mm combo wrench. The downstream o2 sensor is the piece of with the wire coming out of it on the exhaust pipe right in front of the oil pan. Dead simple to do. The most difficult part is jacking up the car.

The Denso o2 sensor is a good value - a mom 'n pop auto parts place should have it for under $50. It includes the anti seize compound you'll need. The reason I suggest doing this immediately after running the car is because removing it will be easier. Just watch your knuckles and you're good.
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Old 03-17-2007, 05:42 PM   #6
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The downstream o2 sensor is simple to do. Run the car, jack it up. You'll need a 22mm combo wrench. The downstream o2 sensor is the piece of with the wire coming out of it on the exhaust pipe right in front of the oil pan. Dead simple to do. The most difficult part is jacking up the car.

The Denso o2 sensor is a good value - a mom 'n pop auto parts place should have it for under $50. It includes the anti seize compound you'll need. The reason I suggest doing this immediately after running the car is because removing it will be easier. Just watch your knuckles and you're good.
Alright, I'll give it a shot. You're talking to a total car dummy here. When I jack it up, do I jack up the rear?.. not quite sure where the oil pan is. What exactly does it look like? Bolt off, bolt on?
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Old 03-17-2007, 05:53 PM   #7
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the 02 sensor is easy as hell to do. if u can unscrew a bolt, u can undo a 02 sensor. just need an 02 sensor socket. it has a piece taken outta the socket for the wires.

socket looks like this.
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Old 03-17-2007, 05:56 PM   #8
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Quote:
Originally Posted by Revolver123 View Post
Alright, I'll give it a shot. You're talking to a total car dummy here. When I jack it up, do I jack up the rear?.. not quite sure where the oil pan is. What exactly does it look like? Bolt off, bolt on?
front of the car bro.just look for a big piece of metal bolted on to your exhaust pipe just past the engine. and also, dont knick the o2 sensor on anything while installing it, they are pretty sensitive.
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Old 03-17-2007, 06:29 PM   #9
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Ok so to get this straight - I need to get a special socket to undo the O2 sensor from the exhaust. Then I'm going to jack the car up from the front and look underneath for a big metal bolt with wires bolted into the exhaust past the engine. Then I unbolt that, being careful not to mess with the wires, take out the O2 sensor, put the new one in, bolt it, and I'm good to go?

Also how will I know that I'm unscrewing the downstream one and not the upstream
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Old 03-17-2007, 07:42 PM   #10
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the downstream one is after the catalytic converter (the big boxy thing under the heat shield. it's the one thats furthest (downstream) from the motor.
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