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Joined: Sep 2002
Posts: 1,788
Hard-core CEG\'er
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Hard-core CEG\'er
Joined: Sep 2002
Posts: 1,788 |
The front upper sensor is a piece of cake. If you can't find it, you should give up and take the car to a shop. Removing that plastic cover helps to see it from the top.
Steve
98 Contour SE Sport 2.5 Duratec ATX The wifey's car
89 Taurus SHO - 246K miles
94 SHO ATX - 190K
1997 F-150 5.4L ATX - The Workhorse 150K.
ANY THREAD WITH "OMG" or "WTF" ETC IN THE TITLE WILL BE IGNORED!
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Joined: Nov 2001
Posts: 48
New CEG\'er
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New CEG\'er
Joined: Nov 2001
Posts: 48 |
Two years ago, I did both upstream sensors on Mom's Mystique, so I anticipated the pain for doing the Bank 1 #1 sensor on my car today. It took me 3 1/2 hours, plucking out the wiring to the PCM, severing the pigtail to the sensor, a 22mm wrench and a 5-inch crescent wrench before I got the car back up to snuff. How the heck do the mechanics do it?  AND make any money? BTW: Can an O2 sensor go bad for years before the PCM tumbles on to it? When I fired up the car, the rotten egg smell was all gone, but it been there since early '03... and the CEL had been on for only 2 weeks.
Black/tan early '98 Contour SE Sport; dead-dead-deadsky (gone, split, outta here, afterlife kids)
'05 Pontiac Sunfire; 2.2L Ecotec, ATX, well-equipped
Mom also has black/tan '98 Mystique LS; V6, ATX, Alpine CD deck
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Joined: Oct 2003
Posts: 79
CEG\'er
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CEG\'er
Joined: Oct 2003
Posts: 79 |
I used a low profile O2 sensor socket that work out pretty good on bank 1 and bank 2 sensors,BTw did anyone have all the 02 sensors pictures? I really can't find any sensors other than the two I had replaced.
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Joined: Nov 2002
Posts: 851
Veteran CEG\'er
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Veteran CEG\'er
Joined: Nov 2002
Posts: 851 |
Originally posted by April Thompson:
BTW: Can an O2 sensor go bad for years before the PCM tumbles on to it?
Yes. The O2 sensor degrades in a linear, analog manner, slowly getting worse as time goes on.
The PCM, however, considers the O2 sensor to be in either one of two states: "good" or "bad"--which it isn't.
It's like shades of grey vs. black and white.
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Joined: Nov 2001
Posts: 48
New CEG\'er
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New CEG\'er
Joined: Nov 2001
Posts: 48 |
I got a fun thing now: throttle hang. I change the sensor, now the engine runs for a second at 2000 RPMs, then drops to 1250 for half a minute before settling at AROUND 1000. Before, I would start up and it would waffle a bit before sticking at 750, but feel sluggish at low RPMs, even with functioning butterflies. Now, it's so eager to rock, it revs into action straining at the end of its leash. Sigh. Can't win for losing sometimes... 
Black/tan early '98 Contour SE Sport; dead-dead-deadsky (gone, split, outta here, afterlife kids)
'05 Pontiac Sunfire; 2.2L Ecotec, ATX, well-equipped
Mom also has black/tan '98 Mystique LS; V6, ATX, Alpine CD deck
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Joined: Nov 2001
Posts: 48
New CEG\'er
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New CEG\'er
Joined: Nov 2001
Posts: 48 |
Originally posted by zzzcool:
I used a low profile O2 sensor socket that work out pretty good on bank 1 and bank 2 sensors,BTw did anyone have all the 02 sensors pictures? I really can't find any sensors other than the two I had replaced.
They're in the Y-pipe on V-6 models: Bank 2's is actually quite visible near the oil pan. Bank 1's is just above the bend of the pipe, where it fits to the manifold. PITA to reach, quel surprise. Follow the leads with bright blue connectors, if all else fails.
Black/tan early '98 Contour SE Sport; dead-dead-deadsky (gone, split, outta here, afterlife kids)
'05 Pontiac Sunfire; 2.2L Ecotec, ATX, well-equipped
Mom also has black/tan '98 Mystique LS; V6, ATX, Alpine CD deck
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Joined: Nov 2002
Posts: 851
Veteran CEG\'er
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Veteran CEG\'er
Joined: Nov 2002
Posts: 851 |
The bright blue connectors are for the downstream/post cat sensors. The upstream sensors are going to be probably 5" above them.
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Joined: Nov 2002
Posts: 851
Veteran CEG\'er
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Veteran CEG\'er
Joined: Nov 2002
Posts: 851 |
Disconnect the battery for a few minutes--see if that fixes the throttle hang.
If not, maybe try cleaning the throttle body.
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Joined: Nov 2001
Posts: 48
New CEG\'er
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New CEG\'er
Joined: Nov 2001
Posts: 48 |
I want to get all the intake gaskets, as well as the TB, IAC and misc. gaskets so I can clean them all at once. But, yeah, the TB is filthy.
Black/tan early '98 Contour SE Sport; dead-dead-deadsky (gone, split, outta here, afterlife kids)
'05 Pontiac Sunfire; 2.2L Ecotec, ATX, well-equipped
Mom also has black/tan '98 Mystique LS; V6, ATX, Alpine CD deck
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