o2 Sensors

HGFireHazard

HGFireHazard

Member
Apr 10, 2005
460
0
17
Michigan
#1
Alright. I have my dyno date set up for the 24th of this month, and they told me that I should change my o2s. I told them my car has only 52k on the clock but they said to change them anyways. They said that if my readings don't match close to what their wideband is putting out they will change them for me and charge me labor. So I went to Ford and gave them my special number off my door panel yesterday. I came back today and they wanted $249 for 2 sensors! I said no way. They also told me that my car had 4 o2 sensors, but when I put on my long tubes I only remember the bungs at the back right by the collector. Do our cars have 2 or 4? If it's 2 I gotta say that's pretty stinking bad if a Ford dealership doesn't know how many my car has. I'm going to go to Autozone and get some, they is no way in heck I'm paying that much. By the way, they told me they got me dealership price, it would have been MORE if I would have paid customer price. I'll do some more looking on o2s, but if someone could chime in and let me know (probably 1995 users would help most) if they have 2 or 4 I would appreciate it, thanks.
 
#6
HGFireHazard said:
Alright. I have my dyno date set up for the 24th of this month, and they told me that I should change my o2s. I told them my car has only 52k on the clock but they said to change them anyways. They said that if my readings don't match close to what their wideband is putting out they will change them for me and charge me labor.
Click to expand...

I've never seen anything like that or heard any other members say anything like that when they went to the dyno :shrug:

Most dyno shops use a sniffer type wb they clip in place in the tail pipe. It is worth mentioning that sniffer wb can show a different reading from one that would be mounted in a bung up by the narrow band O2's.

This sounds like something you might want to get a better understanding about before any money changes hands :shrug:

Grady
 
#7
Cool, thanks Ben. Maybe that's one of the reasons why my mileage is so horrible. Car has around 185K already and they've never been changed. :eek:


So is there a particular brand to look for .... like Bosch? Which ones did you get Ben?
 
#9
The other interestin thing is are you just doing a couple WOT pulls or are they tuning your car for drivability. If its just a couple pulls you car doesnt use its 02 sensors at WOT, so what they are reading would not make a difference. If you are getting it driveability tuned then might as well.
 
#10
The dyno shop is welding a bung in my exhaust and using a wb there. The car is running pretty rough, so it isn't just going to be a few WOT runs. I've had it out on the road once, and when I tried to go WOT it acted like nothing was going on. It isn't running now because the plugs are fouled so I have to change those Thursday. They told me that I only needed to replace the upstream ones, but since the only 2 I have are down right by my collectors, I don't see a problem. I will call the dyno place and let them know tomorrow that my car only has 2 and that they are down pipe to see what they say. Thanks a lot for all the input guys.
 
#11
yes, ford is not the only one who thinks are cars have 4 o2 sensors. but come to think of it, its probably not autozone and advance auto's fault that their computers are wrong. They get all those specs from ford, who obviously needs to get there **** together. the v6 94-95 mustangs had 4 sensors because they were obd2 cars early before the required 96 change, but obviously we have obd1 cars and they only have 2 sensors before the cats. it really is annoying, youd think after all the people who have bitched, that they would get it together and change the computer. but yeeah, bosch o2's are what i use, work nice, look alot better than ford ones, like theres more to them or something. but if you want a decent price on ford originals buy them from www.mustangsunlimited.com otherwise, i would highly recommend bosch from any parts store. bosch is the one making all of the fancy high price wideband o2 sensors so they know their stuff.
 
#12
I will take the advice on the bosch o2 sensors, but I don't want to go to the auto store and deal with the same 4 sensor story. Do any of you happen to know the average price or part number of the sensors? On Autozones web site they have 2, one for $70.99 (part# 13127) and another for $54.99 (part# 15718). Grady, do you have any further input about the wideband being used in a bung? They told me they would weld in a bung and that it isn't a sniffer type. Like I said I'll call them tomorrow but I would like your input anyways. The last thing I want is them popping in $120 a piece o2s because they think they need to.
 
#13
I do understand where they are coming from though. Nothing worse than trying to tune a car for driveability when your O2 sensors are bad. Since the eec uses the values it receives to change a/f ratio, the need to be in proper working order.
Scott
 
#14
HGFireHazard said:
I will take the advice on the bosch o2 sensors, but I don't want to go to the auto store and deal with the same 4 sensor story. Do any of you happen to know the average price or part number of the sensors? On Autozones web site they have 2, one for $70.99 (part# 13127) and another for $54.99 (part# 15718). Grady, do you have any further input about the wideband being used in a bung? They told me they would weld in a bung and that it isn't a sniffer type. Like I said I'll call them tomorrow but I would like your input anyways. The last thing I want is them popping in $120 a piece o2s because they think they need to.
Click to expand...

From everything I've seen, the bung mounted method is more accurate.

I've seen this 2 or 4 O2 sensors Q come around on this forum many times before and I remember part numbers have been given along with other details which could help if you search this 94-95 fourm.

I don't think you need new O2's myself :nono:

but

if you choose to replace them, there is nothing to it ;)

I'd never pay that kind of price for something that is so easy to do.

Good luck, which ever way you go :)

Grady
 
#15
HGFireHazard said:
I will take the advice on the bosch o2 sensors, but I don't want to go to the auto store and deal with the same 4 sensor story. Do any of you happen to know the average price or part number of the sensors? On Autozones web site they have 2, one for $70.99 (part# 13127) and another for $54.99 (part# 15718). Grady, do you have any further input about the wideband being used in a bung? They told me they would weld in a bung and that it isn't a sniffer type. Like I said I'll call them tomorrow but I would like your input anyways. The last thing I want is them popping in $120 a piece o2s because they think they need to.
Click to expand...
You need the p/n 13127 ones. they are 69.88 at advance auto parts or you can buy them from www.partsamerica.com for the same price. The Bosch ones are the way to go IMO, but if you want the ford motorcraft originals here is a link: http://www.mustangsunlimited.com/itemdy00.asp?T1=DY703+01 They are only 59.95 a piece here. great deal as opposed to buying the exact same thing at the dealership. Hope this helps
 
#16
The Ford sensors usually ARE better, mainly because, even though they are probably manufactured by Bosch, their heater circuits seem to be a lot better than the normal aftermarket ones. Most of the time you CAN get by OK with Bosch 02 sensors - I do. But in some cases, usually with LT headers the Ford sensors seem to do the trick when Bosch ones don't. I'd suggest getting Ford 02 sensors form an online Ford discounter if aftermarket ones cause driveability issues.

We NEVER use tailpipe sniffers when we tune - I just plain do not like them. There are several problems with them, there is always some atmospheric dilution that gets in and messes the AFR at idle. At WOT there is a delay, and it can be as long as 0.5 seconds - the delay is what you are reading at the wideband and what is happening at the motor. A 0.5 second delay on a blower/turbo car is HUGE, considering how short the runs are. And finally, when you check AFR after the cats, the cats actually 'leak' a little 02, that will slightly skew the readings. We require all cars we tune to have a weld-in bung for the wideband. Costs a tiny bit more, but it's really worth the expense.

Don
 
#17
Don 95Vert said:
The Ford sensors usually ARE better, mainly because, even though they are probably manufactured by Bosch, their heater circuits seem to be a lot better than the normal aftermarket ones. Most of the time you CAN get by OK with Bosch 02 sensors - I do. But in some cases, usually with LT headers the Ford sensors seem to do the trick when Bosch ones don't. I'd suggest getting Ford 02 sensors form an online Ford discounter if aftermarket ones cause driveability issues.

We NEVER use tailpipe sniffers when we tune - I just plain do not like them. There are several problems with them, there is always some atmospheric dilution that gets in and messes the AFR at idle. At WOT there is a delay, and it can be as long as 0.5 seconds - the delay is what you are reading at the wideband and what is happening at the motor. A 0.5 second delay on a blower/turbo car is HUGE, considering how short the runs are. And finally, when you check AFR after the cats, the cats actually 'leak' a little 02, that will slightly skew the readings. We require all cars we tune to have a weld-in bung for the wideband. Costs a tiny bit more, but it's really worth the expense.

Don
Click to expand...


As always Don, great to get info from true experience :nice:

You said ....................

And finally, when you check AFR after the cats, the cats actually 'leak' a little 02, that will slightly skew the readings.

This means you will read leaner that you should ... Correct :shrug:

Grady
 
#20
mojowrkn said:
check out http://oxygensensors.com. I got mine there several months ago. No hassle and if I remember correctly, free shipping.
Click to expand...


Sup Bobby. I think this is the first time I've seen you post here. Thanks for the link.


They have some good prices there .... but I don't know if those sensors are known to be good brands. They have Walker, Denso, and NTK for our cars. Anyone ever used any of these?
 
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