o2's on a 93 gt ???

S

southernstang97

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Dec 28, 2005

#1

• Dec 28, 2005

• #1

I got a good one for u guys ,,, do the o2's on a 87 to 93 reading like the 4.6 o2's. What I am meaning is do they take readings the whole time or just at start up.... please let me know how these things work on this 5.0

thanks

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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#2

• Dec 28, 2005

• #2

To my understanding, the O2's on an OBD-I 5.0L stang do read at all times. However, their info is not used by the computer to trim fuel until they light off. And being HEGO's, they take 30-120 seconds to light off from a cold start up.

On fox III's, the O2's are ignored at WOT, whereas on 5.0L Fox IV's, their input is utilized at WOT.

We dont have the secondary O2's (number 3 and 4) to monitor the efficiency of the emissions components, like the OBD-II mod-motor cars have.

And all O2's are used once the car is warmed up - some just dont use the info at start up. Your phrasing has that backwards.

Good luck.

 

S

southernstang97

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#3

• Dec 28, 2005

• #3

i am asking because my car has a s/c on it and it was tuned with out the o2's hooked up , we al thougt that they where hooked up but come to find out they where not , the tuner is telling me it is up to me if I want to get the car retuned with them hooked up but will cost me a retune fee ,,, but he said the car was tuned with them off and that the 5.0 do not need them ,,, i am not sure what I should do ????

 

Mustang5L5

That is…until I whipped out my Bissell

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#4

• Dec 28, 2005

• #4

What he said X2

 

Michael Yount

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Apr 10, 2002

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#5

• Dec 28, 2005

• #5

....see the thread at corral.....

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

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#6

• Dec 28, 2005

• #6

Linky to corral??


I'd like to edumacate myself on this as well!

 

Michael Yount

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#7

• Dec 28, 2005

• #7

http://www.corral.net/forums/showthread.php?t=741094

 

85mcLaren

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Dec 28, 2005

#8

• Dec 28, 2005

• #8

Hissin,
I was under the impression that even on the EECIV 5.0's - the O2's are NOT used on WOT. Am I wrong on this ?

Jason

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

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#9

• Dec 28, 2005

• #9

85mcLaren said:

Hissin,
I was under the impression that even on the EECIV 5.0's - the O2's are NOT used on WOT. Am I wrong on this ?

Jason

Click to expand...

Um, foxes are 5.0L EEC-IV - I think you are talking about 94-95's (fox IV's). From what I gather (my interpretation of Mr. Wesley's articles, lookin at lambda readings during datalogging [and seeing the values walk] and reading posts, that is my take). I am pretty sure of it, but you could read the articles or just ask Grady (the 5.0L SN95 TwEECer guru IMHO).

 

Black1987Stang

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#10

• Dec 29, 2005

• #10

If he tuned the car dont they look at the air/fuel ratio so they know how to modify the tune? If the 02s werent hooked up I dont see how the tuner could tune it properly?...

 

Michael Yount

Mustang Master

Apr 10, 2002

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Dec 29, 2005

#11

• Dec 29, 2005

• #11

"...dont they look at the air/fuel ratio..."

Not his year car at wide open throttle....

 

Black1987Stang

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#12

• Dec 29, 2005

• #12

Michael Yount said:

"...dont they look at the air/fuel ratio..."

Not his year car at wide open throttle....

Click to expand...

O ok