02 sensor replacement- 97 exp

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Nov 8, 2008 | 05:56 PM

87wreckerman

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02 sensor replacement- 97 exp

just picked up a 97 exp, w/ the 4.6, it has a CEL on and the previous owner had the codes scanned and i think it was just 1 o2 sensor in the downstream i think that was bad he said, truck runs fine but he gave me 3 new bosch o2's with it, 2 are part # 15717 & 1 is # 15716 , how many 02's are on the 4.6 total?? i have the special socket also , just wandering how to tell the diff on the part#'s , since 2 are the same want to put the rite 02's in the rite place

Nov 8, 2008 | 10:43 PM

alloro

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15716 is the upstream one (before the cat.) 15717 is the downstream one (after the cat.) The truck has 2 of each.

Nov 9, 2008 | 06:12 AM

87wreckerman

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ok thanks, the upstream are the ones that would effect the MPG and all rite?

Nov 9, 2008 | 06:16 AM

projectSHO89

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From: St Louis

Quote:

Originally Posted by 87wreckerman

ok thanks, the upstream are the ones that would effect the MPG and all rite?

Yes.

However, You're probably wasting perfectly good O2 sensors.

There are no conceivable faults that require replacement of all four O2 sensors. Complete waste of money.

I'd suggest getting the fault codes read and starting over before picking up a wrench.

Steve

Nov 9, 2008 | 06:19 AM

87wreckerman

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rite, he said only 1 was bad from the code he got, but since he gave me 3 i figured mite as well change them while im under there unless there a PITA to change all of them . ill prolly run it up to autozone and have the code read again so i know exactly which one is coming up bad

Nov 9, 2008 | 10:14 AM

alloro

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3 are easy to change. The upstream passenger side will give you nightmares for several days.

Nov 9, 2008 | 11:16 AM

87wreckerman

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well its the upstream driver and down stream pass, so far the drivers side is a PITA, any tips on removing this thing?? ive removed the exhaust heat shield and i have the special socket but not much luck on cracking it loose, even sprayed it down with wd40