o2
#1
10-20-2014, 04:01 PM
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o2
I have a 2003 f-150 with the 4.6 v8. It has 262158 miles and I just changed the plugs for the second time. My question is should I change the o2 sensors. They have never been changed. There are no noticeable drivability issues, but I keep reading that they should be changed every 100,000 miles. What is the determining factor?
#2
10-20-2014, 04:11 PM
I have a 2003 f-150 with the 4.6 v8. It has 262158 miles and I just changed the plugs for the second time. My question is should I change the o2 sensors. They have never been changed. There are no noticeable drivability issues, but I keep reading that they should be changed every 100,000 miles. What is the determining factor?
From the first second they are used, they deteriorate. The switchrates become 'lazy', and precise A/F control suffers. Contaminants in the exhaust, the temp swings, all start to impact the active substrate. It's one hell of a harsh environment they live in.
Ford sets the threshold for throwing O2 codes too high - it's to their benefit to do so to dodge Emissions components warranty claims as long as possible ( source: Mike Troyer). The O2's will have long since started affecting driveability and economy.
Change the front two for sure - those are used for A/F control feedback. The rear two monitor the cats for health. At that mileage, I'd just R&R all four.
good luck
Last edited by MGDfan; 10-20-2014 at 04:13 PM.
#3
10-20-2014, 05:55 PM
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^^^ Yes.
From the first second they are used, they deteriorate. The switchrates become 'lazy', and precise A/F control suffers. Contaminants in the exhaust, the temp swings, all start to impact the active substrate. It's one hell of a harsh environment they live in.
Ford sets the threshold for throwing O2 codes too high - it's to their benefit to do so to dodge Emissions components warranty claims as long as possible ( source: Mike Troyer). The O2's will have long since started affecting driveability and economy.
Change the front two for sure - those are used for A/F control feedback. The rear two monitor the cats for health. At that mileage, I'd just R&R all four.
good luck
From the first second they are used, they deteriorate. The switchrates become 'lazy', and precise A/F control suffers. Contaminants in the exhaust, the temp swings, all start to impact the active substrate. It's one hell of a harsh environment they live in.
Ford sets the threshold for throwing O2 codes too high - it's to their benefit to do so to dodge Emissions components warranty claims as long as possible ( source: Mike Troyer). The O2's will have long since started affecting driveability and economy.
Change the front two for sure - those are used for A/F control feedback. The rear two monitor the cats for health. At that mileage, I'd just R&R all four.
good luck
Bob