Need some help...
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Freshman User
Joined: Nov 2008
Posts: 29
Likes: 0
From: Eau Claire,WI
Need some help...
Does a 1990 f-150 4.9 have a oxygen sensor? I see it listed under websites.
I have a threaded hole inbetween the 2 pipes just before the 1st cat. It looks like a oxygen sensor that goes there.
Any ideas where they place the sensor if it has one?
I have a threaded hole inbetween the 2 pipes just before the 1st cat. It looks like a oxygen sensor that goes there.
Any ideas where they place the sensor if it has one?
Elder User
Joined: Jul 2004
Posts: 911
Likes: 2
From: Northern Virginia, USA
Efi 300/4.9 motor through 1995 has one oxygen sensor in the downpipe prior to the convertors. Sounds like yours is missing. $40-60 at your local auto parts retailer. There will be an electrical plug nearby to connect it.
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Freshman User
Joined: Nov 2008
Posts: 29
Likes: 0
From: Eau Claire,WI
Thanks. So I checked everywhere for the connector and cannot find it at all. Check under the vehicle everywhere and behind the motor but no avail.
When does the wires foe the sensor go to? I have a few connectors that are not connected but they are no where near the exhaust
When does the wires foe the sensor go to? I have a few connectors that are not connected but they are no where near the exhaust
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