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Old 07-30-2020, 05:14 PM   #11
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The O2 sensor is not like other sensors that you only replace if it fails, for the cheap cost of replacing it I would recommend replacing it. The Denso sensor is a good part. I used to use the Bosch one without the female connector and just splice it into the old wire, but I do not see that one listed for your truck.
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Old 07-30-2020, 07:09 PM   #12
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I replaced my factory O2 sensor after 31 years. Never could find any difference or improvement.

OP, factory intake is cold air.

Filter material I was referring to:

1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
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Old 07-30-2020, 11:28 PM   #13
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Originally Posted by Arv View Post
With the electronics managing the timing these days, given that the timing has not been touched, what is the limit that the ECU can't adjust it properly? I never really knew the answer to this. Can't imagine it being that far off and my chain skipping a tooth. I would check it but I'd have to buy a timing light so I just wanted to make sure I need to. Thanks.
Timing lights are only about $40. You may be able to borrow one, it only takes a minute to check it.
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