Maintenance Items...

[Keepinitoldskool]

I would do a seafoam treatment if you havent done one in a while. Its great for removing carbon buildup which happens alot more to babied engines or ones that dont get ran long enough to reach operating temp. Introduce it to your intake via the brake booster hose.

 

[sgtpoliteness]

I'm sorry, I'm on Tapatalk and can't see anyone's signatures. Is the truck '96 and up? If so it has post cat O2 sensors and will have cat monitoring. You should be able to find the measuring block in a scan tool


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[sgtpoliteness]

Sorry, sent too early. There's a voltage spec for a good, functioning cat.


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[skylark]

I'm sorry, I'm on Tapatalk and can't see anyone's signatures. Is the truck '96 and up? If so it has post cat O2 sensors and will have cat monitoring. You should be able to find the measuring block in a scan tool


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All the post O2 sensors do is verify that the cat is functioning. It won't effect how it runs just whether it sets a check engine light.

 

[sgtpoliteness]

All the post O2 sensors do is verify that the cat is functioning. It won't effect how it runs just whether it sets a check engine light.

That's exactly what I was getting at. People were asking about how the cats are and if maybe the OP should replace them. You can use the rear O2 sensors as a tool to check on cat efficiency.