Project Cars or Member’s Cars sub forum for the build threads so readers can follow the creation or re-creation of a high performance Caddy. Whether it is a CTS-V, a 1970 Eldorado, a Northstar powered Eldo, etc. , an organized way of finding and enjoying and learning from others who have the need to modify their rides for performance or racing.
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You can get some vacuum hose and a "T" fitting and connect to 102 or, if the other ports above it are capped off remove the cap and install the vacuum gauge there.
The gauge will fluctuate like the picture on the bottom row in the middle...
That is a probability, but, due to the fact both of them indicated 0 cross counts, I'm thinking more likely a fuel injector problem or a vacuum leak. It could still be an O2 sensor but don't throw parts at it until you run out of money.
If you have a vacuum gauge, install it and note whether the needle is steady or fluctuates, what is the reading at idle, how does the engine react if you snap the throttle, what is the reading and how does the needle react at a steady 2000 rpm? See the attachment...
Contrary to what you may have heard.....there is no Federal law regarding how long parts must be made available. That said...GM does try to keep parts available for 7-10 years. They do better at it vs. some of the newer auto makers. You should have no worries about parts being available.
GM really does not make parts like they use to 50 years ago. They seem more interested in building the powertrain and the body-in-white.
Many parts are made by outside suppliers and are shipped to the line just-in-time. Even body color trim comes into the plant already painted and ready to install for example.
Headlights, grilles, seats, wire harness, carpet, radios, clusters, glass, sunroofs etc all get shipped in ready to bolt to the car.
Some operations....like doors and wheels and tires are sometimes built by outside suppliers right inside the plant.
great information all around!
i'm certainly learning something beyond what I got just from flipping through the service manual.
So to answer the previous question, the PCM is showing 'Closed Loop' running and the Auto icon is lit up.
Assuming that the "Likely causes of an E046" is ruled out (which I intend to double check) wouldn't the fault tree still indicate bad or lazy O2 sensors because both the right and left sensors had stretches of zero value cross counts during my test drives?
Hey rockfangd, I'm not sure if I sent a post back to your response to my question or if I actually answered my own question!! Sorry I'm new to all this forum stuff but I really like this site. An thanks for the Welcome, I appreciate it. Hopefully I'll get the hang of it.