what would cause a delay in heating on the driver o2?
Thread Starter
Joined: Mar 2003
Posts: 8,319
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From: North Carolina
what would cause a delay in heating on the driver o2? i did have an a/f gauge hooked up and took it off for an oil temp gauge. all the wires are put back together but on start up it seems the heater in the driver side is not working too well. it was the same with the old o2s and the new ones. i have 2 spots where the purple wire was cut but i think that is just the signal wire so i dont see why its taking longer to heat? these are the new vette rear denso o2s
You're right about the purple wire being one of the signal wires back to the pcm. As far as what could cause the delay...do your best to double check the power supply and ground wires. Make sure they have a good, clean connection. Check the connector itself and see if it needs to be cleaned out. Short of going back to an ACDelco O2 to see if the problem persists, I don't know what else to tell you.
Thread Starter
Joined: Mar 2003
Posts: 8,319
Likes: 1
From: North Carolina
i had ac delco before i went to these with the same issues. cold start the driver side is 5% leaner than passenger but when its all hot they are the same
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I think it wire C & D (per the O2 sensor plug). I can't confirm the color though.
It could be just the difference in manufacturing tollerances and coincidence (sp?). Have you swaped B1 to B2 to see if the problem follows?
It could be just the difference in manufacturing tollerances and coincidence (sp?). Have you swaped B1 to B2 to see if the problem follows?
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Originally Posted by TAQuickness
Just confirmed - wire C is your heater switched 12vdc (will show ground when the car is off) and D is the heater ground.
your diagram might be more accurate. However, I did use "C" (from B2S2) to power my WB. Might be different on the S1's or from F to Y bods. It's easy to check though. With the key off, both C & D will appear as ground. Turn the key to run and one of them will show 12vdc.
Swaping them would identify if it's specific to the o2 sensor. While you are swapping them, you can easly hook the meter up to check the voltages. Let us know what you find
Swaping them would identify if it's specific to the o2 sensor. While you are swapping them, you can easly hook the meter up to check the voltages. Let us know what you find