Otto Mattik
board member
- Joined
- Dec 24, 2015
- Location
- Upper Midwest more or less
Yes, I?m aware. I checked the diagrams after checking it.
curious to see how it develops, good luck
Hello Guest, welcome to the initial stages of our new platform!
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Yes, I?m aware. I checked the diagrams after checking it.
Check your wiring between the LH and the O2 also, while you're at it.
On the off chance I'm being dumb, use the obd to cycle the injectors and give a listen w the screwdriver at the base of each one.
Marty
No surprise, the new O2 sensor didn't fix it. Great!
I tried unplugging the large vacuum hose that goes to the climate control (just to make sure there aren't any leaks in that area) and after capping it off, it started kinda hard and the CEL came on for a few seconds. Weird. Anyway, I'm not sure what to do next... this car has really been testing my abilities. I've never had such a hard time diagnosing a seemingly simple problem.
I'm about to pull the cam cover now and swap out the valve shim on the cylinder 1 exhaust valve. That should loosen up the clearance to match up with the rest of them. I should have done that before, but oh well... at least it's easy to access.
Have you done a voltage test of new o2 at normal operating temperature(do not waste time checking cold) ? It's important to verify which systems are working properly.
If, after warm up, the O2 sensor is not swinging something upstream has failed. The engine is running RICH. Now, what would cause that?
Not that I can see. I’ll check it out and see if I can find any leaks, but I don’t hear any.
Now, it’s worth mentioning that for some reason, someone welded an additional O2 sensor bung on the top of my downpipe. No idea why it’s there, all I could think is that it was a wide band sensor for an AFR gauge, but I’m not totally sure.
I assume you know you can do a signal wire o2 voltage test at the connection under the hood ? I would try it there also, since the readings are not in the correct range.