Engine stumbles at a stop
#11
O2 sensor voltage looks a little funky. Can you graph it?
#13
I'm just a shade tree mechanic too...
O2 stuck out to me but RPM looks a bit low too. I also don't ever remember seeing exactly 0 for throttle position. Might want to graph that too while moving the throttle. Does it show the idle air control?
Edit: according to this I'm wrong on the RPM.
https://www.tahoeyukonforum.com/thre...dle-rpm.29465/
O2 stuck out to me but RPM looks a bit low too. I also don't ever remember seeing exactly 0 for throttle position. Might want to graph that too while moving the throttle. Does it show the idle air control?
Edit: according to this I'm wrong on the RPM.
https://www.tahoeyukonforum.com/thre...dle-rpm.29465/
Last edited by Triaged; August 9th, 2023 at 6:07 PM.
#14
I should add... Your temps look fine.
#16
Bank 2 sensor 1 is what I saw. For driveability just the first sensor matters. The second is for emissions.
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outtactrl (August 9th, 2023)
#17
sensor 1. Both banks
#19
Ya'll got to remember now.I was sitting still on all if these screenshots. That's when I'm having the problem. Sitting at a light or stop sign. Otherwise it will run just fine
#20
I know. You already said that. Maybe the sensor isn't the problem. Maybe the wiring is damaged or there's an exhaust leak. Who knows.
It still would helpful to see the graphs. Something doesn't look right to me.
We are diagnosing here, right? Not firing the parts gun and hoping for the best.
It still would helpful to see the graphs. Something doesn't look right to me.
We are diagnosing here, right? Not firing the parts gun and hoping for the best.
Last edited by mountainmanjoe; August 10th, 2023 at 3:11 PM.
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outtactrl (August 10th, 2023)