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Revving at 40 mph and rough idle

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Old 08-27-2022, 09:44 AM
  #11  
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You said EVERY car you had driven with OD. Not most or some, but EVERY. If I said that, it would be a large group and it sounds like it would be for you too. I have owned alot of cars too that have OD.

This HHR is the ONLY car I have driven that does this. Maybe all HHRs do it, Idon't know. But it just doesn't seem right to me.
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Old 08-27-2022, 09:55 AM
  #12  
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Wrong post for this but give this one time and it'll fit.
These posts get so side tracked it's amazing. The OP has not responded since the first post and I think we changed subjects at least twice.
Oh well, life goes on.
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Old 08-27-2022, 12:43 PM
  #13  
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Originally Posted by donbrew
"Operating temperature" is when the O2 sensors are ready, not when the coolant reaches a certain temperature. Usually very near the same, especially when you know that the important temp in HHR is 158F not 180F.
What part of "that I have driven with OD" is not clear? That is pretty narrow definition. I did not say "All cars with a transmission". My Mazda does it, several Toyotas I have driven do it. a Nissan did it and both HHRs I have owned did it. It is because there is a clutch in the torque converter involved.
When I was thrashing on a P0172, the Torque app showed my 2011 2.2 going to closed loop very quickly, not much over 100F coolant temp the way I remember it, just couple of minutes, barely out of the parking lot.

https://www.chevyhhr.net/forums/prob...15/#post858972


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Old 08-27-2022, 12:48 PM
  #14  
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Originally Posted by greg8453
These posts get so side tracked it's amazing.
​​​​​​​Discussions have a way of doing that. An imperfect way of learning a few things.
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Old 08-27-2022, 08:37 PM
  #15  
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Originally Posted by KArthur
You said EVERY car you had driven with OD. Not most or some, but EVERY. If I said that, it would be a large group and it sounds like it would be for you too. I have owned alot of cars too that have OD.

This HHR is the ONLY car I have driven that does this. Maybe all HHRs do it, Idon't know. But it just doesn't seem right to me.
Is it obvious that I have not driven every car in the world? Should be. I never indicated that I have driven lots of cars with OD, probably less than 10. I have drive at least 100,000 miles a year for many years, but only a few cars with automatic trans.
I guess a few truck with 5 speeds might qualify as OD, but they didn't have torque converters.
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