Oldblue

Fingers crossed!

RJ_RS_SS_350

Mine takes 5.5 minutes to get to 150* from a cold start (overnight), idling in neutral.

My mechanic said that is too long, and I needed a new thermostat. I put in the new 131-158 ACDelco, and it still takes 5.5 minutes.

How long should it take, what time is everyone seeing with your HHR?

Wondering if I have another bad thermostat out of the box?

donbrew

I presume you meant 180F.
If you don't get P0128 don't worry. It is the ECM that needs to be pleased not the mechanic.

RJ_RS_SS_350

149* is a milestone in the drive cycle, so I'm guessing that's why it concerns him. It calls for letting the engine idle for 2 minutes and 149*.

Oldblue

My new thermostat just installed last week takes 5 to 6 minutes to reach 150 degrees F no more P0128

Lonwane

I start my car in the morning and by the time I get to the freeway it's at leat 180.
Ready to drive at increased speed.
The temp doesn't stop at 149.

donbrew

Are you still trying to accomplish the elusive "Drive Cycle"? Don't bother.

RJ_RS_SS_350

I asked the question before today's drive cycle, a trip to the next town. Then I went home.

This afternoon, we had to go to the grocery store. Before we left, I figured I'd waste my time, and check the I/M status. I was blown away, everything was ready!! I went straight to the mechanic for the smog check. I now am the proud owner of a smog certificate!!

firemangeorge

Congrats on passing your test RJ...

Oldblue

Awesome! Passed!! Now go out for ice cream to celebrate!!! Thanks for the follow up!