1 Hertz variation in power while flooring it

Sorry I don't have any insight into the 1Hz fluctuations, but when you mentioned needing to floor it because of an opening bridge I couldn't help but be reminded of this classic moment.

 

EGR valve problem? Are you at about 70/80k miles (120k km)? Did your sudden surge free some carbon deposit that has now found it's way somewhere it shouldn't?

I'm only guessing, but maybe try some fuel system cleaner. Or take it to the dealers if you can afford

 

try avis?

 

I dont know about your Prius, but what an exhilarating story! I could picture the whole scenario in my head just by reading that.

I pictured this:

 

And when I think of the Dukes of Hazard I think of her, I mean this;

 

R-P, can you please confirm or deny that during your tactical Prius maneuver, that a.) your Prius looked like the Dodge flying over the "bridge out" and or b.) that when you arrived at your daughters school, the scene looked exactly like the picture that GrumpyCabbie posted??

Ok sorry for hijacking, I just wanted to create a few "hump-day" smiles and laughs.

 

Seems like we think alike PriusGuy. Though I was thinking more like this.

 

When my Android phone responds to my key-presses with a 1 Hz lag, I know it's time to free-up more memory by moving some apps to the storage card.

 

Thats so awesome. I might steal it for my sig line! haha!

 

If you were in the first minute of driving and you floored it, there would be a short lag (of less than a second) and then a surge of power, if, when you floored it, you were still in stage 1 of warmup. When you floored it, you would have forced the warm up cycle into stage 2 and there is a brief lag followed by a surge at this point as the computer reconfigures itself to respond to the request for power. I haven't had a lot of experience myself as I normally would not be in the "Scotty, give me all she's got" situation so soon after start-up. I don't identify with sinusoidal characteristic you describe.

I don't know if that is of any help.