I notice whenever my Civic 2010 is going down hill and the brake is applied, the RPM always goes up to between 3000-4000 and the speedometer shows 40mph. How could this happen?

I thought if I am going up hill and step on the gas peddle, the RPM will always tend to go up.

Any suggestions.

Thanks for your response.

 

that's b/c it is downshifting hence higher rpm; you have an auto transmission right?

 

You are correct.

So the downshifting causes the RPM to blow through the roof. Is there any ways to avoid this from happening.

I guess this high RPM could be damaging to the engine. Am I correct?

 

well, 3-4k is not a damaging rpm (i.e. it is not blowing through the roof) though I'd say you ought to bring it by the dealer and let them know. it still sounds higher than it should be.

When I shift, I normal shift at 3 k to the next higher gear using a manual trans. If you look at the tachometer, you'll see the red line begin around 5k or 5.5k

 

IMO it sounds like its using engine braking to help slow it down. instead of only using the brakes.

 

I think so. Even if I apply the brake, the RPM seems a bit high. I have a stick shift Accord and the RPM normally will be under 2000 RPM going downhill. I was surprise the Civic automatic uses the engine to slow down the car.

Even 4000 RPM is not at the warning limit but I still consider this to be a little bit odd the car will apply the 'brake' itself even though the brake paddle is applied.

Is this by design? or there is something wrong with the car?