Questions and Answers

Your Questions About Honda Hrv

August 4, 2013

James asks…

car making noise (exhaust beat) when driving slow (started after 6 mths) it is smooth when it runs?

Honda HRV Car is making noise when starting and whenever car goes slow (looks like exhaust is beating itself). Car has not been started for 6 months and parked on the road.
it looks like car is slipping when accelerating

Administrator answers:

It could be many things from your description, but the first to check is for an engine misfire due to an ignition problem like a bad spark plug wire connection. If you only have 4 cylinders, you’ll notice a cylinder misfire more than on a 6 or 8 cylinder car. That will cause the engine to shake and rattle the exhaust system. Remember, you can’t leave gasoline in your fuel tank indefinitely without running the car more often because gasoline gums up eventually. Try adding a product called “StaBil” to your fuel if you don’t drive the car often.

Helen asks…

Why does my car thump (ie move suddenly in short bursts) when reversing?

otherwise no problems
Honda HRV
only when reversing – normal driving is fine

Administrator answers:

Check engine mounting rubbers.

Reverse gear creates the most torque (twisting force) between the car body and the engine/transmission.

There is a scientific law which says for every action there is an equal and opposite reaction.

When you drive your car the engine/transmission is turning your wheels by applying a turning force which is called torque.

Imagine that the equal and opposite reaction is trying to rotate your engine/transmission around it’s rubber mountings which hold it into the car body.

This reaction squeezes and flexes the rubber mountings. At some point the rubber mountings start to disintegrate (like an old tyre gets cracks in it).

When the rubber mountings are in this state they are no longer holding the engine/transmission as steady in the car as they should be, hence the amount of movement of the engine/transmission on it’s rubber mountings increases.

In this state, when using reverse gear which creates the highest torque, you could experience this thumping in short bursts as the whole engine/transmission twists on its rubber mountings back and forth, with corresponding bursts of increased/decreased rotatation of the driving wheels, and consequential driving speed variations (otherwise known as thumping in short bursts).

Probably not a DIY repair job if the car is modern and you don’t have the right tools.

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