Hi folks, I'm over in the UK and my partner's Honda Jazz has developed a pretty scary fault that we are struggling to fix

Usually at higher speeds, the rev counter shoots up as though she is accelerating hard when she is not. Then the car shakes and jolts and shudders and the the engine often cuts out, meaning we have to quickly coast over to a safe spot and turn the engine off and on again.

It's pretty dangerous :/

A mechanic diagnosed that it needed a new crankshaft sensor but on replacing it today, the fault code is still there and the symptoms haven't gone away.

Can anyone help please?

Dan

 

That's really dangerous, don't drive the car is my advice. It might accelerate into a wall even worse, a person.

Sounds like an ECU going wonky, not that it happens but that's the only thing I could make out of it. I don't even know what happens when an ECU goes wonky. That's just a theory.

I'd go to a Honda dealer and complain, that's something they should seriously diagnose.

 

Is the car actually accelerating or is it just the RPMs rising without any more power?

 

Hi! You need to talk to your mechanic friend about getting a scan tool with the ability to log data connected to the car. Without collecting information you're just going to spend money replacing parts. Pay the $90 or so to get it diagnosed, this is almost certainly "that kind" of problem, and will be tough to repair otherwise.

 

sounds like a CVT transmission to me. Have you changed the fluid at all recently?