Just replaced the knock sensor and need the exact torque setting. I've so far torqued it up to 15nm as per previous advice but now I get a CEL error for the knock sensor straight away where as before it was intermittent.

I've seen threads that say this setting has to be exact

 

Anyone please?

Also I've now removed the new sensor and measured resistance between the connector and sensor body and it's reading infinite. Is this at all correct?

The old 'defective' one reads roughly 560 k ohms.

Have I simply got a duff new sensor?

 

I think I answered this on one of your other threads. My PDF manual shows it as 24Nm

 

Thanks Silent.

I tried it at the setting you gave me still no difference.

The new sensor has made things worse. This all started because the CEL came on for a moment, did the code check found the 22 code, got a new one. Then after an ECU reset the CEL is on all the time same code. So it's worse.

I've checked resistances and the old 'duffer' gives 560k ohms the new one infinite.

Have I got a duff new sensor? Going on holiday tomorrow in the scoob, if I put the old one back in and take it steady will it do any harm other than hurt my performance due to ignition retardation? I'm not to bothered about a loss of performance for the holiday but don't want a knackered engine after.

mtia

 

Don't forget that the code refers to knock sensor OR CIRCUIT. It may be a problem with the wiring or the connector itself. Check that the pins on the two halves of the connector are not corroded and that they actually contact each other correctly when the two halves are joined.

If at all possible check the wiring colour code at the knock sensor and trace it back to the engine loom multi plug by the battery and also check the connector pins etc there too.

Good Luck David APi

 

Thanks David,

Fair point about the entire circuit it needs to be checked. I won't have time tomorrow as I've just got to chuck the scoob back together fill it with holiday stuff and get going or the doris will string me up. As needs must I just want to make sure that it's going to be ok now for steady driving. It's not been detting (that i can hear) at all and is full of decent SUP so I reckon it will be ok until I can get back.

So I guess until I can get to the bottom of this I'm looking for some advice about driving the scoob in this state. No obvious signs of det - no pingking at all, never have. As I understand it the ECU will just retard the timing as far as poss in this state and I'll loose performance and fuel economy but no serious damage? Don't worry if it does go pop I won't hold any one responsible just want a bit of reassurance.

 

Not sure about th ecu retarding the ign. I'd expect the knock sensor would have to tell it to do that. Maybe an ECu Guru can confirm.

For safety, try disconnecting the waste gate so that it cannot create boost. Then I personally would be a bit happier with your plan.

David APi