Knock Sensor Not Reading Correctly

[Supremacy]

Hi there,

I've recently installed a Link G4+ Storm into my 3SGE powered 1993 MR2. I have had it tuned and my tuner has mentioned to me that the factory knock sensor was giving out strange readings compared to his knock sensor.

I've since installed a new 2 wire sensor (instead of a single wire like the factory sensor), but once configured, it only shows a reading on Cylinder 1 as opposed to readings for 4 cylinders. I have followed setup procedure I found here in the forums but cannot get it to read all 4 cylinders.

Is my sensor faulty or could it be configuration?

 

Regards,

James

[Davidv]

The knock sensor puts out a knock signal all of the time, so if it's only showing for 1 cylinder then it'll be something in your config.

If you post up your tune file here someone will steer you in the right direction.

 

[Scott]

Hi James,

David is right, it is most likely due to a setting in the base-map. Try checking Knock Control > Cyl Setup.

If you are still running distributed ignition then you will want all the Cyl X allocations to be on Cyl 1 ITrim Table, as the ECU only has the ignition 1 output to control.

Scott

[Supremacy]

Hi Scott, 

That'll be the  problem. I believe they are all set individually. 

I'm still running factory distribution ignition. 

I'll make the changes and see how I go over the weekend. 

 

Thanks, 

James 

[Supremacy]

Hi Scott,

Adjusted my trim tables as suggested. Still no luck. Should I only be seeing Cyl1 since I only use a single ignition out on distributor or should all 4 be shown?

Attached images show my knock setup.

 

Regards,

James

[Scott]

You will only be seeing a reading for cylinder 1 with a distributor ignition setup.

Scott

[Supremacy]

Thanks Scott for the help. I understand now. 

[esso]

your gain channel is really high 100 is like you are turning the volume really high , try to lower this value 

[Supremacy]

Thanks. I realise it is quite high. Haven't had the time to get out and tweak on the car yet. I was more concerned about the lack of readings on cyl 2 to 4.