Rattle under load when engine is hot

[Pullstarter]

If the belt is out a couple of teeth I don't think adjusting the timing will be enough adjustment would it?

[jmystaki]

Ok,

Test with VAG-COM with the car really hot and rattling/pinging...

Looks like I did not log the engine timing... must be in bank 4... although it was not clear....

See attached CSV of Bank 1,2,3

I will do some more tests tomorrow and post results.

(VAG-COM awesome ! - I reset my Airbag fault after disconnecting it for stereo installation - and found the my rear right ABS sensor was faulty )
Cheers

[jmystaki]

The engine clean had an improvement in performance... but still rattle/ping under engine load when hot.

Will need to get my laptop data... still need to see which bank the engine timing is under....

Not really clear right now...

[jmystaki]

Does anybody know which Data Group the Knock Sensor is under using the VAG-COM data logger for the engine module?

I have check all 200 groups and cannot see this....

Possibly it is called something else... I was not able to see engine timing either....

Any suggestions?

Cheers

[Mrk_Mickey]

I'd take everything you have to a mechanic on this forum (I don't know where you are located so I can't suggest any) and ask them to scan it either with your unit or their own and retrieve the codes it's giving you, and he'll be able to tell you what it all is.

[jmystaki]

Ok, took the car to Golf Loon.

This is a summary:

1. The car is pinging ( only minor )
2. Disconnected the knock sensor - the engine did not ping...but I think the performance was impacted...
3. Replaced the knock sensor (with a second hand unit) engine continued to ping
4. Vag-Com showed no faults
5. Engine timing checked ok

Suggestions from Golf Loon - purchase a new knock sensor.

[sydVR6]

Ok, took the car to Golf Loon.

This is a summary:

1. The car is pinging ( only minor )
2. Disconnected the knock sensor - the engine did not ping...but I think the performance was impacted...
3. Replaced the knock sensor (with a second hand unit) engine continued to ping
4. Vag-Com showed no faults
5. Engine timing checked ok

Suggestions from Golf Loon - purchase a new knock sensor.

Ok.. what type of fuel are you using? I'm curious to know.

Obviously the idea of the knock sensor is to tell the ECU when to retard the timing (and prevent pinging/detonation, especially when you get a bad load of fuel).
So, pinging is caused by poor fuel or timing advance (ie: knock sensor does not sense the ping and retard the timing as it should).

A serving of 98 octane (if you haven't already) may help you finalise this.

The reason why you felt the performance suffered when you disconnected the knock sensor is because the timing would have been retarded down to the 'limp-home' safe mode.

Interesting that it still pinged even with the second-hand knock sensor you tried.

[jmystaki]

Fuel.... i wish it was that easy...

I have done the last 3,000 km on 98 octane.

I have tried, BP Ultimate, Shell V Power, and currently using Mobil 8000....


Cheers

[Golf Loon]

Yup Timing is correct and its the later kind of 2L with the fixed dissy.

I reckon knock sensor is the GO.

[jmystaki]

Does anybody know the torque setting for the knock sensor?

- 2.0 8v Mk3

I don't have a workshop/service manual... I think it is mentioned in there...

Cheers