I've started getting a rattle at WOT, i've checked the timing and it hasn't moved, I swapped my CO Pot for my spare and all it did was make the idle smoother (set at 550 ohms), checked the plugs and they're a little black but not oily. Just wondering what I should be looking for? Knock sensor? Can it be tested?
I've just been driving it really gently and avoiding WOT for now.
Things i've done so far:
- Taken the plugs out to check the colour
- Checked the pins on the ECU plug from the throttle body for Idle and WOT switches
- Checked in the top boost pipe is all clear
- Tested for boost leaks by using BRV for a few seconds
- Battery is good and voltage is good when running
My spec is:
- 1308cc with wossners
- standard charger on german toothies (65mm) with chip to suit from PPP, cone filter
- PPP full exhaust
- BRV mod (using short spray of the wurth grease from here every 1500miles roughly)
Is it possible its the lambda? Or more likely a fuelling issue? I'm not really sure what to look for next