Jamie Graham1436215400

Update: The only solution to the issue of the G4 'tuning' itself into an engine that hasn't started was to supply a 12V feed from the battery. This is a bonus because the G4 is now on a switch so I can turn it off and don't have the thing flashing red in my face every 5 seconds whilst idling at the lights! However this hasn't fixed the issue of false knock warnings whilst idling and at any other throttle position. The G4 does appear to detect knock but gives a warning at such low levels of knock (normal in a tuned turbo engine) that it is basically useless. I have been trying to earth the shielded cable from the knock sensor only to find that it is not shielded (normal practise?) so the knock sensor wiring kit supplied from the Link distributor appears to be unfit for the job. Should I have been supplied with a shielded cable kit for the knock sensor? If so what are you and your distributor going to do about it?

Thanks for the reply Simon I understand what you are saying. I have ensured a good earth and moved the +12V from the original feed to another used for my wide band AFR. The shielded cable has been run all the way to under the steering column where it connects with the knocklink. Is the shield supposed to be grounded? If so where? The cabling doesn't run past any high current wiring, the loom for the coil packs or ECU, the fuel pump is fed direct from the battery via relay, no electric fans at start up. As for being too sensitive this is my second knocklink unit! I've spent a lot of time and money on this device and I need it to work as advertised please!Â

Hello I purchased a Knocklink G4 recently with the additional Bosch sensor for my 1997 Nissan Skyline ECR33 (RB25DET unopened with bolt-on mods only). It was installed by an experienced mechanic/tuner who ran it up on the dyno to see how it performed against his professional equipment and the Apexi Power FC and factory knock sensors. Whilst on the dyno it was noted that the Knocklink flashed red when coming off the throttle sometimes. Link support were called and they informed the mechanic that this could be normal, expected behavior so it was left at that. When I picked up the vehicle I only drove maybe a block and stopped at the next set of lights when the knocklink flashed red. It proceeded to do this randomly and repetitively at idle and at various other throttle positions. I called support again and they told me to return the unit via the dealer (Tuspeed). I have returned the original knocklink but the replacement unit is doing the same thing. I have double checked +12V supply and a good earth... What else could be causing this problem? It's obviously not detecting knock. Further to this whilst investigating the wiring etc I noticed what appears to be unusual behavior: If I turn the key on without even turning the engine over the knocklink light does the following: red for a few seconds, then dim blue for a split second before flashing blue and then turning green... it appears to have detected engine start and then tuned itself in to nothing! It doesn't appear to be detecting 'knock' at this stage... There is next to no documentation or configuration. Am I missing something here? Any help would be much appreciated