rinn240z

Thanks for the tip! A few of the connectors did have poor or dirty contacts. Also my dimmer switch for the instrument lights will melt it's connection so i bypassed it, is this a decent fix?

Thanks JHM, for the diaghram. This will help since I began with everything laying in the floor.

Hello everyone. I'm new to the Z world and am having trouble finding info on wiring and which relays are which on a 260z. I've researched hours and have a few manuals but nothing specific for the 260z. I've been troubleshooting many electrical issues from charging, turns signals, hazards, gauges, and wipers. So I pulled the harness out and found some melted wires. I want to eliminate all unessesary wiring and relays like the interlock system and anything else. I hope this isn't a redundant question. Just a picture of the relay board would be helpful. Thanks

sorry, for the bad info. I'm dyslexic! regardless, i think you should check the valvetrain.

I just had a similar sound in my 240. I dropped a valve due to bad machine work, they had ground the tips of the valves causing interference between the lash pads and retainers and the locks fell out. Anyway, my suggestion is to pull the valve cover and inspect it before you cause more damage. Remember the cam is spinning twice the speed of the crank which would explain the "fast" knock. Hope this helps

have you tried cleaning the throttle blade? this may also help with the cold start issue