Power issues, misfires, lumpy running?

 

Many of the running issues are simply sensor faults, connection issues and poor set up, or a combination of all three. Now most of these have been dealt with many times here but a little known issue that is increasing with time is with relays in the fuse box that can potentially upset the clear and concise running of your zed and be the cause of all manner of issues.

 

Check out the circuit diagram above which among other things shows the fuel pump relay and the equally crucial coil pack power relay, for the purpose of this illustration the coil pack relay will be focused on but to a slightly lesser degree the fuel relay and eccs relay has the same potential issues.

Should say it was originally posted by Jeff TT, but i cant see the specifics of the modifications he refers to in the body of his original post

Think he's still working on it I don't believe he published the results yet

Was it this thread :

 

http://www.300zx.co.uk/forums/showthread.php?126752-Power-issues-misfires-lumpy-running-power-modification&highlight=running+issues+simply+sensor+faults

yep , thanks, seems like we need Jeff TT to give us the specific details !