Car is not running right. Rough idle and misfiring under acceleration.

fryzia23

Sounds like you have vacuum leak. Wouldn’t be surprised if you had a loose clamp on one of the throttle bodies

Quicksilvers

I had this almost same problem with one of my last Z’s. The culprit could be faulty ignition coils and/or a possible vacuum leak. I would test your ignition coils and check for any vacuum leaks. Also replacing spark plugs in your Z by time or current mileage is a better rule of thumb never wait 100K miles to change your spark plugs as Nissan would recommend. If you have to change your coils you mite as well replace your spark plugs since you will be in there anyway. Best of luck with your diagnosis.

Wilson2608

Update: cleaned the throttle bodies they were disgusting I was hoping that it would be the problem but no luck it’s still doing the same thing. Going to test the ignition coils tomorrow. I searched high and low for a vacuum leaks but was unable to find anything.

If anyone else has some ideas let me know please. I doubt it’s the fuel pump but I’m going to check that tomorrow too.

__________________
Stillen G3, z1 Intake Manifold, Stillen Headers, Z1 HFC's, Stillen Catback. 330whp 267 ft- lbs tuned at Z1 motorsports.