Our Community is 940,000 Strong. Join Us.

85 300zx turbo starting/warm up problem

11-14-2009, 04:15 AM

This problem has been ongoing for a long time and I can't figure it out. When I start the car it's fine but after about a minute the idle drops very low, almost to the point of dying and starts running really rich. If I hit the accelerator to get the rpms up, it bogs and stutters. But then, as soon as it reaches operating temp, all that stops and it runs fine. I have replaced the cold start sensor and the crank position sensor (http://www.2carpros.com/forum/1985-nissan-300zx--starting/warm-up-problem-vt371400.html#). I also ran the diags on the computer and came up with nothing. Any ideas? Your help would be much appreciated!

11-24-2009, 05:37 PM
Did you ever figure this out?
Throttle position sensor maybe?
Interested to here the fix.

12-09-2009, 02:15 PM
I got the same exact problem. If I use the a/c; it will idle higher and keep it running a little better. It is something with the amount of air entering the system. Maybe the air bypass valve or the auxilary air?

Add your comment to this topic!