Car is hard to start

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
User avatar
evildky
Posts: 14225
Joined: Sat Jan 31, 2004 9:23 pm
Car: 71 Datsun 240ZT
87 Nissan 300ZX N/A-T
06 Nissan 350Z GT
Toyota Tundra TRD RW
Location: Louisville, KY
Contact:

Post

well lets start by trying to fix the idle, it should have a good smooth idle, if it's "bumpy" then there is a problem
and yiou are sure when unplugging the cop's that the "bumpiness" was effected by every single cop you unplugged?
vac leaks and idle air issues wiould be the second thing I'd look at

if you haven't already got hte fsm get it, bigtdogg just posted a link to a free pdf dl, get it


LIBRILZ
Posts: 1491
Joined: Sun Mar 04, 2007 3:17 pm
Car: 1990 Nissan 300zx
2007 M45 Sport

Post

It only Idles bumpy when cold, once warmed up it doesn;t idle bumpy like that or anything, but it doesn't feel as smooth as it should at idle, theres some vibration i can feel. So then if I was to turn A/C on the idles drops by like 300 rpm and the car idles at about the last notch before 0rpm. I know the idle is supposed to be raised when the A/C is turned on but it only gets raised when turned off, raised when the load is taken off.

I do have the old style Fuel pressure damper, and regulators. They are both black. I also do not get the 02 sensor code anymore. It's weird how the car is driveable after unplugging any of the two 02 sensors.

Before my car had a rebuild everything was fine, except the a/c idle thing but that was nothing. Now after the rebuild I get crazy hesistation. I don't understand it, and only thing that has changed is new passenger side 02, new engine harness, had to wire in the ptu to the new harness, and I did AIV, EGR, and water line bypass. :werd:


Return to “300ZX (Z32) Technical”