Low, shaky idle. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

blitzkrieg59 · 04-25-2004, 10:06 PM

My girlfriends 94 AT Vert is out of the garage and back on the road! She is having a small problem though. The car's idle will sometimes dip down from the standard 900 to 5-400, causing the car to shake quite a bit. I 'm not really sure what could be causing this. Maybe it's not getting enough fuel at idle? Anyhow, I have gone in and cleaned out all the electrical connections with a contact enhancer and the plugs have been recently replaced. I plan on changing the cap and rotor soon as well as running a fuel systems cleaner through the car. Think this should clear it up? Anybody have any ideas as to what else it might be or what I could do?

mutkung · 04-26-2004, 12:08 AM

had the same prob but mine was an intake gasket leak...it was back firing pretty bad too rpm always jump from300-1500.

KOUKI KA-T · 04-26-2004, 09:55 AM

Don't use a fuel system cleaner, the plastic used on Nissan injectors can't handle most of them. Pick up a can of that stuff and read the back label, most say not to be used on nissans. Some people still do but i wouldn't risk it.

blitzkrieg59 · 04-27-2004, 01:35 PM

Alright, no fuel systems cleaner. Good to know. I don't know why it never occured to me to check all the vacuum lines and boots.

04-25-2004, 10:06 PM	#1
blitzkrieg59 Join Date: Sep 2003 Location: Davenport, IA Age: 41 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Low, shaky idle. My girlfriends 94 AT Vert is out of the garage and back on the road! She is having a small problem though. The car's idle will sometimes dip down from the standard 900 to 5-400, causing the car to shake quite a bit. I 'm not really sure what could be causing this. Maybe it's not getting enough fuel at idle? Anyhow, I have gone in and cleaned out all the electrical connections with a contact enhancer and the plugs have been recently replaced. I plan on changing the cap and rotor soon as well as running a fuel systems cleaner through the car. Think this should clear it up? Anybody have any ideas as to what else it might be or what I could do?

04-26-2004, 12:08 AM	#2
mutkung Leaky Injector Join Date: Feb 2003 Location: AL Age: 42 Posts: 136 Trader Rating: (0) Feedback Score: 0 reviews	had the same prob but mine was an intake gasket leak...it was back firing pretty bad too rpm always jump from300-1500. __________________ One after market part = 3 months of Ramen noodles.

04-26-2004, 09:55 AM	#3
KOUKI KA-T Zilvia FREAK! Join Date: Feb 2003 Location: Portland, Maine Posts: 1,085 Trader Rating: (0) Feedback Score: 0 reviews	Don't use a fuel system cleaner, the plastic used on Nissan injectors can't handle most of them. Pick up a can of that stuff and read the back label, most say not to be used on nissans. Some people still do but i wouldn't risk it.

04-27-2004, 01:35 PM	#4
blitzkrieg59 Join Date: Sep 2003 Location: Davenport, IA Age: 41 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	Alright, no fuel systems cleaner. Good to know. I don't know why it never occured to me to check all the vacuum lines and boots.