NissanForums.com :: Nissan Forum - View Single Post - car idles great when the ac is on, not when off

DonaldHays · Sep 29th, 2005, 08:10 PM

Hey everyone,

I am still trying to track down the small weird from time to time idle issues I have with my 94 VG30 she now has almost 85k on her and its weird as it comes and goes at times and don’t always do this

Seems to do it more once I hit or get below half a tank of fuel, if the car is idling weird (bouncing within the 200-300 that she does I flip on the ac and she is fine then!) If you flip the ac back off she goes back to hunting and flip the ac back on and the idle is fine again (since the ac seems to cure the issue I want to rule out the fuel pump maybe going bad)

Wouldn’t flipping the ac on make the car demand more fuel and maybe fix low pressure and make it seem as if its not the fuel pump doing this. I also don’t hear the fuel pump whine or crying as I have seen others do before they go dead. Any tips? Of course the plugs/fuel filter/air filter/cap and rotor are all fine and replaced not very long ago

Thanks,

Donnie H.

Sep 29th, 2005, 08:10 PM	#1 (permalink)
DonaldHays Nissan Enthusiast Join Date: Jul 2004 Location: Oklahoma City, Ok Posts: 148	car idles great when the ac is on, not when off Hey everyone, I am still trying to track down the small weird from time to time idle issues I have with my 94 VG30 she now has almost 85k on her and its weird as it comes and goes at times and don’t always do this Seems to do it more once I hit or get below half a tank of fuel, if the car is idling weird (bouncing within the 200-300 that she does I flip on the ac and she is fine then!) If you flip the ac back off she goes back to hunting and flip the ac back on and the idle is fine again (since the ac seems to cure the issue I want to rule out the fuel pump maybe going bad) Wouldn’t flipping the ac on make the car demand more fuel and maybe fix low pressure and make it seem as if its not the fuel pump doing this. I also don’t hear the fuel pump whine or crying as I have seen others do before they go dead. Any tips? Of course the plugs/fuel filter/air filter/cap and rotor are all fine and replaced not very long ago Thanks, Donnie H.