started ka-t today runs good except idle is funny - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

nd240sx3 · 11-08-2004, 05:46 PM

ok what would cause idle to go up and down from 1k -2k ?, I just finished ka-t, and started her up today, and the idle goes up and down, up and down and doesnt settle at all. anyone have an idea what it could be? please let me know thanx

drift into a curb · 11-08-2004, 06:38 PM

vacuum leak.

nd240sx3 · 11-08-2004, 07:59 PM

well i checked tps, and when car is off safc says volts are 4, which is good. and when car is running .5, which is good. but now idle is at 2k and steady so i am goin to try idler next and see what happens. if anyone has any other ideas feel fre and let me know thanx

fastpace · 11-08-2004, 09:17 PM

What is your setup?

nd240sx3 · 11-08-2004, 09:34 PM

stock internals, 370 sr injectors, t3/t4 turbo, apexi safc2, walboro fuel pump.
and now the idle doesnt go up and down but stays at a steady 2k, soo i am thinkin of the iaa adjusting screw, i will try tommorrow, does anyone else have any ideas? thanx

speeddreamz · 11-08-2004, 09:40 PM

Possibly your injectors, they're 370 right maybe the compensation is not right for the injectors. Also, Maf could be bad ? or vacume leak as they said.

fastpace · 11-08-2004, 10:09 PM

Are you using stock mafs? Let us know what happens when you adjust the adjusting screw. This may sound dumb, but I would also check my brake booster. One time when I was trouble shooting my ka-t it was idling really high and the brake booster in the rear of the car was not connected and idling went down. Also, check your setup a couple of times to make sure everything else is running fine.

11-08-2004, 05:46 PM	#1
nd240sx3 Zilvia Junkie Join Date: Feb 2003 Location: warminster pa Age: 44 Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	started ka-t today runs good except idle is funny ok what would cause idle to go up and down from 1k -2k ?, I just finished ka-t, and started her up today, and the idle goes up and down, up and down and doesnt settle at all. anyone have an idea what it could be? please let me know thanx

11-08-2004, 06:38 PM	#2
drift into a curb Post Whore! Join Date: Mar 2002 Location: Seoul, South Korea Posts: 2,870 Trader Rating: (5) Feedback Score: 5 reviews	vacuum leak. __________________ Go big or go home!

11-08-2004, 07:59 PM	#3
nd240sx3 Zilvia Junkie Join Date: Feb 2003 Location: warminster pa Age: 44 Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	no vac leak boost gauge says -20 well i checked tps, and when car is off safc says volts are 4, which is good. and when car is running .5, which is good. but now idle is at 2k and steady so i am goin to try idler next and see what happens. if anyone has any other ideas feel fre and let me know thanx

11-08-2004, 09:17 PM	#4
fastpace Zilvia Addict Join Date: Jul 2001 Location: Houston, TX Age: 43 Posts: 689 Trader Rating: (0) Rides Gallery: fastpace Feedback Score: 0 reviews	What is your setup? __________________ life is what you make of it!!!! "well, I go out, I do the practice, I think about it and I concentrate on one small thing I can change that will have an effect. I make that change then I go out and drive to my maximum." -Ayrton Senna

11-08-2004, 09:34 PM	#5
nd240sx3 Zilvia Junkie Join Date: Feb 2003 Location: warminster pa Age: 44 Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	setup is stock internals, 370 sr injectors, t3/t4 turbo, apexi safc2, walboro fuel pump. and now the idle doesnt go up and down but stays at a steady 2k, soo i am thinkin of the iaa adjusting screw, i will try tommorrow, does anyone else have any ideas? thanx

11-08-2004, 09:40 PM	#6
speeddreamz Zilvia FREAK! Join Date: Jan 2003 Location: San Francisco, California Age: 40 Posts: 1,015 Trader Rating: (0) Feedback Score: 0 reviews	Possibly your injectors, they're 370 right maybe the compensation is not right for the injectors. Also, Maf could be bad ? or vacume leak as they said.

11-08-2004, 10:09 PM	#7
fastpace Zilvia Addict Join Date: Jul 2001 Location: Houston, TX Age: 43 Posts: 689 Trader Rating: (0) Rides Gallery: fastpace Feedback Score: 0 reviews	Are you using stock mafs? Let us know what happens when you adjust the adjusting screw. This may sound dumb, but I would also check my brake booster. One time when I was trouble shooting my ka-t it was idling really high and the brake booster in the rear of the car was not connected and idling went down. Also, check your setup a couple of times to make sure everything else is running fine. __________________ life is what you make of it!!!! "well, I go out, I do the practice, I think about it and I concentrate on one small thing I can change that will have an effect. I make that change then I go out and drive to my maximum." -Ayrton Senna