THIS SEEMS TO BE GOING AROUND! - ZR-1 Net Registry Forums

oricale · 04-17-2012

Hello all!..as you know I have been rebuilding my Z, and with much help from the site and WAZOO, It is running and looking better every moment,...BUT

As with some of my brethren here I have a IDLE ISSUE AS WELL!

here is where I am...

*upon start up idles at 1000 to 1200 RPM, NO fluctuation
*after warm up it starts to fluctuat from 700-1200 over and over and over...
*on the road throttle wants to stick on slow-down at around 2000 and i have to tap the gas to get it down,...NOW..coasting at 10-15 MPH will not allow it to drop...you can tap on it and stays as about 1400....difference?...when at stop it WILL go to 700 RPM,..

what have I done?

*replaced the vacuum tube to the LIMITED things I have due to eliminating the scondaries....
*replaced the IAC valve
*cleaned the PCV valves so they have that "sound"
* plugged up the PCV line to the plenum as well as the booster line (to eliminate the booster and pcv lines)>>>>>>>>>>>the idle drops down but still cycles at that lower rpm
* made sure the throttle body was tight.

But!!!!!!the throttle seem to need forceto open up the larger plates when driving....(sort of like needing to push th peddle over a slight "cleft" to make the mopen...IS THAT NORMAL?....IT SHOULD BE A SMOOTH TRANSITION RIGHT?

OK, I will be uploading everything since the timing and installation,....there are a few other small issues but I am doing everything I can to make it ready for BG.

question: could a small hole in the cruise control bellows cause this???

Could you use your help, ideas please!!!

04-17-2012	#1
oricale Join Date: Oct 2011 Location: STAFFORD VA, Posts: 576	THIS SEEMS TO BE GOING AROUND! Hello all!..as you know I have been rebuilding my Z, and with much help from the site and WAZOO, It is running and looking better every moment,...BUT As with some of my brethren here I have a IDLE ISSUE AS WELL! here is where I am... upon start up idles at 1000 to 1200 RPM, NO fluctuation after warm up it starts to fluctuat from 700-1200 over and over and over... on the road throttle wants to stick on slow-down at around 2000 and i have to tap the gas to get it down,...NOW..coasting at 10-15 MPH will not allow it to drop...you can tap on it and stays as about 1400....difference?...when at stop it WILL go to 700 RPM,.. what have I done? replaced the vacuum tube to the LIMITED things I have due to eliminating the scondaries.... replaced the IAC valve cleaned the PCV valves so they have that "sound" * plugged up the PCV line to the plenum as well as the booster line (to eliminate the booster and pcv lines)>>>>>>>>>>>the idle drops down but still cycles at that lower rpm * made sure the throttle body was tight. But!!!!!!the throttle seem to need forceto open up the larger plates when driving....(sort of like needing to push th peddle over a slight "cleft" to make the mopen...IS THAT NORMAL?....IT SHOULD BE A SMOOTH TRANSITION RIGHT? OK, I will be uploading everything since the timing and installation,....there are a few other small issues but I am doing everything I can to make it ready for BG. question: could a small hole in the cruise control bellows cause this??? Could you use your help, ideas please!!! __________________ [B][I][COLOR=red]1990 ZR1[/COLOR][COLOR=black] [U]#00077 [COLOR=red]RED[/COLOR]/[COLOR=red]RED[/COLOR] (10Y022 PEP CAR) [/U][/COLOR][/I][/B][B][I][COLOR=red]1991 ZR1[/COLOR][COLOR=black] [U]#00517 ("Irene")[COLOR=red]WHITE[/COLOR]/[COLOR=red]RED-SOLD:cry:[/COLOR] [B][/B] [/U][/COLOR][/I][/B][B][I][COLOR=red]1992 ZR1[/COLOR][COLOR=black] [U]#00445("The Revenant")[COLOR=red][COLOR="Black"]BLACK [/COLOR][/COLOR]/[COLOR=red]RED(2016 T.O.D!) [/COLOR] [/U][/COLOR][/I][/B] [B][I][COLOR=red]2009 [COLOR=red]Z06!![COLOR=black]BLK/BLK rare Linen interior[/COLOR] 707HP!![/COLOR] [/COLOR][/I][/B] [B][I][COLOR=red]2006[/COLOR] BLK/BLK Z51 (Just SICK FAST!)SOLD)[/I][/B] [B][I]1996 BLK/BLK LT4 Grnsprt(sold...Twice!)[/I][/B] [B][I]1991 RED/REDL98(Fell off the shipping truck:([/I][/B] [B][I]1980 BLK/RED L82(Sold)[/I][/B] [B][I][B][I]1990[/I][/B] RED/BLK(sold.....In Japan)[/I][/B] [I][COLOR=black][B][I]2006[/I][/B][/COLOR][/I] [COLOR=red]Mustang GT[/COLOR] ([B][I]mach 1[/I][/B])[B](sold)[/B] [COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1(sold in Japan)[/I][/B] [COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1#2(sold)[/I][/B] [B][I]WAZOO Member...[/I][/B] [url]www.evolution-motorsport.com[/url] facebook/evolutionmotorsportengineering Your Local [url]www.Amsoil.com[/url] dealer/user.. Victory Loves Preparation