Fast Idle - ZR-1 Net Registry Forums

Route 66 · 02-05-2012

I just started my car after replacing all the injectors. Started it an let it come up to temp. It idles ok but too high of RPM. Idles at 1100. Any one know what I might have done wrong. I thought I would check here first before takeing it apart again.. Thanks..E..

GOLDCYLON · 02-05-2012

Cheack your map sensor hose on the back side the plenuim. It prob came off

XfireZ51 · 02-06-2012

Possibly may need to reset IAC.

Route 66 · 02-06-2012

Quote:

Originally Posted by GOLDCYLON

Cheack your map sensor hose on the back side the plenuim. It prob came off

Thanks for your help. I will check that tomorrow. I feel sure I put it on. Sometime back that hose came off when the motor backfired an it had a miss. That isn;t happening now it runs smooth. But I will check it.............Thank You..E

Route 66 · 02-06-2012

Quote:

Originally Posted by XfireZ51

Possibly may need to reset IAC.

How do I do that..E

GOLDCYLON · 02-06-2012

Other possibilities ...

http://www.zr1.net/forum/showthread.php?t=11753

Vac leaks and hose next to the front of the plenum behind the air horn may have popped off

Route 66 · 02-06-2012

I would like to thank all of you for your help with this. Goldcylon your link was the most helpful. Thanks for taking the time to look it up. It has given me a number of things to look at. Although I think I will be pulling the plenum. I think I now know where the leak will be. I never thought about it being a vacuum leak. I was thinking electrical....Thanks Again..E

bdw18_123 · 02-06-2012

I had a high idle problem too after I got my Z back together. Mine was higher at like 3K rpm though. Turned out that my TPS was not adjusted correctly.

So you might also want to check that your TPS (throttle position sensor) is properly calibrated. There is a procedure in the service manual that outlines how to check and adjust it.

Route 66 · 02-06-2012

Quote:

Originally Posted by bdw18_123

I had a high idle problem too after I got my Z back together. Mine was higher at like 3K rpm though. Turned out that my TPS was not adjusted correctly.

So you might also want to check that your TPS (throttle position sensor) is properly calibrated. There is a procedure in the service manual that outlines how to check and adjust it.

Thanks..I will look into that if what I found today doesn;t fix it. I took the plinum back off today. I found one of the larger plastic tubes was loose. I glued it back in. Tomorrow I will put it back togather an I will try again. I will read about the TPS tonight incase I have to go there........ Thanks E.

GOLDCYLON · 02-06-2012

If you can a clamp or ziptie can work wonders keeping these little buffers in place

02-05-2012	#1
Route 66 Join Date: Dec 2006 Location: Paris Texas Posts: 182	Fast Idle I just started my car after replacing all the injectors. Started it an let it come up to temp. It idles ok but too high of RPM. Idles at 1100. Any one know what I might have done wrong. I thought I would check here first before takeing it apart again.. Thanks..E.. Last edited by Route 66; 02-05-2012 at 11:17 PM.

02-05-2012	#2
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Fast Idle Cheack your map sensor hose on the back side the plenuim. It prob came off __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

02-06-2012	#3
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Re: Fast Idle Possibly may need to reset IAC.

02-06-2012	#6
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Fast Idle Other possibilities ... http://www.zr1.net/forum/showthread.php?t=11753 Vac leaks and hose next to the front of the plenum behind the air horn may have popped off __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 02-06-2012 at 12:40 AM.

02-06-2012	#7
Route 66 Join Date: Dec 2006 Location: Paris Texas Posts: 182	Re: Fast Idle I would like to thank all of you for your help with this. Goldcylon your link was the most helpful. Thanks for taking the time to look it up. It has given me a number of things to look at. Although I think I will be pulling the plenum. I think I now know where the leak will be. I never thought about it being a vacuum leak. I was thinking electrical....Thanks Again..E Last edited by Route 66; 02-06-2012 at 12:52 PM.

02-06-2012	#8
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 809	Re: Fast Idle I had a high idle problem too after I got my Z back together. Mine was higher at like 3K rpm though. Turned out that my TPS was not adjusted correctly. So you might also want to check that your TPS (throttle position sensor) is properly calibrated. There is a procedure in the service manual that outlines how to check and adjust it. __________________ [IMG]http://i13.photobucket.com/albums/a292/bdw18_123/_zr1netforumsigphoto.jpg[/IMG][B] 1990 Corvette ZR-1 [/B][I] White/Flame Red, #2299, mostly stock, 144K miles.[/I] -Cams timed to the '93-'95 405HP LT5 stock timing. -IAT sensor relocated to below front bumper. -Haibeck hoops installed in airduct. -OBX cat-back exhaust. [COLOR=DarkRed][B](SOLD - December 2012 [/B][/COLOR][COLOR=DarkRed][B]:hello:)[/B][/COLOR] 1993 Corvette Coupe Black/Black, 6-speed (SOLD - October 2009 :hello:)

02-06-2012	#10
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: Fast Idle If you can a clamp or ziptie can work wonders keeping these little buffers in place __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V