Irradic idle - Page 2 - ZR-1 Net Registry Forums

Rodney McDaniel · 10-08-2020

Hi guys, car has 84,000 miles. Car has seen setting a lot since 2012, it was the original injectors, one of the coils had been replaced (so I replaced all with AcDelco parts) I try to use name brand quality parts. I cleaned the Iac valve,(intake system very dirty ) seemed to help. When idle is varying now it's between 1100 and 800 rpm, sometimes it's steady about 750 rpm. We'll see next time I take it out. Maybe it just needs some run time. I have a Matco obd 1 but truthfully I don't know anything about it.

tccrab · 10-08-2020

Sounds like a vacuum leak.
If your Z is a '90, see the following link.
Had the exact same problem on mine.

http://www.zr1.net/forum/showthread.php?t=32275

'Crabs

Rodney McDaniel · 10-17-2020

Hi guys, replaced the iac valve , new intake air sensor seems to be running much much better and a better quality idle. Thanks to all for there input.

10-08-2020	#11
Rodney McDaniel Join Date: Aug 2020 Location: Parkville Md. 21234 Posts: 9	Re: Irradic idle Hi guys, car has 84,000 miles. Car has seen setting a lot since 2012, it was the original injectors, one of the coils had been replaced (so I replaced all with AcDelco parts) I try to use name brand quality parts. I cleaned the Iac valve,(intake system very dirty ) seemed to help. When idle is varying now it's between 1100 and 800 rpm, sometimes it's steady about 750 rpm. We'll see next time I take it out. Maybe it just needs some run time. I have a Matco obd 1 but truthfully I don't know anything about it.

10-08-2020	#12
tccrab Join Date: Oct 2004 Location: Folsom CA Posts: 1,653	Re: Irradic idle Sounds like a vacuum leak. If your Z is a '90, see the following link. Had the exact same problem on mine. http://www.zr1.net/forum/showthread.php?t=32275 'Crabs __________________ TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B]

10-17-2020	#13
Rodney McDaniel Join Date: Aug 2020 Location: Parkville Md. 21234 Posts: 9	Re: Irradic idle Hi guys, replaced the iac valve , new intake air sensor seems to be running much much better and a better quality idle. Thanks to all for there input.