85 erratic idle when warmed up
Thread Starter
8th Gear
Joined: Oct 2014
Posts: 8
Likes: 0
85 erratic idle when warmed up
I have an 85 corvette the car just doesn't want to idle once it has warmed up. It has the a/c and a.i.r. delete, a Taylor throttle body spacer, I have replaced the IAC, TPS, and the MAF sensors, I'm stuck, any help would be greatly appreciated thanks!
Melting Slicks
Joined: May 2014
Posts: 2,895
Likes: 592
From: New Port Richey FL
Have you looked for Vacuum Leaks? also if your O-2 Sensor is not working correctly it can effect your Idle. O-2 Sensor can and do wear out with 30 plus year old cars so if you know it's been replaced,tested and working great. If not I would look into it.
Has the Cam been replaced? if so was a too Radical a cam installed,To much above Factory can Greatly Effect Idle.
Last edited by s carter; May 8, 2016 at 07:02 PM.
Team Owner
Joined: Jul 2004
Posts: 28,475
Likes: 3,291
From: Hartford WI
I don't know if the TB spacer might have affected the IAC by blocking it off or something. Start with the simple. Get that dead weight off. It doesn't do anything more than lighten your wallet from what I have seen in people who have had them.
Next, why did you replace the IAC? Did you take the housing off and the TB off and clean all the passages? Did you change all the gaskets?
If you have already done that, hook up a scanner and see what the IAC counts are.
Or we can simply start guessing and replacing parts till something works.
Next, why did you replace the IAC? Did you take the housing off and the TB off and clean all the passages? Did you change all the gaskets?
If you have already done that, hook up a scanner and see what the IAC counts are.
Or we can simply start guessing and replacing parts till something works.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
I don't know if the TB spacer might have affected the IAC by blocking it off or something. Start with the simple. Get that dead weight off. It doesn't do anything more than lighten your wallet from what I have seen in people who have had them.
Next, why did you replace the IAC? Did you take the housing off and the TB off and clean all the passages? Did you change all the gaskets?
If you have already done that, hook up a scanner and see what the IAC counts are.
Or we can simply start guessing and replacing parts till something works.
Next, why did you replace the IAC? Did you take the housing off and the TB off and clean all the passages? Did you change all the gaskets?
If you have already done that, hook up a scanner and see what the IAC counts are.
Or we can simply start guessing and replacing parts till something works.
with aklim, hooking up to a scanner will show you what sensors are working properly, and which aren't...Like mentioned above , with these cars you either hook up to a scanner , or throw parts at the problem until you either get lucky , or go broke...
..WW.
.
Last edited by WW7; May 12, 2016 at 06:50 AM.
