Can someone explain this?
Thread Starter
Instructor
Joined: Jul 2006
Posts: 102
Likes: 0
From: Cary North Carolina
Can someone explain this?
My car's idle is inconsistent. Slight surges. I checked for vacuum leaks and I found a hose loose. I fixed it, the idle got better for a couple of days, then back to slight surges. I checked for more vacuum leaks and found another. I added a hose clamp, checked and no more leak. Again, the idle was fine for a couple of days. It is now inconsistent again?
What can be causing this? Seems like everything is fine once I find a leak and fix it, then a couple of days go by and another leak will show up somewhere else?
1986 L98
What can be causing this? Seems like everything is fine once I find a leak and fix it, then a couple of days go by and another leak will show up somewhere else?
1986 L98
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Sounds like you still have a vac leak somewhere, be it vac lines or intakes gasket, ect.
With my vacuum leak experience it would idle up and down while in open loop (<140* engine temp) and then idle fine after closed loop. Fix the leak and no more surging idle.
Have you check the vac line that connects to the bottom left of the TB from the EGR solenoid?
With my vacuum leak experience it would idle up and down while in open loop (<140* engine temp) and then idle fine after closed loop. Fix the leak and no more surging idle.
Have you check the vac line that connects to the bottom left of the TB from the EGR solenoid?
Thread Starter
Instructor
Joined: Jul 2006
Posts: 102
Likes: 0
From: Cary North Carolina
Originally Posted by RRT vette
Have you check the vac line that connects to the bottom left of the TB from the EGR solenoid?
The thing that is confusing me is this, why does it get better when I fix a leak, then it seems another leak appears? I found the loose hose and engine seemed to idle better. Within 48 hours, bad idle again. I check everything, find a leak, idles fine - then again, within 48 hours another leak?
Were these leaks there the whole time and I missed them? Were they there and got worse from me fixing the other leaks? Are they new leaks being caused by something else?
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by shilly
The thing that is confusing me is this, why does it get better when I fix a leak, then it seems another leak appears?
Originally Posted by shilly
I found the loose hose and engine seemed to idle better. Within 48 hours, bad idle again. I check everything, find a leak, idles fine - then again, within 48 hours another leak?
Originally Posted by shilly
Were these leaks there the whole time and I missed them?
Originally Posted by shilly
Were they there and got worse from me fixing the other leaks?
Originally Posted by shilly
Are they new leaks being caused by something else?
There is a sticker on the radiator cover that should show you a similar diagram that Agent86 posted in a different thread. This may differ from yours.
