Newbie trying learn!
02-22-2018, 08:13 AM
#1
Newbie trying learn!
I have a 99 vette and I notice I have a hose that is connected to something under my driver side headlight, lead back to the firewall but it's plugged off. Any clues??
Thx
Mick
Thx
Mick
02-22-2018, 08:45 AM
#3
02-22-2018, 09:26 PM
#4
Administrator
Member Since: Mar 2001
Location: In a parallel universe. Currently own 2014 Stingray Coupe.
Posts: 342,590
Received 19,188 Likes
on
13,911 Posts
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-
'20-'21-'22-'23-'24
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
A pic here might help with an answer. 
02-22-2018, 10:31 PM
#5
Le Mans Master
The air pump is mounted in that area by the left headlight. Maybe the pump doesn't function anymore and someone did a halfassed modification to the system.
...maybe give him some more details to pin it down
02-23-2018, 08:32 PM
#10
Team Owner
Member Since: Sep 2002
Location: Bonita Springs, Florida
Posts: 21,810
Received 3,035 Likes
on
2,022 Posts
That the air injection pump.
02-23-2018, 09:55 PM
#12
Team Owner
Member Since: Sep 2002
Location: Bonita Springs, Florida
Posts: 21,810
Received 3,035 Likes
on
2,022 Posts
Yes it's emissions related. It's a pump that injects fresh air into the exhaust stream to help to burn any unburned and partially burned fuel in the exhaust to reduce tailpipe emissions. Also referred to as a smog pump or secondary air pump.
Principle of the secondary air system:
Principle of the secondary air system:
The following users liked this post:
MikeG37 (02-23-2018)
02-24-2018, 12:03 AM
#14
Le Mans Master
Interestingly, that is the air pump of which I mentioned. In my own car I was having problems with the system setting codes so I had the computer tuned to delete it and removed all the components. My car still passes New Jersey inspection.
