AIR Pump replacement 92 LT1
Thread Starter
Racer
Joined: May 2004
Posts: 263
Likes: 0
From: Oconomowoc WI
AIR Pump replacement 92 LT1
I notoced something new today when I started my 92 Coupe. As I was letting it idle to warm up a high-pitched whistling started up from under the hood. I popped the hood and found that the noise was coming from the AIR Pump located in the compartment in front of the driver's side front wheel. It stopped after a minute or 2, but everytime I start it now, it does the same thing for a couple of minutes, then stops. I am assuming that the pump is starting to crap out on me and will need to be replaced soon. Has anyone done this yourself and is there anything difficult about it?
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
The pump is electric and is held in place by bolts. Should be a very straight forward replacement. There is a rubber tube from the pump to the AIR system but it's just held by a hose clamp.
There should be no need to remove anything else but you could remove the round vacuum housing to gain more room.
There should be no need to remove anything else but you could remove the round vacuum housing to gain more room.
Burning Brakes
Joined: Aug 2001
Posts: 1,238
Likes: 0
From: walled lake MI
i've removed the pump last year to get at the radiator shroud bolts. it was pretty straightforward, but some of the rubber ducting could be stubborn to come off.
mine's been wailing like a banshee at startup for over two years. it has not crapped out yet. if you ditch the pump altogether you will trigger a diagnostic code, unless you reprogram the ECM.
mine's been wailing like a banshee at startup for over two years. it has not crapped out yet. if you ditch the pump altogether you will trigger a diagnostic code, unless you reprogram the ECM.
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Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
$200+ core!!!!
Originally Posted by 92LT-1BoughtItRight
Thanks- yeah I figured if I removed it, it would throw a code. I have a rebuilt AIR pump coming- should be in Monday ($200+ core charge)
I was just fiddling with the one in my car. Dang, that's an expensive little bugger for something that doesn't actually make the car go faster! 
Good luck getting the air intake duct outta the way to access the radiator shroud. I used the "bend the plastic and pray" method. I got it out, but getting it back in oughtta be real fun...
Thread Starter
Racer
Joined: May 2004
Posts: 263
Likes: 0
From: Oconomowoc WI
OK- AIR pump came in today- replaced it in about a half hour. Not a bad job- just don't lose your grip on those pesky screws. Took a test drive and all is well. $180.00 total. No more whistle.
Le Mans Master
Joined: Oct 2003
Posts: 7,625
Likes: 4
From: Director of Bands
St. Jude Donor '08
Originally Posted by 92LT-1BoughtItRight
OK- AIR pump came in today- replaced it in about a half hour. Not a bad job- just don't lose your grip on those pesky screws. Took a test drive and all is well. $180.00 total. No more whistle.
Pro
Joined: Aug 2004
Posts: 544
Likes: 0
Wish I would have seen this post earlier.. I just took my air pump out. Could have saved you a few $$.
On removing the vacuum "sphere".. It looks to me like the hose routes somewhere other than the air pump. Does anyone know what this thing actually connects to??
On removing the vacuum "sphere".. It looks to me like the hose routes somewhere other than the air pump. Does anyone know what this thing actually connects to??
