C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

AC Programmer Replacement

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Old Sep 3, 2006 | 11:41 AM
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GACELT4
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Default AC Programmer Replacement

Looks like the AC Programmer on my '96 LT4 is shot. I'm in the process of removing the old one - other than becoming a contortionist, does anyone have any tips for disconnecting and pulling the old one out? Also, what's the best way to remove the vacuum lines (i.e. do they just pull out, screw in, etc.)?

I want to have an overall game plan before I'm in the floorboard upside down. Thanks!
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Old Sep 3, 2006 | 11:57 AM
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Default Remove seat

You will need to have 4 arms, a good back, great vision, nimble fingers,and a case of cold ones. Actually I found that the little amount of time it takes to remove the drivers seat, 4 bolts, and a few unplugs, makes a world of difference. Instead of trying to fit into that little area you can lay completely down.Good luck....G
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Old Sep 3, 2006 | 01:07 PM
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GACELT4
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From: Marietta GA
Default Vacuum Lines

Thanks for the tip - I'll definitely be removing the seat. I've climbed up under the dash once and got the nice side rail in the back (not exactly comfortable).

How do the vacuum lines attach to the module? These are the multi-colored lines that look like they plug into a rubber fitting that is connected to the module. Does the whole rubber fitting pop off if I pull hard enough, or should each line be disconnected from the fitting? I'm trying to minimize damage from the brute force method.
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Old Sep 3, 2006 | 03:44 PM
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Default Lines

Just unplug the lines where they go into the seat from the bottom. Dont pull to hard on anything as they should unplug rather easily. I find it easier to remove the front bolts first and tilt the seat backwards when unplugging. If you think you might get the lines mixxed up than put little pieces of tape with markings such as 1 for the hose and a 1 on the place where it plugs in and than 2 and so forth. Theres no way to get them mixxed up then.good luck....G
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Old Sep 3, 2006 | 06:44 PM
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From: Marietta GA
Default AC Programmer module

Thanks - I'll keep that in mind when I remove the seat. Labeling definitely helps to avoid confusion when re-installing things.

I actually meant the vacuum lines connected to the AC programmer itself. There are four lines coming into a soft rubber connecter that looks like it's bolted to the programmer. Should these lines be removed individually or does the whole rubber connector somehow come out?
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Old Sep 4, 2006 | 08:02 AM
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Default AC Programmer

Bump
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Old Sep 4, 2006 | 02:46 PM
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Default

Originally Posted by GACELT4
Thanks - I'll keep that in mind when I remove the seat. Labeling definitely helps to avoid confusion when re-installing things.

I actually meant the vacuum lines connected to the AC programmer itself. There are four lines coming into a soft rubber connecter that looks like it's bolted to the programmer. Should these lines be removed individually or does the whole rubber connector somehow come out?
Rubber connector comes out when you remove bolt in center of it. It locks connector to programmer.

It is a little tight, but it comes out, just be careful and patient when removing it.
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Old Sep 6, 2006 | 10:47 AM
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Default

Originally Posted by GACELT4
How do the vacuum lines attach to the module? These are the multi-colored lines that look like they plug into a rubber fitting that is connected to the module. Does the whole rubber fitting pop off if I pull hard enough, or should each line be disconnected from the fitting? I'm trying to minimize damage from the brute force method.
The set of vacuum lines are attached to the AC Programmer by a single center press-on type of nut. This has to be pry'ed off with a small screwdriver. All the vacuum lines are attached to the yellowish soft connector....do no pull on the individual lines...they do not pull out.

Once you get that blasted press nut off, then the vacuum line connector just pulls off. When you replace the AC programmer, suggest that you install a longer screw in the center of the vacuum connector and use a small washer and a locking nylon-insert nut...makes it much easier to use a socket to attach the vacuum connector to the AC Programmer. Oh and use a small drill bit and open up the ends of each vacuum line before you re-assemble it.

Good luck,
Lannyl81
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