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

Lumbar air pump

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Old Dec 4, 2011 | 03:52 PM
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Default Lumbar air pump

The lumbar air pump on my 94 is dead. Motor spins but I can not get pressure. I am having trouble locating another pump. Anyone purchased a new one lately? What about jury rig swap using 93 pump. I think these are available. Help!
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Old Dec 4, 2011 | 04:59 PM
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Originally Posted by Steve731
The lumbar air pump on my 94 is dead. Motor spins but I can not get pressure. I am having trouble locating another pump. Anyone purchased a new one lately? What about jury rig swap using 93 pump. I think these are available. Help!
Mostly likely you just need a new pump diagram. They tend to rip after time. You can buy pump repair kits from any of the major vendors here. Or do a search, I know someone had made new diaphragms from inner tubes and did a post on it. I did this, but I lost some of the parts so I only fixed the driver side, only to discover my bladder or tubing does not hold the air.

I'll fix them someday, I can live with them for now.
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Old Dec 4, 2011 | 07:17 PM
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Default Lumbar pump

The 94's do not have a diaphragm pump. They have vane type pump.
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Old Dec 4, 2011 | 07:56 PM
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all ears here - same problem on my 96....
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Old Dec 5, 2011 | 12:18 PM
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Working on solution. Will keep the list posted
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Old Dec 5, 2011 | 07:33 PM
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Yeah, I read 94 then I read 93, my bad. Good luck.
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