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

A/C Vacuum [HELP]

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Old Jul 18, 2002 | 06:48 PM
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Default A/C Vacuum [HELP]

I've noticed on my 96 coupe that when i'm using the a/c, heater, defroster etc... it blows good and out of each location i select but when i accelerate the air flow coming out seems to fade depanding on how heavy I accelerate.(note under full throttle the air seems to stop completely) Has anybody experienced this type of problem before? Seems like some type of vacuum problem. :confused:
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Old Jul 18, 2002 | 07:15 PM
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Default Re: A/C Vacuum [HELP] (DanDman)

Sounds like a bad check valve.. not sure of the location on the LTx cars but should be at the back of the intake and may have 2 or 3 vacuum lines to it. it is only about 2" DIA MAX
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Old Jul 19, 2002 | 08:55 AM
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Default Re: A/C Vacuum [HELP] (-=Jeff=-)

In a 92 LT1 there is a T under the passenger side fuel rail cover.
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Old Jul 19, 2002 | 10:20 AM
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Default Re: A/C Vacuum [HELP] (-=Jeff=-)

Thanks Guys I'll check it out tonite. Hope it's something that simple.
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