headlamp issue - is this a quick fix?
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Pro
Joined: Aug 2004
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From: Schuylkill County PA
headlamp issue - is this a quick fix?
I'm sure this is a common Corvette issue. My driver's headlamp tends to "wink" under throttle. I figure it's probably a vacuum problem, but how do I go about correcting it?
Melting Slicks
Joined: Jul 2005
Posts: 2,545
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From: 406ci SB, AFR 180 Heads - 490 HP @5,600 RPM 529 lb-ft @ 4,100 RPM
Here's a link to a site that will help you figure out yhr issue. Just click on "vacuum trouble" once you are there... good luck
http://www.corvette-101.com/
http://www.corvette-101.com/
Thread Starter
Pro
Joined: Aug 2004
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From: Schuylkill County PA
Okay, I read the troubleshooting guide and the first steps I took was to replace both the check valve and filter from the manifold. This didn't fix the problem 
Without hooking up the vacuum pump to all the components I'm thinking a bad actuator relay valve?? It only affects the driver's headlamp, and only under heavy throttle (i.e., going up hills). Also I now realize my headlamps do not go up like they should when the car isn't running.
Without hooking up the vacuum pump to all the components I'm thinking a bad actuator relay valve?? It only affects the driver's headlamp, and only under heavy throttle (i.e., going up hills). Also I now realize my headlamps do not go up like they should when the car isn't running.
Safety Car
Joined: Sep 1999
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From: AnyTown NJ
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Originally Posted by Duke94
There is a vacuum check valve in the line coming from the manifold to the resevoir tank. Sounds like yours is bad so the vacuum in the tank follows the manifold vacuum. Cheap fix.
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From: Flower Mound Texas
Originally Posted by PSU 98
Okay, I read the troubleshooting guide and the first steps I took was to replace both the check valve and filter from the manifold. This didn't fix the problem Without hooking up the vacuum pump to all the components I'm thinking a bad actuator relay valve?? It only affects the driver's headlamp, and only under heavy throttle (i.e., going up hills). Also I now realize my headlamps do not go up like they should when the car isn't running.
Without hooking up the vacuum pump to all the components I'm thinking a bad actuator relay valve?? It only affects the driver's headlamp, and only under heavy throttle (i.e., going up hills). Also I now realize my headlamps do not go up like they should when the car isn't running.
Thread Starter
Pro
Joined: Aug 2004
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From: Schuylkill County PA
Just to reiterate: I have installed a new check valve. I made sure it was installed just like the old one was removed (the old one was original, so I don't think that was installed the wrong way).
I will check all the headlamp springs, just to rule that out.
Razorhorn, keep me updated! I'm thinking a leaky actuator valve,based on the fact that it only affects one side and the reservoir doesn't seem to be holding vacuum.
I will check all the headlamp springs, just to rule that out.
Razorhorn, keep me updated! I'm thinking a leaky actuator valve,based on the fact that it only affects one side and the reservoir doesn't seem to be holding vacuum.
Melting Slicks
Joined: Nov 2001
Posts: 2,668
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From: Eastern US XX
Originally Posted by BarryK
be careful when replacing the check valves....... they must be installed in the correct direction.
Easy mistake to make if you aren't aware of this.
Easy mistake to make if you aren't aware of this.
Last edited by pws69; Jul 13, 2006 at 02:46 PM.
Thread Starter
Pro
Joined: Aug 2004
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From: Schuylkill County PA
Hey wxw,
I graduated from University Park in '98. Used to live across from Pennsylvania Pizza on College Avenue (geez I can't even remember the name of the apartment complex anymore).
I graduated from University Park in '98. Used to live across from Pennsylvania Pizza on College Avenue (geez I can't even remember the name of the apartment complex anymore).
Pro
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From: Flower Mound Texas
Originally Posted by PSU 98
Just to reiterate: I have installed a new check valve. I made sure it was installed just like the old one was removed (the old one was original, so I don't think that was installed the wrong way).
I will check all the headlamp springs, just to rule that out.
Razorhorn, keep me updated! I'm thinking a leaky actuator valve,based on the fact that it only affects one side and the reservoir doesn't seem to be holding vacuum.
I will check all the headlamp springs, just to rule that out.
Razorhorn, keep me updated! I'm thinking a leaky actuator valve,based on the fact that it only affects one side and the reservoir doesn't seem to be holding vacuum.