power steering is jumpy
Thread Starter
Instructor
Joined: Mar 1999
Posts: 213
Likes: 0
From: Pea Ridge. Arkansas
I had the control valve replace a few years ago, and its wasnt as bad as it is now. It always seemed like I had too much power steering, like I can't feel the road. I have got used to it, but now it drives me nuts 
when trying to park. I will ck the belt, but how do I ck the control valve.
Jeff
when trying to park. I will ck the belt, but how do I ck the control valve.Jeff
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by offaxis
I had the control valve replace a few years ago, and its wasnt as bad as it is now. It always seemed like I had too much power steering, like I can't feel the road. I have got used to it, but now it drives me nuts when trying to park. I will ck the belt, but how do I ck the control valve.
Jeff
when trying to park. I will ck the belt, but how do I ck the control valve.Jeff
Instructor
Joined: Apr 2006
Posts: 147
Likes: 0
From: New Jersey
The conditions described sounds like a defective power steering control valve.
I personally had a similar situation with a remanufactured control valve that I installed about a month ago. The cure was to install a brand new GM control valve. That solved the problem.
I personally had a similar situation with a remanufactured control valve that I installed about a month ago. The cure was to install a brand new GM control valve. That solved the problem.
Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 113
From: Saginaw Michigan
Just to make thing clearer: The Corvette power steering CONTROL VALVE is located on the end of the relay rod and connects to the pitman arm on the steering gear. The power steering pump FLOW CONTROL VALVE is located inside the power steering pump just behind the outlet fitting. It is actually a sliding plunger valve. It is manufactured to a very exacting diameter. (The bore in the power steering pump that accepts the valve is also a very critical diameter.)
If the pump flow control valve is sticking, you will have erratic power assist. It can become gummed up with years of varnish, sludge, etc from 30+ years of use. I have heard of remanufactured pumps with valves that are sticking because of incorrect remanufacturing tolerances.
The power steering control valve can cause erratic assist one side versus the other. Or more assist one direction or the other. I am sure that a sticking plunger in the control valve could cause erratic assist.
Jim
(from Prague in the Czek Republic)
If the pump flow control valve is sticking, you will have erratic power assist. It can become gummed up with years of varnish, sludge, etc from 30+ years of use. I have heard of remanufactured pumps with valves that are sticking because of incorrect remanufacturing tolerances.
The power steering control valve can cause erratic assist one side versus the other. Or more assist one direction or the other. I am sure that a sticking plunger in the control valve could cause erratic assist.
Jim
(from Prague in the Czek Republic)
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Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by Jim Shea
Just to make thing clearer: The Corvette power steering CONTROL VALVE is located on the end of the relay rod and connects to the pitman arm on the steering gear. The power steering pump FLOW CONTROL VALVE is located inside the power steering pump just behind the outlet fitting. It is actually a sliding plunger valve. It is manufactured to a very exacting diameter. (The bore in the power steering pump that accepts the valve is also a very critical diameter.)
If the pump flow control valve is sticking, you will have erratic power assist. It can become gummed up with years of varnish, sludge, etc from 30+ years of use. I have heard of remanufactured pumps with valves that are sticking because of incorrect remanufacturing tolerances.
The power steering control valve can cause erratic assist one side versus the other. Or more assist one direction or the other. I am sure that a sticking plunger in the control valve could cause erratic assist.
Jim
(from Prague in the Czek Republic)
If the pump flow control valve is sticking, you will have erratic power assist. It can become gummed up with years of varnish, sludge, etc from 30+ years of use. I have heard of remanufactured pumps with valves that are sticking because of incorrect remanufacturing tolerances.
The power steering control valve can cause erratic assist one side versus the other. Or more assist one direction or the other. I am sure that a sticking plunger in the control valve could cause erratic assist.
Jim
(from Prague in the Czek Republic)
