When I have my foot on the brake, when stopped
or moving slow I can't turn right, turning left is fine
I do have power steering, take my foot off the brake
and it works fine HELPIt's a 75

 

The previous owner was a Nascar Fan.

 

It use to turn both ways before new parts were installed

 

More info on what new parts installed is needed. If you have a new control valve it needs to be balanced.



Rick B.

 

Yes a new control valve and he said he balanced it
could he have not done it right, he has been
working on corvettes for years

 

Left only? Sounds like an Obama fan.

 

Your in Calif., everything turns to the left side there! Sorry.

Sounds like the control valve to me, but the part about whether your foots on the brake or not, puzzles me.

An improperly adjusted valve will cause difficulty in steering to one direction. I've seen both rebuilt PSCVs and brand new ones, that were bad, and couldn't be adjusted.

Did you change the PS pump? I've seen bad pumps cause a similar problem. I know a couple people who have had trouble with pumps bought from NAPA, that were supposed to be for a Corvette. What about the hoses, are they new too? It sounds like a pressure problem, so a bad pump, or weak hoses, that colapse under pressure, may be the problem.

The part about the brakes effecting it throws me, but it might just be that it's a slight pressure problem, and the added resistance of the brakes on a front wheel, may be enough to cause it?????

 

Why would your foot be on the brake if you were moving (turning)?

 

Backing out of a parking spot or driveway
also same pump, pump is about 3 years old.
Just changed the hoses and control valve

 

The real question is what does it do at high speed? If you're going 100 mph with your foot on the brake, can you turn to the right?

 

Yes
If you apply the brakes softley and not bottom the pedal
out it will turn, but you have to pull on the wheel very hard,
but if you apply the brakes hard, no it won't turn

 

maybe try selling it and be done with it.

 

you got to be kidding, please
lets have some help please thanks

 

You might also verify that the hoses from the control valve to the steering cylinder are connected properly. If you had the work done at a shop I'm suprised that they didn't road-test the car before giving it back to you.



Rick B.

 

The hoses are correct thanks

 

You could put the front end on jack stands and see if you can turn. What would happen if it's turned and then you put on the brakes?

 

I'd suggest checking a few items. The first is to make sure that the fluid level is correct though I think this would likely affect turning left more. Once you know that the fluid is at the correct level and not foaming or frothing, I'd rebalance the system. This is easy to do and at least would tell you that it was done correctly. Look at corvettefaq for step by step instructions.

 

I recently had some power steering issues that were similar to yours and I rebuilt my control valve. I bled the system according to the service manual, it seemed great in the garage and by the time I got to the end of the street I had zero power steering. Since that didn't fix the problem and it actually seemed to make it worse, I assumed I screwed up the rebuild (it's pretty easy but you never know) so I ordered a rebuilt from Van Steel. Put that valve in and the same thing. No power steering. The good news was it wasn't my rebuild. The bad news...no power steering. Here's what I learned...

Seems the bleeding proceedure in the manual is good if you change the pump, but not so good if you change the valve or cylinder. My flow control valve was stuck in the pump as a result of using that bleeding proceedure. Pulling it out/freeing it up, and bleeding correctly fixed the problem.

Here's how you bleed the system if you change anything other than the pump. With the front wheels off the ground, turn the steering wheel lock to lock once or twice. Check and top off the fluid. Do it again. When the fluid stays full, turn it lock to lock about two dozen times. Check and top off the fluid if necessary, start the engine for a few seconds, shut it off and check the fluid again. Once the fluid is topped off, start the engine, turn the steering wheel lock to lock a couple of times, put the car on the ground, turn the wheel lock to lock a couple of times and see if that does the trick.

Thanks to Jim Shea for his help!!

 

I read this post last night and and had the same thoughts about being on the brake pedal. I'm still trying to think why the difference is so drastic between brake on and brake off.
I will say when I was younger and had the strength to drive a vette with wide tires and NO power steering , it was almost impossible to turn the steering wheel while standing on the brake pedal,it was much easier to turn if you let the car roll a little.

 

Going slow and put the brake on I can turn left
power steering works fine, turn right it just locks up