mark b

I have no resistance in the steering, at fast speeds and cornering on the track I have to really be smooth with the steering to not over turn because the steering is too responsive and light..

How can one fix this so I have more resistance and firmness when speeds increase? can it be fixed? is it a programming issue or a mechanical one? thanks

mark b

ttt

chaase

Have you changed the fluid at all before? I didn't see a change interval in the owners manual, but it may be worth changing the fluid.

87SAM

I take it that there are no codes?

cdkcorvette7

pull your codes. If it's an electrical issue you should have codes.

mark b

no codes

dgrant3830

I believe I've only heard of one possible PS Pump failing before this and even then, the OP for that particular issue, never came back and posted results, so I don't know if that was the cause or not. My first thought is that you have air trapped in the system. Try there in your driveway or in a parking lot, doing several full swings both directions of the steering and see if it changes anything. Check the magnasteer connector and insure its clean and properly plugged in and secured. Assuming the PS fluid is not burnt in anyway otherwise change the fluid as already suggested. Do you hear any play in the steering when rocking the steering wheel back and forth with the engine off? Does the car feel lose?

mark b

The PS is Ok, the level is good, The steering is quiet, but it feels too light at low speeds and sometimes yes the car feels loose even though i have a Z06 suspension with bilstein sports... the steering feels loose, almost like the steering wheel is not accurate with the direction of the wheels.. it feels like the steering is not in sync with the wheels, yet the car does everything fine if i concentrate on being smooth with the steering and taking my time. sometimes it feels like if i turn alot, the
tires are not in sync like they are trying to catch up with the steering and it feels loose..
I had a 2000 corvette that had the same set up and its steering was pretty precise and i felt that everything was in sync and i could feel what the front tires are doing

with this car i dont, and i dont know why... could the magnasteer be failing?

dgrant3830

Checked your alignment lately? You can do a wheel bearing deflection measurement by getting the wheel off the ground and see if the top of the tire, deflects no more than 1/16th of an inch at the top of the tire, sideways towards the center of the car.

Bill Dearborn

When there is no electrical input to the Magnasteer it will default to a higher boost steering setting so the steering can be turned when parking the car. How did you check the codes? Using the DIC or using an OBD scanner. The codes are ABS codes since Magnasteer gets its inputs from the EBCM so you need to use the DIC or a scanner that can read ABS codes.

From the Service Manual:
Variable Effort Steering System Operation
The variable effort steering (VES) system uses inputs from the ABS wheel speed sensors and steering wheel position sensor to the EBCM to determine the desired amount of power steering assist.

The power steering pump actuator has a pintle that moves in and out of an orifice, regulating power steering fluid flow. The EBCM can change the amount of current flowing through the actuator. If the actuator is disconnected, the pintle will retract out of the orifice for maximum power steering assist.

The EBCM has the ability to detect malfunctions in the steering wheel position sensor, the actuator or the circuitry to those components. Any malfunction detected will cause the power steering assist to remain at maximum with the pintle in its normally retracted position for all speeds.

When the system is operating normally, increasing the vehicle speed will decrease power steering assist, allowing the driver to have improved road feel and directional stability. When the EBCM steering wheel position sensor detects sudden steering maneuvers, the EBCM reduces the actuator current in order to provide maximum steering assist.

Variable Effort Steering Circuit Operation
When the Electronic Brake Traction Control Module (EBTCM) commands the Magnasteer Actuator ON, B+ is supplied through the EBTCM connector terminal C to the MAGNASTEER actuator connector C107 terminal A. Ground/control for the MAGNASTEER actuator is provided through the EBTCM connector terminal F to MAGNASTEER actuator connector C107 terminal B. The EBTCM controls the amount of current supplied to the MAGNASTEER actuator based on the input from the wheel speed sensors.

See the attached diagnostic.


Bill

mark b

Thanks Bill, that seems to be the problem, Ill have the abs codes checked and see if anything is fishy, and ill get a new alignment to see if that helps too... I was just driving it this morning and the car felt better it is weird