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VIN 1N4DL01D81C160868
Thanks
Thanks.
When i start my car, sometimes the engine sounds way louder than it does normaly
does anyone have the same problem??
or it's not a problem at all??
Does anyone know if this works or should I bite the bullet and let the dealer reprogram the security keys?
This problem happens when the outside temperature is hot more than 79'F. When I turn on the AC and the car is idle and in Parking gear the RPM moves from 500 to 1000 and back to 500 every 3 seconds. Only when the RPM is at 1000, the AC blows cold air otherwise the AC blows fine but normal air. At the same time the second fan in the front of the engine kicks on and off and there is more noise at that time.
While driving on highway, I can also feel a drag when the AC is on. The AC comes on and goes off within 3 seconds repeatedly even while driving on highway. Please help.
This problem happens when the outside temperature is hot more than 79'F. When I turn on the AC and the car is idle and in Parking gear the RPM moves from 500 to 1000 and back to 500 every 3 seconds. Only when the RPM is at 1000, the AC blows cold air otherwise the AC blows fine but normal air. At the same time the second fan in the front of the engine kicks on and off and there is more noise at that time.
While driving on highway, I can also feel a drag when the AC is on. The AC comes on and goes off within 3 seconds repeatedly even while driving on highway. Please advice.
thnx
Thank you for your response. I appreciate that you took the time to answer. I am an engineer so I can safely assure say that this is not my problem and I'd venture a strong guess that it is not yours either. Not knowing your situation exactly I'd suggest that your issue does sound like it is an alignment issue. If it has been going on for a while you should be able to get some confirmation by inspecting your tires for improper wear patterns. If it is occurring only during breaking then have should have your brakes and calipers inspected. I suppose there are other factors to consider as well but I'd hate to steer you in the wrong direction (no pun intended) without knowing more information. Besides that I'm not a trained auto mechanic either. Again thank you for responding and I hope you are able to get your problem resolved.
Thank you,
Ray Danley
I wonder if anyone with 3.5SE ever experienced these "gusts", that model has different tires.
anyhow, the car is 4 months old. take it back to the dealership, pick up your rental (assuming you purchased the extended warranty) and let them worry about it.
I'll take the car to the dealer anyhow. And maybe worth trying fatter tires.
Warning: I did not research and I have NOT confirm w/ anyone but strongly suspect the Altima uses the Electric Power Assist Steering design or whatever they call it.
I suspect there is a malfunctioning or worse, inherent problem. I suggest asking to talk to the Nissan rep when he/she is in town so that enquiry with engineering can be considered if you dealer believes there is no issue with your car after it has been checked out.
The following is a good clip to explain how it works. It is basically a manual/mechanical steering system and on top of that, there is a electric motor which joins you to add the steering input to lighten you 'human' effort whenever your mechanical system starts turing and triggers/'tips' off the 'computer' to tell the motor to run. To me, that is partial 'fly by wire' (scary in real life but not on paper). Conceptually, I suspect you(your Altima's steering system) and I hope it is not we as all the owners or Nissan having a broader problem!!! ....your mechanical system is mistriggering; or its electronic/electrical portion due to sensing problem; or electronic interference, or any screw up in design therefore self-trigger, turns on the motor suddenly and sends you a surprising 'wind gust/swing'. I hope I am wrong and it is none of these. It is the fade of OUR LIVES at the mercy of some electrons because it is a less costly design.
Safety consideration when designing? - the engineers probably all convince themselves that our hands are supposed to be on the steering wheel and are still controlling the mechanical system which can overpower any such crazy electric motor malfunction and therefore checked it off as NO RISK. It means, thou shall never just hold you wheel with two fingers and the other hand elsewhere!!!??
This car aleady has no caster effect (steering wheel does not return by itself), it does not hold itself straight on a straigh road, and that makes it much more surprising when it happens. To see what I mean,watch the steering wheel when you are crusing, you turn it lightly left, the wheet will stay there on a left turn until you are in the ditch!!
However, I will not rule out mechanical issue although it is unlikely since something this loose, you will notice. At low speed, jerk you wheel left-right'left-right quickly and over some bumpy road is even better to detect if you steering has any significant 'play' (void/space) when you change direction to indicate a big mechanical gap caused by some linking point not tightened, the steering rack is too far from your pinion, or things like that.
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Direct electric steering uses an electric motor attached to the steering rack via a gear mechanism (no pump or fluid). A variety of motor types and gear drives is possible. A microprocessor controls steering dynamics and driver effort. Inputs include vehicle speed and steering, wheel torque, angular position and turning rate.
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Working In Detail:
A "steering sensor" is located on the input shaft where it enters the gearbox housing. The steering sensor is actually two sensors in one: a "torque sensor" that converts steering torque input and its direction into voltage signals, and a "rotation sensor" that converts the rotation speed and direction into voltage signals. An "interface" circuit that shares the same housing converts the signals from the torque sensor and rotation sensor into signals the control electronics can process.
Inputs from the steering sensor are digested by a microprocessor control unit that also monitors input from the vehicle's speed sensor. The sensor inputs are then compared to determine how much power assist is required according to a preprogrammed "force map" in the control unit's memory. The control unit then sends out the appropriate command to the "power unit" which then supplies the electric motor with current. The motor pushes the rack to the right or left depending on which way the voltage flows (reversing the current reverses the direction the motor spins). Increasing the current to the motor increases the amount of power assist.
The system has three operating modes: a "normal" control mode in which left or right power assist is provided in response to input from the steering torque and rotation sensor's inputs; a "return" control mode which is used to assist steering return after completing a turn; and a "damper" control mode that changes with vehicle speed to improve road feel and dampen kickback.
If the steering wheel is turned and held in the full-lock position and steering assist reaches a maximum, the control unit reduces current to the electric motor to prevent an overload situation that might damage the motor. The control unit is also designed to protect the motor against voltage surges from a faulty alternator or charging problem.
The electronic steering control unit is capable of self-diagnosing faults by monitoring the system's inputs and outputs, and the driving current of the electric motor. If a problem occurs, the control unit turns the system off by actuating a fail-safe relay in the power unit. This eliminates all power assist, causing the system to revert back to manual steering. A dash EPS warning light is also illuminated to alert the driver. To diagnose the problem, a technician jumps the terminals on the service check connector and reads out the trouble codes.
As for the car's steering feel - it is perfect and any speed, no "play" whatsoever.
Also, it is encouraging that you have not experienced these "gusts" on your 3.5SE, which has better tires (and the same body), which would make it easily fixable.
You could also measure the amperage on the battery when the car is turned off. You could have some device that continues to draw power.
Any suggestions?
- I didn't have a chance to go back and look at it yet, but I'm thinking battery, alternator, belt? Maybe a fun combo of both.
Good Luck.
E.D. ISF
http://www-odi.nhtsa.dot.gov/ivoq/index.cfm
If every one who has this problem we may save someone's life if we can effect recall. In addition we may be reinbursed.
I just purchased a 2006 Altima, 2.5S. This actually my 2nd as the first one had a trunk leak they were unable to fix after 1 and a half months, but in any case:
I am hearing a rushing water noise...just like..if in a bathtub you move the water back and forth and it sloshes around. I only hear this when slowly accelerating from 0 to about 20 or 30 Kmh.
It doesn't happen all the time, but often enough that it's definitely alarming.
Has anyone else experienced this?
There are no viewable mechanical defects as I just took it for an oil change today...and no leaks on outside of inside of car that I can detect.
Thanks!