Thread: Rpm drops down when turning steering wheel

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  1. #1 Rpm drops down when turning steering wheel 
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    Seems like my car lose power when I turn steering wheel or things that take power.

    Is it a battery* or alternator? Or maybe something else.?

    The battery is a year old*
    Grand Prix gt 1999 v6 3.8L coupe.
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  2. #2 Re: Rpm drops down when turning steering wheel 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    If you arent moving and turn the wheel its going to bog down the rpms because its really hard to steer the vehicle with no movement. The PS pump is working overtime and requires alot of energy to move that fluid.

    I'm sure it wouldn't hurt to have both the battery and alternator tested to make sure that they are okay, but if its only happening while your arent moving then I don't see a problem.

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  3. #3 Re: Rpm drops down when turning steering wheel 
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    It happens mostly when I'm trying to get out of parking.
    Than sometimes the rpm drops like almost kill the car. And sometimes keep stalling.
    Grand Prix gt 1999 v6 3.8L coupe.
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  4. #4 Re: Rpm drops down when turning steering wheel 
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    Power steering pump could be going bad.

    If the bearings are shot it will resist the pulley spin, slip, break your belt, etc causing all sorts of havoc.

    Or any other pulley going out for that matter.

    Check for whirring/groaning from the belt area.
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  5. #5 Re: Rpm drops down when turning steering wheel 
    Moderator Russosaur's Avatar
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    Mine does that, lights dim and such. I think its normal. I'v never stalled from it tho.
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  6. #6 Re: Rpm drops down when turning steering wheel 
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    Well. I know it causing bad idle sometimes because of low power.
    I think I'll look for a new alternator and see what going on.
    Grand Prix gt 1999 v6 3.8L coupe.
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  7. #7 Re: Rpm drops down when turning steering wheel 
    I live here. SlowNA06's Avatar
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    I had this exact problem with a bum battery. Alt was fine. Git yo batt tested.
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  8. #8 Re: Rpm drops down when turning steering wheel 
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    I got my battery at walmart for like 85 or something.
    How do u check the battery?
    Grand Prix gt 1999 v6 3.8L coupe.
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  9. #9 Re: Rpm drops down when turning steering wheel 
    Moderator Russosaur's Avatar
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    Quote Originally Posted by raverockstar View Post
    I got my battery at walmart for like 85 or something.
    How do u check the battery?
    Autozone can check it for free
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  10. #10 Re: Rpm drops down when turning steering wheel 
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    How do I know what is the normal voltage ?
    Grand Prix gt 1999 v6 3.8L coupe.
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  11. #11 Re: Rpm drops down when turning steering wheel 
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    I believe it would be around 12.4 volts without the car on and around 14v when the car is running. But I agree with what ffdp said.
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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