Thread: Fuel pump whine when engine gets hot

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  1. #1 Fuel pump whine when engine gets hot 
    SE Level Member Skeeve's Avatar
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    Well, the title says it all, when my engine gets too hot(leak in rad) i hear a loud whining sound coming from under the car, sounds like the fuel pump is having to work extra hard to move fuel, i have also started smelling a strong gas smell lately...
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  2. #2 Re: Fuel pump whine when engine gets hot 
    Donating Users Liquifire's Avatar
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    How hot? Which car and motor do you have? What year? Do you smell the exhaust while in the car driving? Is it in the cabin of the vehicle or from the engine bay or out of the exhuast?
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  3. #3 Re: Fuel pump whine when engine gets hot 
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    Quote Originally Posted by Liquifire View Post
    How hot? Which car and motor do you have? What year? Do you smell the exhaust while in the car driving? Is it in the cabin of the vehicle or from the engine bay or out of the exhuast?
    It hits around 240 at the hottest, im riding a 99 GT V6 3.8 sedan, and its just outside at first but when the car gets up there i start smelling it inside just a little(may be due to window being down)
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  4. #4 Re: Fuel pump whine when engine gets hot 
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    I would guess that you have two separate issues. You need to get the rad replaced ASAP so that you dont do any damage to your motor, if you haven't already. Can you see gas leaking anywhere? Can you get the fuel pump to activate and then look around inside the engine bay and under the vehicle to see if you can see where it is leaking.
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  5. #5 Re: Fuel pump whine when engine gets hot 
    SE Level Member Skeeve's Avatar
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    Yeah im planning on changing the rad in the very near future, as for a gas leak, no i cant see a drip anywhere, would a bod o2 sensor cause the car to run rich?
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  6. #6 Re: Fuel pump whine when engine gets hot 
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    yes, it could. I know when I get on the throttle and I am driving with my windows down the exhaust smell comes into the cabin of the car. Our exhaust doesnt smell awesome when we get on it. But I don't smell gas. You dont have any codes or anything like that do you? No SES light?
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  7. #7 Re: Fuel pump whine when engine gets hot 
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    No SES light, planning on going to autozone to have them scan it anyway just to see, i actually start smelling the gas just after i turn the car on, and continue to all day long
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  8. #8 Re: Fuel pump whine when engine gets hot 
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    I would lean towards a leak if that is the case. Have you parked it on dry pavement and started it and let it run a while to see if it drips anywhere?
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  9. #9 Re: Fuel pump whine when engine gets hot 
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    the only drip i see is the usual water drip from a/c.
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  10. #10 Re: Fuel pump whine when engine gets hot 
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    do you think the smell is just in the air or coming from out of the exhaust?
    98 GTP Coupe- 180* T-stat, GMPP Front Sway Bar, Dual Aeroforce Interceptor's, TDC FWI, TDC Taylor 10.4's, ZZP SS Plog, ZZP 3" SS catted DP, ZZP MPS W/3.4, AL104's gapped @.055, 3800Perf. PCM
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  11. #11 Re: Fuel pump whine when engine gets hot 
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    99% sure its coming from exhaust.
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