Question about 2004 Hyundai Santa Fe

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Generator light and brake light come on when car is idling. It goes off when accelerating. smelled something burning. power drops down to 750 rpm when idling but car does not cut off. hear a slight whirring sound when accelerating. please help

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Sounds liek you have some wiring under the hood that connects to the ignition and the charging system shorting out..GET IT LOOKED AT ASAP before ya have a fire

Posted on Apr 25, 2010

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Posted on Jan 02, 2017

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Idle drops way low with fan,lights,ect..., on@ operating temp195, IAC is good power,no leak, power from computor;yes,under load, lights ect..,what am I overlooking? 91GeoMetro 3 banger


The electrical load on the alternator will pull the engine RPM down. It takes 10 H.P. to run the alternator. The only recourse to low RPM at idle would be to install a larger diameter pulley on the alternator. Extended idle could result in low battery charge rate. Should be fine at hi way speed. The alternator will not put out below 750 Rpm.

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Oil light comes on when braking


Your oil pump is failing.... when your engine rpm drops (when stopping) the pump and engine rpm drop to idle..(light comes on). when you accelerate (rpm's increase) the pumps start working harder and the light goes off.... I am TRULY surprised the dealer(who did you see at the dealer???) did not know this,... THIS IS BASIC STUFF!! ... I mean 090 level mechanics...

Get the oil pump replaced immediately!!!!

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1 Answer

Check engine light flashing, engine bogging down and cutting out on acceleration. Car running great no sign of problems until the sudden lose of power when accelerating. Felt like it was going to cut off...


it could be a lot of things.. but if you smelled something burning then you may have already done damage to your car. id have it towed to a dealer.

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No power, Burning smell, Idles rough, engine light flashes


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