Question about Hyundai Motor 2002 Sonata

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Loss of power on acelaration

Replaced Sparkplugs,plugwires,ignition coils

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  • oolappdog86 Jun 03, 2009

    post a solution

  • oolappdog86 Jun 04, 2009

    That's a start any other ideals out there ?

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There's a lot on any car that can cause loss in power.
A few of them are:
Mass air Flow sensor
Bad O2 sensors
Old oil or sludged oil
Bad Gas
Clogged catalytic converter
Loss of cylinder pressure or compression

I would start with the cheapest tests/fixes first
oil: if you haven't already and don't know the condition of your oil, change it. If your oil has sludge in it then you could have a leacking head gasket.

Next up, If your gas is bad fill the tank about half way and use lucus oil octane booster, and for a second half a tank pour in some seafoam engine cleaner. It will clean your fueling system, injectors, and pistons/chambers.

If those too don't help: get a compression test on the cylinders. Not expensive to have done, but could be expensive to fix if there is something wrong or the compression is leaking.

Next, go to a muffler shop and have your catalytic converter checked. A clogged or bad Catalytic converter may trap exhaust and keep it from exiting your exhaust system.
While your there you can have your O2 sensors checked.

If all of that is fine, replace the O2 sensors and the Mass air flow sensor. These components control the air fuel ratio. If they are going out your engine won't ever get the right amounts of gas and air to run properly.

It's a lot, but my general rule of thumb for trouble shooting any issue with a car is to start with the cheapest fix and work your way up.


Posted on Jun 03, 2009

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Check air filter , fuel filter, fuel pump, catalitic converter

Posted on Jun 03, 2009

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