Question about Hyundai Sonata

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No power accelerating and shaking bad

My 1998 Hyundai sonata idling is between 600 to 900 rpm, but problem is when i drive there is no power and is shaking. solution please

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  • 95 Answers

Scan test for misfire code/s than move spark plug and wire to other cylinders, clear and recheck misfire info, if it moved than replace plugs or wires, if it didnt change, check ignition coil for output, if ok , than check compression, if ok , than check injector circuit with noid light, and measure injector impedence, if ok back pressure test exhaust for plugged cat.

Posted on Jul 08, 2014

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Posted on Jan 02, 2017

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1 Answer

I have a 2004 hyundai sonata. the engine shakes when it starts but smooths out after a minute, but when accelerating it takes forever. and has no power


Possible dirty EGR valve, or bad ignition module. Could also be many other things, coolant temp sensor, bad cat converter, clogged muffler, etc.

Jan 21, 2015 | Hyundai Motor 2004 Sonata

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98 hyundai sonata, losses idle when shifted into drive


You had alot apart to do your work, and I suspect the IAC motor has dirty passages, or EGR does.

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The engine stop when I acelerate it


Carefully check the air inlet tube (TOP AND BOTTOM) for hairline crack.

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check your oil level may be high.

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I have a 2000 Hyundai sonata 2.4L 4 cyl.. When I run it on the highway for say about 20-25 minutes, when I get off and come to a stop the RPM's drop to 4 or 5 hundred and the car shakes/sputter hard from a...


it sound like a sensor is bad...maybe the mass air flow??? I would send the car to someone that can scan the car on a road test...that would find the bad sensor

Oct 30, 2009 | 2000 Hyundai Sonata

1 Answer

Lately 1995 sonata shakes at idle very badly and especially in reverse, sometimes shakes so much it stalls please help.


Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.

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Hyundai Sonata 2002 idle at high RPM and accelerate 40-45 MPH


Look for a vacuum leak somewhere. This is the most common problem for a high idle.

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When i turn the ignition on the engine start o,k.,the rpm is o'k but when i drive the cars the rpm stick on 3000 rpm can evetone tell me whats can i do


The rev counter could be faulty.
I hope the engine is responding ok on accelaration inspite of the rev counter being stuck on 3000rpm , if so thn its definately the rev counter being faulty.

May 09, 2009 | 1999 Hyundai Sonata

1 Answer

Rpm's jumping


time to replace the idle control valve.

Feb 15, 2009 | Hyundai Motor 2002 Sonata

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