Question about 1997 Kia Sephia

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I HAVE A97 KIA SEPHIA2,1500 CC ENGINE.THE PROBLEM IS FLUCTUATION OF RPM AND THE RPM IN NORMAL IS LOW, THERE IS NO INDUCTION ON THE COMPUTER CHECK?

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Change the fuel filter and air filter, if situation persists get your fuel system checked.

Posted on Sep 08, 2010

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Rpm problems with no check engine light on


If the RPM is high check for a vacuum leak. Examine all vacuum hoses for cracking or disconnections. If no problem is found, spray carburetor cleaner on the intake manifold and any other gasketed areas on the top of the engine. If, when spraying, the engine RPM fluctuates, then suspect a gasket leak where the spray is entering the engine. Also check throttle body for sticking. Clean it with carburetor cleaner.

Low RPM could indicate a clogged fuel filter, low gas, dirty or bad fuel injectors. If engine idle is low because it is running poorly (e.g., a misfire), check engine for misfire. Misfires can be caused by bad spark plugs, bad spark plug wires, bad fuel injectors, a bad coil pack, low compression in a cylinder, etc. Check the obvious cheapest things first.

If RPM is varying up and down, check Idle Air Control Valve (IACV) for sticking or obstructions. You may need professional help at this point.

Feb 05, 2014 | 1996 Ford Mustang

1 Answer

I changed the engine oil, filter and spark plugs in my 1999 Volvo 940 (1996 cc). Upon starting up, the engine runs at lower rpm and "hiccups" at idling.


Engine stalls or RPM fluctuates at idle up and down.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control


Oct 15, 2012 | Cars & Trucks

1 Answer

I have problem when i start car after some speed automatic transmition rpm goes to higher then normal for exmpal car running speed 80km and transmition rpm 2000 and suddenly Trnasmition rpm 3000 at same...


It is not holding in overdrive.

It might be a throttle position sensor is dirty and sending information to the computer to downshift. It could also be a vacuum leak somewhere in the engine induction. If it has not been tuned up recently, start there.

It might not hurt to check with a dealership to see if there are technical Service Bulletins issued for what you are experiencing.

The transmission filter should be changed if it has not been changed in 75000 Km. and the pan checked for excessive debris which might indicate to look forther at the transmission if that does not clear it up.

Dec 22, 2011 | 2002 Kia Optima

1 Answer

The engine rpm's fluctuate both while driving or


just happened to my 05 Kia Optima. It needed a new coil pack.

Jul 23, 2011 | 2005 Kia Optima

1 Answer

Engine rpm fluctuate when a/c is on/this problem has been for a while now some tech had played whit the adjustment screw and had the engine idle high 1200 rpm to counter act the fluctuation / now back to...


I am not familiar with this engine. But, if the alternator, PAS and AC are being driven by the same belt, then its possible that the belt is too slack, have you checked the belt tension ? That would be my first step. Hope that helps

Feb 02, 2010 | 1998 Kia Sephia

1 Answer

I have a Kia Sportage 2006 Lx 2.7l sometimes when try to park thr engine turns off , but when I restart the engine ITS running normally. I note that the rpm fluctuate sometimes.


basicaly you need to check your engine performace is it newly chance oil and tune-up???
when making a reverse your engine gets the load but if your rpm is flactuating the engine will stalled so make sure the engine is in good conditon.

Oct 03, 2009 | 2006 Kia Sportage

1 Answer

Describe your 1997 Jeep Wrangler 1997 jeep wrangler 4 cyl idle fluctuates 900 rpm to 400 rpm after warmup no service engine light but check guages light comes on momentarily when rpm gets low and oil press...


The check gauges light is normal because at 400 rpm it isn't running fast enough to build sufficient oil pressure. I am guessing maybe a vaccum leak???

Jul 10, 2009 | 1997 Jeep Wrangler

1 Answer

Suzuki Baleno (esteem) 1999. Engine Idle RPM not stable


you probably need to check the butterfly. its the compinent that controls how much air goes into the engine if it is weared than in idle state air leaks into the engine sometime more sometimes less and cause fluctuations in rpm

secondly there is a rpm switch which controls the rpm you can replace that switch and check

May 18, 2009 | 1999 Suzuki Esteem

1 Answer

2004 GMC Sierra Heater does not heat on low RPM


check your coolant level on the radiator

Feb 03, 2009 | 2000 GMC New Sierra 1500

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