Question about 2005 Kia Sorento

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2.5 diesel engine revs slow to drop when gas pedal realeased

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Check for any throttle binding. Does it snap back quickly, it should. Check for any vacuum dampers holding the throttle open. This might be because of malfunctioning control circuits to hold the throttle open for air conditioning for instance.

Good Luck

Posted on Mar 17, 2009

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2008 sprinter 2500, every time i start to drive I have no power for about 5 to 8 seconds nothing happening then slowly it starts to rev up engine and start to drive then its fine , there r no codes


Check the engine in neutral/park and depress gas and confirm engine is slow to rev up. If the engine revs in gear and little or no movement have the transmission checked.

this car is likely a drive by wire.(no cable between gas pedal and throttle actuator motor) Some one needs to observe the throttle to see if it advances when the gas is depressed.

The simplest analysis would be the connection to the engine computer with not a simple scan tool but a Chrysler proprietary analyzer to see the interaction of throttle position and engine RPM

Hope this helps?

Jul 06, 2016 | 2008 Dodge Sprinter

1 Answer

Is it normal for the revs to stay up when changing gear in a 2002 4x4 3.0L turbo diesel navara?


do they revs drop off when taking pressure off accelerator pedal when out of gear? if only staying high during gear change it would suggest a worn clutch friction/pressure plate so the engine isn't slowing down when clutch is depressed .I'd also have the OBD codes read to see if there is a sensor/switch at fault , but sounds like the clutch to me

Jun 21, 2014 | Nissan Navara Cars & Trucks

1 Answer

What makes a 1995 Turbo Diesel GMC Yukon accelerates on it own?


There should be a control unit on top of the engine that controls this to keep the engine at a certain temp which runs off the engine block temp sensore. I would try changing the sensors first located on the drivers side front of cylinder head and in the goose neck on top for one of the thermostats.It wouldn't be a bade idea to change the thermostats too at the same time.

Apr 30, 2014 | GMC Yukon Cars & Trucks

1 Answer

I have a 99 gmc jimmy Ive notice while i slow down for a turn my car is still trying to accelerate and only when I come to a full stop it goes back to normal Also when first starting the car it revs up to...


Vacuum leak from brake booster. If you hear a sucking noise when you press the brake pedal replace it. Another way to check it is to place truck in gear set e-brake press brake pedal repeatedly and see if idle goes up and down. DO NOT PRESS GAS PEDAL DURING TEST.

Feb 01, 2014 | Cars & Trucks

1 Answer

Engine starts and idles fine, but will not rev up (2001 Jeep Grand Cherokee 3.1 diesel auto)


If it was a fuel shortage the engine would rev but to limited speed. This is a lack of air to throttle body. Check for clogged air filter and all the piping and the throttle body.

Sep 28, 2012 | 2001 Jeep Grand Cherokee

1 Answer

Saab 1.8 diesel 2007 the problem iam


the car will maintain 850/900 revs in all gears on the flat and only decelerate when the engine is reving over 1500.its called auto idling valve.....(computer controlled..)

Apr 12, 2010 | 2008 Saab 9-3

1 Answer

Vw polo maintains engine revs when foot is off the accelerator.


You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.

Feb 11, 2010 | 2007 Volkswagen Golf

1 Answer

1985 Nissan 300zx will crank, run, and diesel until it dies


YOUR problem is you have water in the engine as that is the only thing you can get apart from brake fluid that can cause white smoke OR steam out the exhaust or white steam out of the breather so check the dip stick it should have water beeds on with the oil or if you take off the filler cap it will have white oil on it,, so then drain sump and fit new filter and refill with 20W 50 and away you go..Have a goodday Ron

Oct 20, 2009 | 1985 Nissan 300ZX

1 Answer

Engine over-run between gears


This is a very common problem for ford. I have the same thing every day. It is the computer not reading the temp. When it does that just tap the gas pedal.

Jul 19, 2009 | 1992 Ford Escort 4 Door

1 Answer

Car running problem


Ok Slow deceleration rev responce was part of the ECU software to keep the emissions down ,however if this has only just started you can try to reset the IAC valve ,the procedure is as follows.

Turn ignition key on ,unplug the IAC valve ,turn the key off ,replug the IAC valve. do this 3-4 times .Then start the engine while holding the gas pedal to 2000 rpm ,then slowley let the go of the gas pedal till the engine idles .

The IAC valve is located on the throtle body and has 4 wires to it.

Sometimes the throtle body needs to be cleaned and then reset.

Jan 02, 2009 | 1999 Daewoo Lanos

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