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Why does my 2005 Kia sportage diesel 2.0, idle very slowly (300rpm) and will not respond to the accelerator, after starting when engine is warm. After several seconds the RPM increases to where it should be (600rpm) and runs as normal. this does not happen when engine is cold! What could be causing his problem?

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Tried all suggested fixes to no avail, took it down to service centre to have a diagnostic check, and appears brake light switch is faulty??
The switch also controls cruise control and cuts the acceleration so your cannot drive with foot on the brake and rev at same time.
so faulty brake switch was sending faulty message to CPU and stopping engine from accelerating after start. So there we have it, computer controlled cars.... Thx to all suggestions.

Posted on May 08, 2014

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  • 124 Answers

Check fuel pump and its timing

Posted on May 08, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: stalls and wont idle when cold

Re the trooper. You have a couple of possibles. The most likely is the glowplugs or glowplug relay. Don't be fooled into thinking glow plugs only heat to start - the also do whats called postheat. That is to raise the cylinder temp until the block is warm. IF they are not functioning (clip a light onto one whilst switching the glowplug on to test the relay) this is common.
Most likely is a stuck EGR valve - stuck open so running a very lean mix when cold. Its two bolts on the inlet manifold, pulls out and looks covered in soot - it should push in and spring out. Can be cleaned in petrol or alcohol or with compressed air.
More remote is possible you have a faulty injector...only really testable by an engine centre...

Posted on Jan 26, 2009

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SOURCE: idle problem

Try to disconnect the Air Flow Meter. It is the first plug just before the air filter/air intake box. If this improves your situation you will need to source a new or aftermarket Air Flow Meter.

Posted on Apr 28, 2009

gh20s
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SOURCE: The oil pressure gauge in my 2002 Duramax Diesel

That is normal. As you accelerate and rpm's increase the oil pump rpm increases. I think the oil pump runs 1 to 1 or 2 to 1 with the crankshaft rpm. Check the oil and inspect for any visual leaks if the gauge does not operate like that consistently. If it is intermittent or it just started acting that way, the sender my be bad. Other than that any Chevy Dealer will say that is normal.

Posted on Jun 01, 2010

alicantecoli
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SOURCE: Engine idle problem. Range Rover 4.6 HSE 1998 Have

sorry but you have tried everything i would have done except that i would have checked the engine breather pipes for deterioation like perished or soft and collapsing .you would be surprised how often this is the main cause of this sort of problem

Posted on Aug 21, 2010

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SOURCE: 2005 toyota corolla low idle

idle air control valve can be removed and cleaned

Posted on Sep 05, 2010

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