Question about 2000 Daewoo Leganza

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Engine problem Idle rpm rises from 1500-3000 and rocks When it is hot from 2500-2000

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  • Daewoo Master
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Check TPS sensor [RPM]

Posted on Nov 28, 2013

Testimonial: "I removed the battery for the engine didnt start for cold wheter below 0 celcius degree and when had charged the battery and put it in the car the idle speed was ok "memory problem" Solution for computer problems unplug the power and plug it again and the problem goes away. :)Thanks Bogdan you opened my eyes for this problem so have it great."

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Posted on Jan 02, 2017

  • 90 Answers

SOURCE: idle rpm

hi
fix it by change the throttle motor because it was have the problem check the result and ask us for more information
with my best wishes

Posted on Jul 15, 2008

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2 Answers

When air conditioner clutch engages it pulls down all vehicle voltage and belt and clutch start to slip


belt worn, loose or idler pulley weak --compressor clutch binding,moisture in system ,compressor internal damage

Jul 19, 2015 | 2000 Jeep Grand Cherokee

2 Answers

High temp low oil pressure light comes on after driving for a few minutes, then off when engine at driving rpm. At stop light (idle or low rpm) light comes back on. Normal driving it goes out.


You need to find out why you have low oil pressure. It is normal that as engine rpm's increase, the oil pressure will rise- the oil pump is moving oil faster. Even though your light goes out, you could still have critically low oil pressure. There should be sufficient pressure at idle to keep the light off. The light will come on when your oil pressure is almost nil- I believe for some it's as low as 8 psi. Normally, oil pressure at idle is specified anywhere from 15 to 40 psi. You would have to check specifications for your Expedition. To verify oil pressure, hook up a mechanical gauge at the oil pressure sending unit on the engine block. Check with a local shop.

The causes run from easy, simple to budget busting ruin. Low oil level, wrong grade oil, real old oil, oil leaks, internal oil leaks, worn oil pump, worn crankshaft bearings. It was pretty common on older very high mileage cars to have a fluttering oil light at stops and idle. It was time for a rebuild, or time to look for another car.

Jul 06, 2015 | 2003 Ford Expedition

1 Answer

LOSS OF POWER WHEN SHIFTING GEARS IDLE AUTOMATICALLY STARTS RISING REALLY HIGH BUT VERY LITTLE POWER


Every time the RPM rise but no power start with vacuum leak. Start the engine and listen for vacuum leak. The car is equipt with air flow sensor and if air buypas the sensor the engine loses power

Apr 19, 2014 | 2003 Hyundai Santa Fe

1 Answer

Low oil pressure


55 is max (pressure relief)
20 is typical hot engine at 800 idle. and rises as RPM rises.
your post tells neither , temp, or RPM

Mar 06, 2014 | 1986 Suzuki Samurai

1 Answer

Engine wont catch


Catch?
cranks fast
starts every time.
idles fine hot or cold , or both? hot idle not too fast.
i race engine , in park and neutral, I can hit 3500 rpm easy, can you.
i release brakes, (brakes are not packed in ICE , are they?)
I select 1gear or reverse (A/T or m/t)
the car moves or dont move, which is it, my guess catch = no move at all.
I try to drive, i look at RPM and MPH
RPM moves up and MPH track.
track means they both move in a linear progression.
RPM rises and for all RPM increases MPH also increases.
does it?
if all that works then we have an engine power issue.
weak on hills?

Jan 03, 2014 | 1998 Jeep Cherokee 4WD

1 Answer

Increase then decrease idle when engine is cold especially


cold engine idle surge. (problem)
RPM range of surge not stated
300-700 or 800 to 1500? (range is critical to diagnosis)

bad fuel
running summer fuel in winter (running old fuel?)
needs a tune up bad, see the list in the operator guide.
idle speed controller,sticking or EGR valve same. (clean them)
location not stated, so cant guess about local air temps.?
no other symptoms, lack of engine power? etc?
was it ok last week, or better, when was the last time it was OK?
1week, 1year?
surge , causes, on a tuned engine might be:
1: too lean. so lean the ISC can not control idle. rpm low, stalling
2: too rich, flooding, stalling, spark plugs foul (look at them)
3: weak compression in 1 or more cylinders.
4: bad spark.
5: air leaks, in the plenum causing , ISC to lose control.
why high RPM?

especially?
well that means it fails hot too.
and there is a simple tests. for hot surge.
is engine fully hot? 180F and holds solid there?
say rpm is about 800
and you turn on head lights, heater fan and (not AC) and defrost.
the RPM must hold or the ISC is failing.
ISC -= idle speed controls. (all EFI has this function)

Oct 28, 2013 | 1996 Honda Prelude

2 Answers

2002 jeep liberty v6 3.7 l , oil light keeps coming on at idle at stop light. had engine flush and oil change and sender pressure unit changed out, but it keeps coming on. could it be a connector into...


Have a reputable garage check the oil pressure with a manual oil pressure gauge. Very well may have worn internal parts, or weak oil pump. Thats the only way to know for sure.

Oct 21, 2011 | 2002 Jeep Liberty

1 Answer

2001 dodge intrepid ...rps suddenly rise when when fans turn on


how much? if a little this is normal computer compensates for the decrees in idle to keep idle at the right rpm. In the cold weather the RPM will increase while in idle for 10 mins to keep the engine at correct operating temp. =If you need more assistance write me, Lee

Jan 07, 2010 | 2001 Dodge Caravan

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