Question about 2000 Daewoo Nubira

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Engine runs fast on start up (2000)rpm. when temp rises the engine hunts down and up from 2000rpm. no tick over

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  • Steve Hurc
    Steve Hurc May 11, 2010

    sounds like IAC motor sticky and slow to respond. check for vacuum leaks from hoses on intake manifold and throttle body. check also rocker cover hose to throttle body for blockage as well as port this hose goes to.check throttle body (CLEAN) can you or have you checked for codes? is check engine light on?

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This is normal sometimes when it is cold. However, you should let the engine to run for ~ 2 minutes before you drive away...it will dissappear.

Posted on Aug 30, 2009

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What is causing the fast Idle and slowing down


well gee, there are 50 reasons.
did you scan the PCM yet, if not ,why not?
when the idle surges, that means.
NO RPM ranges stated, if super low rpm check EGR.

1: engine lean and ISC dead, or cant handle the huge engine power drop..The PCM can even make this worse!, buy hunting the ISC to find spec, idle and failing... to...
2: or any of 50 other things causing huge engine power drop and PCM can't maintain idle controls.
super lean burn.(bogging)
super rich burn, misfire for 50 reasons.

i cant hear your engine,nor feel it, or see it shake from gross misfiring.
no can i drive it and see/feel power loss,
can I?
asking net bunny's this (blind as bats)
is "OVER THE TOP" no?
so here , ill toss the dice for you
and guess gross misfiring.
ever get a tuneup this decade, if not bingo , no?

and the others...

http://jeepdied.com/Misfire101.html

link even has the 50 cause list, to show the futility of guessing!
we do 1 to 10 tests. and find it.
for sure.

as you can see EFI systems are complex.
gue$$ is not only expensive but can net you 2 problems easy.

Feb 05, 2016 | 2002 Jeep Grand Cherokee

1 Answer

Toyota corolla hatch 2002 idle at 2000 rpm when


All the above is normal , except 2000rpm is a little high at idle . can be adjusted down to 1500rpm. the computer adjusts the engine speed . in drive the transmission loads up the engine idle drops to 1000rpm . in park engine unloaded rpm increase all normal.

Sep 17, 2014 | Cars & Trucks

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

Car will not move


ok,
got a RPM tachometer in dash?
yes?
1: does rpm rise fast with right foot and no go? yes= bad tranny
this is called bad transmission (gross slippage)
2: does RPM rise just small bit ? and car wont go
yes, that means the engine is weak.

answer that. its the 1st step all mech do.
slipping A/T
or weak engine, (or brakes stuck on)

Nov 23, 2013 | 2000 Acura TL

1 Answer

1996 olds aurora runs hot when idling or low speed normal at fast speed what could the problem be


If you have a viscous fan hub The one where the fan spins free on the water pump then the symptom you describe is a result of it not working any more. With the engine cold start the engine and run at around 2000rpm If the fan is working properly you will hear the air noise from the fan for a few seconds then the noise will dissapear as the fan slows down. When the engine is hot viscous fluid ( silicon ) is pumped from one side in the fan hub to the other creating drag which makes the fan spin and draw air through the radiator. If this is not happening then the fan is stalled by the load of trying to move air and as such the temp rises. As you move off the air flows through the radiator and the fan becomes useless until you stop again. Noemal fix is a new viscous hub. If you have electric fans check that they are working as planned

Jan 11, 2013 | 1996 Oldsmobile Aurora

1 Answer

1998 Honda civic rising and falling idle


the timing could be off you may have to have it checked and fixed hope this helps

Dec 23, 2012 | 1998 Honda Civic

1 Answer

2000 Buick LeSabre Engine dies suddenly after car sits overnight and driven normally on first trip of the day in the morning. Engine temp. gauge rises to 162-164, then stops rising. It is then or shortly...


Hi! The MAF (mass air flow) sensor is surely faulty. The MAF has big contribution on the engine performance specially on the idling an vacuum supply. If the MAF is faulty the rpm will drop eratically or die. Regarding the overheating problem, you may want to check the radiator blower for it may be tripping that sometimes it works and sometimes won't. This can be a good cause. Hope this helps and thank you for using FixYa!

Sep 23, 2010 | Buick LeSabre Cars & Trucks

1 Answer

Won't start, engine wont rev above 2000rpm


Have the alternator tested. You are providing a low charge to the battery when you jump it and when taking it above 2K RPM requires more amperage resulting in the engine dying and the rough idle

Apr 23, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Idles up and down after warm up


THE COOLANT LEVEL IS LOW

on the older hondas even the newer ones idle speed is coolant temp controlled.

when the engine idles up the electronic coolant temp sensor is submerged in coolant and reads warm, so the engine computer idles the car down. the coolant level if low than drops from around the coolant temp sensor and it says the engine is cold, so the engine computer idles the car up.

which results in the constant rise and fall in engine rpm.

ADD COOLANT TO THE RADIATOR AND WATCH THE CAR MAGICALLY FIX ITSELF.

Apr 10, 2009 | 1993 Honda Accord

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