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Idling up and down specially in the morning - 1994 Opel Astra

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4.3 V-6 chev. no power


check your fuel pressure, and fuel regulator ,sounds like your fuel pump is on it's way out ,specially if you have over 100k mile

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My car will start and idle fine sometime and sometime it dies and dies when put in gear


Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

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. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

Nov 06, 2012 | 1986 Ford Mustang

1 Answer

Immediately after I start my '07 Corolla the idle speed is around at 1,400-1,600. This generally happens in the morning or after work. When that happens if I I let it idle for five minutes it goes down...


This idle condition is normal for a cold start, the computer is controlling the idle for proper fuel burn. It is not necessary to wait five minutes for the idle to come down. Allow about one minute before putting into gear and driving.

Nov 04, 2010 | 2007 Toyota Corolla

1 Answer

Hey when i start my car every morning my car idle going from 1500 to 2000 up and down after for like for 5 to 10 min or when the car warm it stop and goes back to normal and my check engine light it on can...


TO WHOM IT MAY CONCERN:
My car will not idle properly until after it is warmed up.(1995 Olds. Cutlass Supreme 3.4)
It wants to idle up and down between 1000 and and 2000 and will stall out if I don't keep it revved up at 2000 until it warms up.
Thank you and have a great day.
Betty

May 20, 2010 | Cars & Trucks

1 Answer

Idle air notfunctioning Rough idle in mornings idles up then down pulsing idle 2003 Jeep laredo .


check for vacuum leaks and make sure throtlebody plate is clean, use throtlebody cleaner and an old tooth brush to clean, if problem is still there then replace the valve (idle air control valve ).

Jan 10, 2010 | 2003 Jeep Grand Cherokee

1 Answer

Rough start


try the plug and wire
then try the cap and rotor

Feb 05, 2009 | 1999 Pontiac Grand Am GT

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