MY CAR DOESN'T IDLE WHEN STARTED IN THE MORNING

2000 Lexus GS 300

Tiny

KHLow2008

February, 16, 2012 AT 3:17 PM

Yes, the throttle motor is responsible for maintaining the idling speed when additional loads such as A/C and headlights are turned on.

Tiny

martinkodua

February, 21, 2012 AT 7:36 PM

Hi so sorry I havent contacted you about my car I haven't had time to do it but hope to do it this weekend and get back to you. Thank you very much for the help.

Tiny

martinkodua

September, 12, 2012 AT 3:48 PM

Hello, its been a long time but I have been able to sort out some of the problems with my car, the transmission has been fixed now Gears change well and I bought a used Throttle body and fixed on my car but I havent seen any improvement with the idling in the morning. Because when I start the car in the morning engines shakes because idling is very low, also I think my car has started consuming fuel. What do you advise please? Thank you

Tiny

KHLow2008

September, 13, 2012 AT 7:30 AM

Did you clean the throttle body before installation. Used throttle body cannot be trusted to work correctly as long storage can cause the IAC spindle valve internally to get stuck.

Have you recheck for trouble codes?

Tiny

martinkodua

September, 13, 2012 AT 10:08 AM

No, I didnt clean the throttle body, I would buy a cleaner today and clean it. When I checked for trouble codes, it came up with my oxygen sensors not working even though I have changed all 4 and also it came up with errors like Cylinder 1 misfire, Cylinder 6 misfire, Cylinder 4 misfire etc. When I clean the codes they go off and come again the next morning mainly because when I start the car in the morning, the engine hunts (hun hun hun hun)till when it heats up then it stops. I would clean the throttle body and get back to you.

Tiny

KHLow2008

September, 13, 2012 AT 6:02 PM

Do you have overheating or coolant losses issues?
Are the symptoms exactly the same as before replacement of the throttle body?

Tiny

martinkodua

September, 13, 2012 AT 6:33 PM

No I dont have overheating or Coolant issues, the symptoms have changed since I changed the throttle body and I have just cleaned it this afternoon. I also have rapid or multiple misfire and also Evaporative Emission system switch/sensor.

Tiny

KHLow2008

September, 13, 2012 AT 6:51 PM

When you have any trouble codes, you must let me know what they are so I can understand what is wrong.

If the valve clearances are too tight, it can cause idling problem so if you have not cheecked them, I would suggest doing so.

Tiny

martinkodua

September, 14, 2012 AT 10:47 AM

The error codes I have are P0120, P0161, P1120, P0300 and P0450.

Tiny

martinkodua

September, 14, 2012 AT 10:55 AM

I erase this codes every day and they still come back

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