At cold start the car makes clicking sound,lights flicker,idles to normal.When I turn on the heat,the car idles down or even shuts off.A/C has to be off for idle to be normal with heat on.

SOURCE: HIGH IDLE NOISE DURING COLD START

Its sounds to me like the batteries, check them.

SOURCE: Oil pressure light on at idle

Don't delay on this. Take the vehicle in and have the oil pressure sensor checked. It could be just the sensor or it could be something more serious. A drop in oil pressure could lead to catastrophic engine failure.

don

SOURCE: car keep shutting down

SOUNDS LIKE THE IDLE AIR VALVE IS CARBONED UP TRY SPRAYING CARBURETOR CLEANER INTO AIR INTAKE AT THE THRUTTLE BODY WHILE HOLDING IDLE SPEED AROUND 1500 TO 1900 RPMS USUALLY AFTER SPRAYING FOR SEVERAL MINUTES ABOUT HALF A CAN THE PROBLEM WILL BE FIXED ...IF THIS DOES NO GOOD YOU MAY HAVE TO TAKE IT TO THE DEALER TO HAVE THE IDLE SPEED REPROGRAMED IN THE ECM WITH THE DEALERS DIAGNOSTIC SCAN TOOL....USUALLY FOR AROUND 50 TO 60 BUCKS HOPE THIS HELPS

SOURCE: Heater blows cold air unless accelerating

1.maybe your thermostat is no opening or closing.
2. not enough Ant-Freeze
3. Low on water

With more details on the engine i may be able to help you more. for example what is the temp reading after it idles awhile or does it blow warmewr when driving ?

Mike Butler

• 6674 Answers
• Posted on Jan 16, 2009

SOURCE: irratic idle at startup

No check engine light? You have a couple of sensors that may be causing that, coolant temperature, incoming air temperature sensor to name 2 of them. Personally I'd have it put on a scan tool & remove the guess work. Some parts places will do it for free, well as long as you buy the parts there.