My Car Dies At Idle
Reader Question: Hi Austin, We have a 1998 Toyota Camry, 4 Cyl, automatic. The other
day when my wife parked it at a friends house, it would start fine but
would not idle at all once you took your foot off the gas pedal to apply
the brake and move the shift lever.
I drove to pick her up expecting to
have it towed. I decided to see if I could keep it running and still get
it into gear so we could get it to our mechanic without a tow. I pressed
the brake with my left foot while keeping the engine running with my right
and was able to get it into gear and moving. After that it started to
idle fine and has been starting up and running perfectly since.
Do you
know what may have caused that so we can prevent it from occuring again?
Pretty scary for my wife who has to park at out of the way places with her
job sometimes. A friend that owns a body shop says that the same thing
happens when they have a car with a run down battery but our battery
appears to be fully charged.
Thanks,
Tony
Hey there Tony
If you came to my shop I would check two things.
First, Inspect and clean your Throttle Body. The throttle body is basically where the carburetor used to be on older cars. The fresh air intake duct from the air cleaner box attaches to the throttle body, and if you remove the fresh air duct you will see a metal vain just inside. This vain opens and closes as you push on the gas pedal allowing more or less fresh air to enter the engine.
Over time this vain will become dirty/gunky and will stick causing dying at idle problems, slow to start problems and rough or erratic idle speed problems.
You can take a rag and a toothbrush with some intake cleaner spray found at your local auto parts store and clean the throttle body and the vain of dirt. This simple procedure should be done periodically as part of general maintenance anyway and can usually be performed by any mechanic or fast lube place.
Here is more info and a picture of the throttle body
Second, I would also make sure you do not have a vacuum leak somewhere under the hood. With the engine running and the hood up listen for a hissing vacuum leak noise under the hood. I have seen that fresh air duct hose I mentioned get a small hole in it on the underside of the hose where it is not visible.
This crack in the hose will cause a vacuum leak and will cause the engine to die. Run your hands under the hose (or remove the hose if you feel capable) and inspect for a vacuum leak or crack.
Keep me posted will ya?
Blessings,
Austin Davis
The Honest Mechanic
Car dies at idle speed
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