Hope someone can help. My son has an intermittent idling problem with his 92 Camry (4-cyl). Most of the time, the car idles perfectly. But every now and then the idle drops to where the car almost stalls. I was just under the hood looking for a vacuum leak, the car was almost stalling, when suddenly it went back to a smooth idle. I've changed the plugs, air filter, and fuel filter. Can't find any loose or broken vacuum hoses.

Any ideas?

Hope someone can help. My son has an intermittent idling problem with his 92 Camry (4-cyl). Most of the time, the car idles perfectly. But every now and then the idle drops to where the car almost stalls. I was just under the hood looking for a vacuum leak, the car was almost stalling, when suddenly it went back to a smooth idle. I've changed the plugs, air filter, and fuel filter. Can't find any loose or broken vacuum hoses.

Any ideas?
Sounds like it could be a sticking idle air control valve. It tends to get gummed up after awile. If it is sticking it can be cleaned instead of replaced. Search the forum for IAC Cleaning. It's been discussed many times. Good luck.

Regards,
JOET/CAMRY

I would suspect your EGR valve. Check all the pipe/hose connected to it. They might get clogged by carbon deposit.