2001 Camry random stalling.

[Geology Rocks]

Hello, my mom has a 2001 Camry four banger and the auto trans it has almost 100,000 miles. Every once and awhile, maybe every 3 weeks or so, when driving and only while driving itll start running really rough like its getting too much fuel or a its dropping a cyclinder. If you catch it doing this and rev the car till around 3-4 grand itll stop, if not it will stall out and take a few minutes to restart. It isnt throwing a CEL. Anyone have any ideas what it could be?

[mr magoo]

I have a 96 camry 4cyl auto with 188K. I get this rich stalling condition intermittantly also. I have narrowed the stalling down to after a long highway ride. The car is fine for under 20 minute trips in any conditions. Once the car threw an EGR code. (1) I had a shop do a 3 part liquid cleaner and the code has never returned, but the condition remains. (2) I had another shop diagnose a crack in a spark plug porcelyn, but the condition remains. I understand that the ERG and tube ((1) above) is a $600 job. Too much to go for just a guess. I will continue to drive this until we can narrow down the precise symptoms and cause. Please feel free to opine. The car runs and drives very well otherwise.

[marc780]

Tough but all i can guess is it must be heat related? Maybe the coolant sensor has dirt contacts...weird it wont give a code, so maybe it is a mechanical flaw. I would guess distributor but your car doesnt have one -