Rpm hunts, randomly

40

Asked by GuruWFRZZ May 27, 2018 at 12:29 PM about the 1997 Toyota Camry LE

Question type: Maintenance & Repair

Yesterday I was coming home and while in heavy traffic, "stop and go", my
1997 Camry, four 2.2, began fluctuating rpm at a top sign. Before this
happened I noticed a strange odor in the car, wasn't gas or other fluids, more
like eggs.

4 Answers

9,475

The smell is your catalytic converter the fluctuation of the idling is more likely your O2 sensors.

101,345

Wouldn't hurt to clean the IAC, but the smell of rotten eggs is related to the catalytic converter, if it's plugged up exhaust is going to be restricted. But by all means clean the IAC, the throttle body, and look for any vacuum leaks, unmetered air entering the engine can cause a hunting idle RPM. One way to find vacuum leaks is to spritz a tiny amount of starting fluid around the throttle body and hoses with the engine running, if the engine surges then you found a leak.

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