RPM in 2007 SE Camry V4 goes up or down.

Asked by Oct 05, 2015 at 02:40 AM about the 2007 Toyota Camry

Question type: Maintenance & Repair

While driving my car,  the rpm can drop or rise sharply and fast between 500-1000 rpm so it could be on 2000rpm and directly drop to 1000rpm even when i'm at a constant speed and on a straight road with 0 incline.

It used to go up and down very frequently (every couple of seconds) even when i'm parked, but then I changed the air filter and that problem was gone.
Still I have the current problem I mentioned at first though.

Please help, I think this issue is causing my camry to have a lower mileage than usual.

7 Answers


I would first buy some throttle body cleaner and thoroughly spray down the inside. If you're handy around a car, I would remove the throttle body and tear it down and clean it. But if not, spraying the inside will help. Secondly, I would then remove the Idle Air Control valve and clean that as well. Sometimes just spraying it down will cure the issue. Here is a short video...........https://www.youtube.com/watch?v=i82s4ZfR2js Here is a video of a more detailed IAC cleaning...........................https://www.youtube.com/watch?v=WsP2-HKz7vE If after cleaning these components and you still have the surging idle, you may have a faulty MAP sensor. That gives you a surging engine and poor performance. If you have the check engine light illuminated, I would have the error codes checked first. Try your local Autozone.

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The thing is that before changing the air filter, the check engine light was on, but now there is nothing illuminated and nothing shows on the scanner at the mechanic.


I would try the cleaning spray first. That's the most inexpensive fix. It could be that simple. May be why it's not throwing a code. Just dirty. Not defective. How many miles are on your plugs? Have you done a tune up lately?

1 of 1 people found this helpful.

Thank you so much Reelin68! I will try the cleaning spray and get back to you:)

I'm not clear as to what this issue is. Are you indicating that this vehicle has a surging problem?(Engine runs erratically)...or...is your tachometer indicating false readings?

Hi Lastchancegarage, no its not just a tachometer false reading, its a surging problem... I haven't got the chance yet to try and spray clean the throttle body and idle air control.


Hi. I have a 2007 Toyota Camry and the problem I have is that when I turn the a/c on the Rpms go down and the Ac fans won't stay on and it blows hot air inside the vehicle.

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