2007 Camry SE

[Ecky]

One easy test would be to swap the injectors between cylinders and see if the issue follows the injector.

[Taylor95]

Originally Posted by Ecky

One easy test would be to swap the injectors between cylinders and see if the issue follows the injector.

That's pretty smart. I'll do that if the injectors are easy to get to.

[iikhod]

One quick test is to start the car, then put earmuffs on, then get a long stick/something similar and hold one end on the muffs, the other end against the injector.
Working injector makes clicking/ticking sounds and a faulty injector is silent.
Obviously this works only if one injector is completely dead.
With this method you don't have to spill any gas.

[Tahoe_Hybrid]

If you have a VVT-i engine I suggest getting 93 Octane fuel you will gain quite a bit of MPG that is how i'm able to pull 27-31.5 on the highway I use 91 octane Top Tier Chevron/Texaco Mobil/Exxon is great also

$2.899/18.5MPG(city or highway)
$0.156 per mile

$3.199/ 27.5 MPG(i seem to be able to get that a lot on the highway)
= $0.116 per mile

3.199 /22.5MPG city (i seem to be able to get that a lot in the city)
=$0.142 per mile


just becareful some shops will charge the 93octane price but dispense 87 octane

[Ecky]

The 2AZ-FE engine in that Camry has only a 9.6:1 compression ratio, which is pretty low. It shouldn't be anywhere near knock limited even on 87 octane.

The hybrid version of the engine has a 12.5:1 compression ratio which could easily benefit from higher octane fuel if that were the end of the story, but I'm nearly certain it doesn't have ignition timing tables for higher octane fuel, and those improvements would really only apply at wide open throttle anyway. Instead the hybrid runs the Atkinson cycle to reduce the dynamic cylinder pressure, which again makes low octane fuel perfectly fine to run.

91 should not be called "supreme" or "ultra" as it does absolutely nothing in engines not designed specifically to run on them, and those engines typically don't run at all on lower octane fuels.