2008 -- Once warm won't rev past 3000rpm

[tmontague]

If it is a misfire due to ignition, you would have a CEL and therefore a code to read. Without it I would guess fuel issue although not common on the yaris

[Faulteh]

Originally Posted by tmontague

If it is a misfire due to ignition, you would have a CEL and therefore a code to read. Without it I would guess fuel issue although not common on the yaris

Is this 100%? I see multiple videos on youtube where people had ignition coil issues and the CEL never came on.

I may just get some plugs, and 1 coil pack, and rotate it through each cylinder. If it doesn't solve the problem, I'm just going to dump it for like 2k. Otherwise, I'll end up spending 100's on labour on a car selling for less than 3k.

Also this only occurs once the car has been driving for like ~10 mins. Does that sound like a fuel pump?

[tmontague]

Originally Posted by Faulteh

Is this 100%? I see multiple videos on youtube where people had ignition coil issues and the CEL never came on.

I may just get some plugs, and 1 coil pack, and rotate it through each cylinder. If it doesn't solve the problem, I'm just going to dump it for like 2k. Otherwise, I'll end up spending 100's on labour on a car selling for less than 3k.

Also this only occurs once the car has been driving for like ~10 mins. Does that sound like a fuel pump?

Well why would you be driving a cold engine harder than 3k rpm? That's likely why it doesn't seem to happen right away. That said, heat from an engine can also make a coil act up when it's on it's way out. How old are the plugs on the car?

And no, of course nothing with cars is going to be 100%, there will always be outliers. But how will a bad coil pack cause a huge misfire to where the car wont even accelerate but somehow doesnt trigger a single cylinder or multiple cylinder misfire code? Typically it will throw a single cylinder code as well as a multiple cylinder misfire code.

Up to you where you want to put the money but it can get expensive throwing parts at it and seeing what sticks. Have you ever actually hooked a scanner up to the car or are you just basing it off of not seeing a CEL? Does the CEL momentarily illuminate when you turn the car on? The catalytic converter is also a potential cause of your issues.

If people tell you to start replacing parts without knowing what is wrong in the first place walk away very slowly...

If you do get it figured out, let us know then issue