Loss of power to the throttle?

Hi,

Wow, you have already done a lot. Have any of the things you've done made a difference? Also, when it shuts off, does it restart right away, or do you have to wait?

Anytime there is a loss of power, as described, I think of a plugged or partially plugged catalytic converter. Have you noticed any rattling from under the vehicle or strange sounds or odors from the exhaust? Take a look at this link and let me know if you feel anything mirrors what you experience:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

As far as the fuel pump is concerned, before I would go to the trouble of replacing it and the filter, I would recommend checking fuel pressure.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

You will need a fuel pressure gauge to do this, but if you don't have one, most parts stores will lend one to you. Also, I attached the manufacturer's fuel pressure specifications below.

Let me know.

Take care,

Joe

See pic below.

Could it possibly be something with the key fob like a drained battery in the key itself?

Hi,

If the key fob was damaged, it wouldn't start. It would set the immobilizer and prevent it from starting.

I went over your first post again. The idea that the engine RPMs won't go higher than 4K is interesting. When you reach that point, does it feel like a rev limiter has been reached or does it just won't go higher? I'm wondering if there is a timing issue.

Let me know.

joe