loss of power, cylinders two and four are not firing?

The fact that it runs okay when full of gas says fuel pump, here are the instructions on how to change it out in the diagrams below. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Hi,

If the fuel pressure was the issue, it wouldn't only affect cylinders 2 and 4. When was the last time the vehicle was tuned up? Have you removed the affected spark plugs to inspect them?

As far as a misfire, it can be caused by several things. However, the idea that you have two at the same time reduces that. Have you checked to see if there are any vacuum leaks? If not, start with that.

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

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, I need to know if the two happened at the same time or is this an ongoing issue?

If possible, remove the spark plugs from cylinders 2 and 4 and check them. If possible, take a pic of them and upload them for me to see.

Let me know.

Joe