Fluctuating revs

Hi,

Has the check engine light ever come on when this happens? If so, you should have the computer scanned. Most parts stores will do it free of charge. If it hasn't, I would start by checking fuel pressure to make sure the pump is performing properly. Here is a link that shows how it is done:

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

Let me know if you have questions.

Joe

Hello,

This sounds like it could be a vacuum leak. here are two guides to help us see what's going on:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

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

Please run down these guides and report back.