Sea Foam for misfire and jerking Chevy Trailblazer [SOLVED]

Thanks for the question, Benjamin.

First, you can absolutely use Sea Foam Motor Treatment in your Chevy’s gas tank. I’d recommend Sea Foam High Mileage (it’s a strong cleaner and formulated to help older vehicles run better).

Second, it’s definitely worth a shot depending on what’s causing the misfires/jerking. Here are a few thoughts about misfires:

First thing to evaluate is whether you have a faulty spark plug (or plugs), faulty plug wires, and/or faulty ignition coil. A misfire can also be caused poor fuel delivery, in which case Sea Foam might help.

I’d start with this:

1. Add a can or two of Sea Foam High Mileage to a low tank of fuel (1/4 or less) and drive at least 20 miles.
2. If that doesn’t help, run back to back Sea Foam Spray treatments through the intake. This is a great thing to do for any engine. Here’s a video that covers everything you need to know. (Also, I’d use a full can of Sea Foam High Mileage instead of Sea Foam Motor Treatment).

https://www.youtube.com/watch?v=LkeAlK9FzkI

Hope that makes sense – let us know what happens and if you have any other questions, happy to help!