Borden23

Efi. I do some maintenance, but not much and am trying to learn. We had this problem with our dolphin and it was the catalytic, but that doesn't seem too be the problem with our Granville. ill check all that out thank you! Any other tips?

Was just curious why it won't go over 55 mph. It's a 4-cylinder engine. What would be the common problems that make it not able too go over 55 mph? Any help would be greatly appreciated!! Thank you!