My 2003 Fiesta Zetec sometimes makes a rattling noise when accelerating. Oddly, it only does it in one particular place each day, after it's been running for about 2 or 3 minutes. There's a stretch of road a few minutes into my homeward journey that is slightly uphill, and as I accelerate up it in 3rd, the engine starts rattling. It doesn't stop me accelerating, though. After that, I don't hear it any more, so it might be temperature-related. I was wondering if I might use cooler plugs to see if that shuts it up, but don't really want to waste money if it's not going to make any difference. But does it make sense to even try this approach in the first place? Would cooler plugs actually make a noticeable difference if it /was/ pinking? And isn't there a knock sensor that's supposed to prevent this?
- posted
8 years ago