Quote:
Originally Posted by calflan
I have whistle and believe it to be normal. On aircraft fuel boost pumps you hear the same thing at times. I believe this is an electric fuel pump building pressure and once the pressure is maintained, the pump goes back to standby mode. Usually an engine will draw fuel pressure after it gets running a bit, so the pump is likley building the precharge and then shutting down or going to a lesser mode of operation. I'd bet the injector system demand is the reason for this. 
On start, at least residual fuel pressure (usually after the car has sat a bit and bled off pressure) fuel pressure needs to be built up fast, thus the highest load on teh pump. I don't see this as a problem at all and believe it to be normal. I'd bet it's just that some pumps are quieter than others, but I'd also bet when you don't hear that (if you do now) you'll likley have a problem - like failed pump.
There are several here with same issue and my car has yet to burp at all, runs like a dream. I LOVE IT !!!! 
1250 miles and I've yet to get on it yet. Waiting till after oil change at 1500. Going Mobil 1. Enjoy these beauties all !  |
Yeah, this sounds pretty reasonable, about what I'd expect to hear from the dealer if I ever brought it in to ask about it. But I'm not nearly worried enough to do that. Haven't had any problems with her so far, right around 2200 miles now. Did auto-cross with her yesterday (so awesome!), ran like a dream
