Search | Car Forums | Gallery | Articles | Helper | AF 350Z | IgorSushko.com | Corporate |
| Latest | 0 Rplys |
|
Engineering/Technical Ask technical questions about cars. Do you know how a car engine works? |
Show Printable Version | Email this Page | Subscribe to this Thread |
|
Thread Tools |
07-27-2008, 03:17 AM | #1 | |
AF Newbie
Join Date: Feb 2004
Location: kewaskum, Wisconsin
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
|
Mystery fuel pump whine...
Car in question is '98 Trans Am. I drove it about 90 miles a week ago and the ambient air temp was about 90 degrees f. With a half tank of gas, the fuel pump developed an excessive whine, yet the car ran perfectly. The next day, the whine was gone and I have maintained 60 p.s.i. with no further noise. Car still runs perfectly, nothing seems wrong. ...My question? Can higher ambient temperatures, or longer trips, temporarily cause the fuel pump to produce excessive noise?
|
|
07-27-2008, 07:43 AM | #2 | |
SHO No Mo
Join Date: Jun 2004
Location: Cedar Rapids, Iowa
Posts: 10,976
Thanks: 103
Thanked 353 Times in 346 Posts
|
Re: Mystery fuel pump whine...
Often a noisy fuel pump is a sign that the pump is beginning the process of failing. I suspect you realize that already though since you mention you had half a tank, the apparent health of the system currently, and seem to understand what a failing fuel pump sounds like.
Keep listening for the sound and if you hear it again, I'd suggest you consider replacing the pump. I'm not sure what typically causes the whine when failing, but I'd suspect it's the bushings or bearings in the pump motor. If that's the case, then I could understand how heat from a long trip (pump running the entire time) could cause noise on the trip but the noise to be much less pronounced after sitting for quite some time and cooling. -Rod |
|
|
POST REPLY TO THIS THREAD |
|
|