Welcome to the North American Subaru Impreza Owners Club Thursday October 17, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-14-2019, 03:49 PM   #1
EastPhilly
Scooby Newbie
 
Member#: 491030
Join Date: Sep 2018
Default Recent drop in MPG after a line was slightly shifted

Hey all,
I added a front Strut Tower brace on my 2007 WRX. When I installed it I didn't realize that the AC piping pushed against the fuel lines. With the brace installed I was getting right starts and rough idle. The problem was I couldn't just figure out the problem right then and there and had to drive my car (workers comp Dr appointment that I can't miss). I drive with it for about 55 miles. I only get ironers at idle and start, which I didn't have to do much of. When I got home I talked to my mechanic about taking a look. At that time I took the brace off so when I took the car to him we could access everything. As soon as that was off everything worked fine again.

After that I get a squealing sound when my clutch pedal is not depressed (even slightly depressing makes the sounds go away). Also I've seen that my gas mileage has gone down around 2-3mpg when driving that same. We have been slightly colder in weather, but I would not think it would be that big a difference for the weather. Might be wrong though. I thought maybe the fuel line got a little hole that only sees fuel escape at higher pressure? I don't see any fluids on the garage floor or anything like that. I'm just seeing 20mi less per tank than usual.

If they're a way to test the fuel lines? I honestly don't know much about how fuel lines work or are run in terms of normal cars. I only every see them be worked on on race cars where they have completely different setups for high horsepower and fuel cells.
* Registered users of the site do not see these ads.
EastPhilly is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-14-2019, 04:35 PM   #2
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

Quote:
Originally Posted by EastPhilly View Post
Hey all,
I added a front Strut Tower brace on my 2007 WRX. When I installed it I didn't realize that the AC piping pushed against the fuel lines. With the brace installed I was getting right starts and rough idle. The problem was I couldn't just figure out the problem right then and there and had to drive my car (workers comp Dr appointment that I can't miss). I drive with it for about 55 miles. I only get ironers at idle and start, which I didn't have to do much of. When I got home I talked to my mechanic about taking a look. At that time I took the brace off so when I took the car to him we could access everything. As soon as that was off everything worked fine again.

After that I get a squealing sound when my clutch pedal is not depressed (even slightly depressing makes the sounds go away). Also I've seen that my gas mileage has gone down around 2-3mpg when driving that same. We have been slightly colder in weather, but I would not think it would be that big a difference for the weather. Might be wrong though. I thought maybe the fuel line got a little hole that only sees fuel escape at higher pressure? I don't see any fluids on the garage floor or anything like that. I'm just seeing 20mi less per tank than usual.

If they're a way to test the fuel lines? I honestly don't know much about how fuel lines work or are run in terms of normal cars. I only every see them be worked on on race cars where they have completely different setups for high horsepower and fuel cells.

if it were a leak in the fuel line you would smell it a little fuel makes a big stink
subaru_gc8 is online now   Reply With Quote
Old 09-14-2019, 11:47 PM   #3
EastPhilly
Scooby Newbie
 
Member#: 491030
Join Date: Sep 2018
Default

Quote:
Originally Posted by subaru_gc8 View Post
if it were a leak in the fuel line you would smell it a little fuel makes a big stink
I've been working in and around the engine bay the last two days. Haven't smelled a thing. I guess it's just the weather change. Maybe I'll run some fuel system cleaner through it next fill up just in case. I did have a new fuel pump and filter put in recently, but I went ~1k miles without a problem and no observed difference in economy.
EastPhilly is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 04:39 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.