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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 05-18-2015, 12:19 PM   #1
fraserp
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Fuel feed line, crushed/kinked

So my rear fuel feed line is damaged. Crushed, now I am seeking advice and recommendations. I noticed it yesterday while doing a fuel filter change. The crush is about 1/2 to 1 inch. It's not leaking but I think it might be a little restricting on the fuel pressure/delivery. The fuel line is made from hardened plastic or pvc tubing or something like that. Would it be good enough to cut out the 1 inch crush section and repair it with like 7 mm fuel line heavy duty hose and clamps or change the whole line. The part # 16126752180. Any and all advice and recommendations are appreciated.
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Old 05-18-2015, 02:08 PM   #2
Kye7
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If you are talking about the hoses that connect to the fuel filter, they are supposed to be replaced. I replaced all of mine when I changed my fuel filter.

Most importantly, were you having problems with it before you decided to change the filter?

Can you post pictures?

Last edited by Kye7; 05-18-2015 at 02:09 PM.
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Old 05-18-2015, 09:14 PM   #3
fraserp
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Quote:
Originally Posted by Kye7 View Post
If you are talking about the hoses that connect to the fuel filter, they are supposed to be replaced. I replaced all of mine when I changed my fuel filter.

Most importantly, were you having problems with it before you decided to change the filter?

Can you post pictures?
First, thanks for the reply. --- No not the hose that connects the fuel line to the filter, those were changed and with new clamps when I did the filter. The rear fuel feed line runs from the rear of car to the 3 inch hoses that connects to the filter. I will try to get some pictures tomorrow.
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Old 05-19-2015, 09:11 AM   #4
markusmarkus
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If you can get a tube cutter in you could remove the bend and replace it with a section of fuel hose. If you can't get a tube cutter in, you could use a dremel; just make sure the fuel line is dry!
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Old 05-19-2015, 11:34 AM   #5
fraserp
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Thanks "markusmarkus " . I was thinking the same but I am worried about the fuel pressure and leakage. Did you or someone you know did a repair like this ???. I was hoping to hear from someone who has done this before to verify that this repair is solid with no problems. (If done right ). I just bought 1ft of high pressure fuel hose and 8 clamps. If I don't hear from the forum experts then I will just dive into it and see what happens. I am going to use 2 clamps on each end and hope for the best Lol.
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Old 05-19-2015, 02:16 PM   #6
fraserp
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Quote:
Originally Posted by Kye7 View Post
If you are talking about the hoses that connect to the fuel filter, they are supposed to be replaced. I replaced all of mine when I changed my fuel filter.

Most importantly, were you having problems with it before you decided to change the filter?

Can you post pictures?
The car did show some signs of fuel starvation sometimes at speeds above 90 mph,and at full open throttle, thats why i did the fuel filter and it waaassss dirty. Yes, Yes it has improved some. Well the gas tank is about 90% now so when it's below 1/4 I will try this repair.
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Last edited by fraserp; 05-19-2015 at 09:17 PM.
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Old 05-20-2015, 08:23 AM   #7
markusmarkus
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The fuel pressure is about 45-50psi. The fuel hoses, like the ones on the filter, are fine to replace your damaged lines. I'd buy the fuel hide from the dealer.
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Old 05-20-2015, 09:16 AM   #8
Kye7
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Oh man. Those do look pretty bad.
Getting the fuel line free from the filter will be easy. Getting it off of the fuel rail will be much more difficult. I don't know how hard it would be to snake it up there, I've never seen anything like this..

A member posted a DIY for replacing the CCV the other day.. In his first video, he shows how to disconnect the fuel rail from the manifold and remove it.. Perhaps it will help you. I'll try to link it later because I'm on mobile right now.

Do you get better fuel economy because of this problem?..
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Old 05-24-2015, 08:02 AM   #9
fraserp
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. So I decided to go with the bmw STEALER parts -- $75 for a piece of tubing, oh BTW each , with tax $160+ well luckily I can do the work myself. Haven't installed it yet been busy. Will post a few pics of installation for those who are interested. It's pretty simple. Oh and it's not plastic as I thought before
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Last edited by fraserp; 05-24-2015 at 08:29 AM.
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Old 05-26-2015, 06:25 PM   #10
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The only reason one would get better fuel economy is because they aren't going over 90 mph now. The car will always expect the amount of fuel that the ECU requests and if it can't get it (due to fuel hose restrictions for example) then it will sense there is a problem and performance would be affected. The ECU needs to always keep the proportions right of air/fuel so if your fuel is cut down it has to cut down on air as well and now you have massive loss in power.
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Old 05-26-2015, 07:53 PM   #11
fraserp
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Quote:
Originally Posted by kd7iwp View Post
The only reason one would get better fuel economy is because they aren't going over 90 mph now. The car will always expect the amount of fuel that the ECU requests and if it can't get it (due to fuel hose restrictions for example) then it will sense there is a problem and performance would be affected. The ECU needs to always keep the proportions right of air/fuel so if your fuel is cut down it has to cut down on air as well and now you have massive loss in power.
+1
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Old 05-27-2015, 08:43 PM   #12
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Ok I finally got it done. Here's some pics of my diy. It's a pretty simple task but care and safety is a MUST. First let me say for those who want to do it themselves do so at their own risk. I can only speak of my own experience and offer some pointers.
Tools :
flat screw driver
Long nose locking pliers
13mm socket and ratchet
Catch pan
Safety glasses, gloves, rags,towels ect.
I also bought new hose clamps. I don't think the ones on the hoses are reusable

Procedure:- follow the in pic instructions.

REMEMBER TO REPLACE THE FUSE (54)
TURN ON IGNITION -DO NOT START - FOR ABOUT 15sec. Turn off for about 15sec then turn on for about 10sec then try to start. May take more than one tries.
Good luck.
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Old 05-28-2015, 09:52 AM   #13
fraserp
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Ok so will someone please wake me up from this dream , did I just find some hidden hp and torque.. Initially I thought the struggling was only above 90 mph. Was I wrong. From say 60 to over - - -, WOW, the car was definitely suffering from fuel starvation. At WOT you can hear the difference in the engine and feel the power. The car will go from 0 to - - - whatever effortlessly (almost ) .
A couple of points to note. The damage to my fuel line was a bit more extensive than i thought as in pic. It was extremely hard to blow through the lines. Yes the hose clamps that I used are the cheap ones that are known to cut hoses. Unfortunately they were the only ones available and if you don't over tighten they should be OK.
The section where I said turn ignition on for 15sec and off for 15sec ect. ----- IS NOT a rule,law,must,commandments or whatever. It's just how I did it, in building back up fuel pressure.. Once again good luck and be safe.
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