sstrickstein

Yesterday I replaced both my fuel regulators and the fuel damper on the injection for my 1984 928S. At the time I just put the new parts on and tightened down the fittings. On the way to work this am I smelled strong gas odor. I pulled the air box out and sure enough the moving around of the old rubber fuel lines caused the leak. I got some high pressure bulk injection hose from the auto parts store and some new clamps. No more smell. Once the hoses were out I bent them around and saw several cracks in the outer layer and separation between the layers. This is such an easy fix that will prevent a fire.

whatudrivin

You are so lucky! Glad you got to it before fire did!!!

docmirror

No carbeques. Change your fuel lines this week!

jeff spahn

Yep. This is something we tell everyone who buys a shark. You would think everyone who is on the 928 forum should know this before they buy or even just as a 928 owner. I don't ever see a problem bringing this issue up again and again.

Barry Chan

So that's the warning...was the car also running rough while it was leaking?

Imo000

The warning is acually the cracks.....the leak is a faliure.

sstrickstein

There were no problems or cracks before I change the fuel regulators. But after moving around the lines to install the new regulators obviously I found the problem with hard lines. I live in Arizona and rubbers kinda turns to rock here. What about the little rubber lines to the fuel injectors from the rail? This was one of my future plans. I was going to pull all the fuel injectors have them professionally flowed. I had this done to my 944 and it made a lot of difference. Of course they replace all the all rings and parts so I guess they will change those rubber lines if I have these done. Reason I changed the fuel regulators in the first place was hard starting I figured I had fuel leaking into the intake. I also had the usual hard start once the car is hot. We will see tomorrow morning if I have solved the problem. If not I also have a fuel pump check valve waiting.

mickster

This is a problem everywhere. Rubber ages-even in controlled storage.

There's a reason tires need to be changed every 6 years and not be older than 10 years of age (assume you bought new old stock, 4 year old tires or had them in storage).

auzivision

One thing I've noticed is many fuel fires and/or scares occur shortly after working on or near fuel lines; coincidence? I don't think so. IMHO multiple leak checks should be SOP following any repair where fuel lines maybe touched.

I often raise the hood in the garage after driving hard to a let it cool off, be look at it, and see smell it. Something about the distinguishing smell a 928 emanates after spirited driving make the whole garage smell good.

Glad you where identified the leak before it got toasty.

Mike Frye

You should watch those new lines. One reason Roger spent so much time researching the lines he started selling was the bend radius and tendency to kink.

Not sure about your MY but I know in the S3+ the original lines had a hard plastic liner and just a rubber outer layer. This inhibits kinking and ensures that the ID of the line is consistent. You don't need to start starving your car of fuel one day when things heat up in there.

Same deal with the hose clamps. Be careful as some will provide a more consistent clamp pressure all around without pinching it anywhere.

sstrickstein

Found the rubber fuel line back by the fuel pump was loose as well leaking gas into the cover. Hopefully that's the source of my hard starting.

jnaarnold

Please keep us updated. I too am experiencing hard starting, I think mine is a looking injector however. Good info...thanks..

sstrickstein

Well I got up this morning and headed out for work. Same hard start as before. So I went and replaced the check valve. Everything seemed tight and no leaks like yesterday. Care is sitting for a few hours for a leak down test. If it doesn't solve it I must assume I have a bad pump that is leaking somehow.

MainePorsche

On the point of fuel line safety, even though there is no bend radius involved, those straight little segments of rubber fuel line on pre S4 fuel injectors should also be inspected.

sstrickstein

I'm considering taking the injectors out and taking them to be flowed. They charge $20 per so that's a deal