Mongo

I keep reading about fires on these cars. In the past month, we have seen three users cars on here (one just registered days ago) lose their cars to fires.

Whether the cause is improperly seated or even defective injectors, it'd be great to collect all the knowledge on this board to create a checklist for Fire Prevention. This includes even when doing intake manifold services, and the extra due diligence needed in checking the fuel system after parts have been reassembled.

So I'm putting this thread out there, because clicking the search yields hundreds of threads on fuel lines and fires, but no real "definitive" thread on what to look out for, such as what lines are under pressure, and yes many of us know of the U-Shaped hose in the front passenger side of the engine, but not many NEW owners do.

Please, share your thoughts. And, those who have experienced fires, I don't know if you intend to stay in the 928 crowd and search for another, but I hope this thread gives you hope should you decide to purchase another one.

So let's hear it...

Randy V

Don't install a fuel pressure gauge.

hwyrnr

I think this is a great idea, especially since this is on my to do list real soon.

Fuel hose size, gaskets needed, vacuum line sizes, tips, hint, and the don't forget about items.

James

Mongo

There is one I am guilty of not replacing to my knowledge. I think PET calls it the 'fuel return line'. It is #10 in the picture. Auto Atlanta has so many part numbers for it, I don't know which one is the right one for my early 1987 (built October 1986). I can confirm my line is all rubber, and is NOT #10A.

Taguid

IIRC you can get 10A and the 91 MY regulator and update your setup. I just bought 10A and replaced it for $60.

davek9

Number one (for me) after doing anything involving Fuel system (lines / Injectors).

Always Pressurize the Fuel system and check for leaks before enabling the Ignition system and starting the engine.

After starting the engine (before installing the Air box) watch for leaks while it warms up.

I'm getting ready to do this again this week, hopefully all goes as planned

Mongo

I called my local Porsche dealer about Hose #10 for the 1987 cars. The part number 928 110 359 04 has been superceded. The correct part number is 928 110 359 09. It does not have the hard metal line though, but you can still use your '87 fuel pressure regulator with it. I bought a new regulator back in 2010, but not the 90+ for the update.

Taguid

I just bought 928-110-359-08 $60. Apparently there is a diff between that one and 928-110-359-09 $39

Mongo

Yes - the "-08" part number contains a portion of hard line, while the "-09" part number is a pre-formed plastic hose.

M. Requin

Absolutely! I'm doing this myself later this evening, after much intake work. My 928 will be outside, hose on and primed, fire extinguishers at hand, other vehicles at a safe remove. You cannot be too careful with this.

neilh

Don't forget the power steering hoses, I had a OMG moment and save many years ago on my 81 when the pressure line started leaking!

GT6ixer

There have been other threads like this one that should also be reviewed.

https://rennlist.com/forums/928-foru...on-thread.html

https://rennlist.com/forums/928-foru...-fireball.html

https://rennlist.com/forums/928-foru...revention.html

928S MN

When installing the fuel injectors make sure the retaining clips are seated correctly. Feel or hear them click when they slide home.

Shoot for that matter, make sure you aren't missing some of those clips to start with!

The Deputy

Number one is only the beginning of finishing the post repair vigil.

Number two is just as important...and that is...by checking your work each and every day afterwards for a week, then once a week for another month and then once a month for the rest of your ownership of the 928. Most of these cars are thirty some years old and are being repaired with non-manufacturer parts, so certain caution have to apply. Add in the owner participation to the repair/equation...and you have plenty of room for error.

Face it, I'm a mechanic, so when something seems, feels, looks, acts, smells...strange...I get to the bottom of the problem before continuing. This isn't a "knock" against those here that are making their own repairs, however, just be sure to ask plenty of question prior, during and after making any repair. Numerous times I come on here and someone will be asking tons of "what seem to be" stupid questions...but truth be told...they are going about the whole procedure correctly. If you are uneducated about a certain system and need help and don't ask...who is the stupid one? Again, this is not a "knock" against anyone here...I'm ignorant to several things in life...if you don't believe me...you can call home and ask my wife.

A good habit to get into, in my opinion, is to open your hood everytime you get home from a drive. Besides letting out unwanted heat buildup, it gives you an opportunity to do a little stiffing/looking around for issues. Most future issues start somewhere, so checking under the hood, periodically, helps wards off future issues.

Brian.

Daniel5691

great advice.