Christopher Zach

Hm. So on my 86 I did a complete hose replacement using your hoses. However the fuel return was just a rubber hose that connected to the FPR (86.5). Does this mean I still have an original hose in there and a resulting fire disaster? Or is the fuel return low pressure and not a big deal?

GregBBRD

You do have an original rubber hose, but as long as it is a relatively new hose with good clamps, doubtfully it will give you any problems for many years.

First of all, both ends that this hose attach to were made to accept a rubber hose with clamps, so there is no danger of clamping rubber hose over barbs made for plastic tubing (a very stupid thing to do!)
Also, the hose runs from one fixed point on the engine to another fixed point on the engine, so there is no movement/flexing of the hose (unless someone physically moves it around.)
Lastly, you are correct about the lower pressure on the return side of the system. This hose does not see as much pressure as the rest of the system.


Up to me making these new regulators, unless you changed the chips to Porken chips (or Sharktuned), here was no solution for that short rubber hose, as the '85/'86 pressure regulators had lower fuel pressure than other regulators.

Now, people with '85/'86 vehicles can replace the regulator with one that has threads to accept my custom replacement hose. This hose eliminates 3 pieces, which have 2 additional connections with the possibility to leak fuel in the stock arrangement.

When your existing regulator leaks fuel past the internal diaphragm and out the nipple for the vacuum hose, I'd encourage you to "update" to my new regulator and one piece hose.

GregBBRD

Incidentally:

Here's what "making stuff up", "lying", and "fear mongering" looks like, through my eyes:



This is the information I have.
And I don't have any other way to interpret what I said, looking at that piece of paper, from my dealer.
I had my dealer double checked this, twice, on Friday.
Same result.

This is all I have to go on.

.....And irregardless, the stock regulators (at retail) are 2.5X what my new regulator costs!

Tomkat80222

Please relax and answer this question. Is this a part that is aging and should be replaced since its 26 years old or should one wait for issues to arise?

The Forgotten On

If you can afford to replace them do them every 20 years or so. They're just a rubber diaphragm inside and it will eventually dry out and fail at the least opportune time.

This new design allows you to replace them with off the shelf cheap Bosch parts used in more modern cars for ~$50 in the future.

GregBBRD

I'm not proactive in replacing these and the dampers.
I wait until I can actually see/smell raw fuel on the vacuum side, for my own clients cars.
That being said, it's pretty common for them to leak, these days.
Ethanol in today's fuel seems to soften/attack the internal diaphragms.

We get a lot of 928's with running problems and these pieces are the first thing that we check to see if they are leaking raw fuel into the vacuum system.

hacker-pschorr

I would be hesitant to replace these simply due to age using the uber expensive factory parts. Now that we have an option of installing a modern regular / dampener, I see this as a worth-wild upgrade. If for no other reason, I'm sure the modern versions are better suited for some of the crap in modern gasoline.

checkmate1996

any updates on the damper to eventually replace 928 110 202 00 (bosch equivalent 0 280 161 008) ?