[DMCForum] Re: Fuel system updates - help!! long long long...

["cruznmd" <racuti1@xxxxxxxxxxxx>]

Ej,

You have obviously researched this thoroughly and if you have 
positively verified that the line is rated for the highest pressure 
exerted by our fuel systems then I agree that you should be ok.

In fact, I appreciate the numbers and information that you've passed 
on.

Rich A.

--- In DMCForum@xxxxxxxxxxxxxxx, "EJ Chambers" <marmieej@xxxx> wrote:
> Rich:
> 
> After I recovered from the panic attack you just gave me (j/k), I 
did
> some looking up on my own. I did not purchase normal fuel line, but
> rather fuel injection hose, denoted by the rating 30R9. Pep Boys 
does
> have both, so make sure you get the correct type. 
> 
> After looking at various web sites, it appears that the minimum max
> pressure required for 30R9 hose to operate is 100psi, which exceeds
> your calculating. To top it off, many fuel injection hoses (various
> vendors I assume) can operate at a much higher pressure, upto 
200psi. 
> 
> Will the hose I purchased go that high? I have no clue. But as long 
as
> it can handle upto 100psi, I should be fine.
> 
> Also, a warning!! When I went to purchase additional hosing due to
> running out, I went to an Autozone to purchase more. They tried to
> seel me 30R7 hose (normal fuel line, not rated for fuel injection). 
I
> told them that was not fuel injection hose and to look at the
> reference number. They claimed that is what they sell as fuel
> injection hosing. I did not purchase the hose and just went to the
> nearest Pep Boys.
> 
> Let me know what you think and your take is.
> 
> Ej
> 
> --- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote:
> > Ej,
> > 
> > Hey, I've cross-referenced some parts at the local parts houses, 
but 
> > fuel line from PepBoys? Are you trying to go out in a blaze of 
glory?
> > 
> > The main line (primary pressure) called out in the manual is 4.9-
5.3 
> > bars. A bar is 14.25 psi. That comes out to 71-ish psi. Higher 
than 
> > your typical Volvo fuel system if the literature I read is 
correct.
> > 
> > Personally, I wouldn't run fuel line other than vendor approved 
but 
> > I'm not here to lecture. Just be careful.
> > 
> > Cheers,
> > 
> > Rich
> > 
> > --- In DMCForum@xxxxxxxxxxxxxxx, "EJ Chambers" <marmieej@xxxx> 
wrote:
> > > Hey Walter:
> > > 
> > > "> That weaved thread is exposed because the original black
> > > > vinyl(?) coating rotted & fell off."
> > > 
> > > That makes sense. My car sat for literally 20yrs so any plastic,
> > > rubber that sat outside has become brittle. I did replace 
replace 
> > with
> > > fuel injection hose from Pep Boys. Due to many lines becoming 
> > brittle
> > > and hard (or missing), I've been using this line for awhile now 
> > (with
> > > hose clamps of course) with no problems. This includes on both
> > > pressurized and non-pressurized lines.
> > > 
> > > ">I also would not trust any generic fuel injection
> > > > hose because most of it is rated at a lower pressure than
> > > > what the Bosch K-Jetronic uses."
> > > 
> > > I have to inquire at what pressure does the Bosch K-Jetronic 
operate
> > > at? I would be very interested in knowing.
> > > 
> > > I personally have had great luck with the SpecialTAuto baffle. 
> > > 
> > > ">Anyway, the only real problem with it is
> > > > that whatever glue/epoxy he used to attach a nipple the fuel
> > > > suction screen got ate up by the fuel"
> > > 
> > > This issue did not exist on the baffle kit that I received. If 
this
> > > did pose an issue at one point in time, it appears to have been
> > > corrected. 
> > > 
> > > Just sharing my experiences. Thanks for the info!
> > > 
> > > Ej
> > > 
> > > 
> > > --- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> 
wrote:
> > > > > I have been having hot start problems and then one night I
> > > > was driving home and the car whinned in the front and
> > > > started to convulse and buck all around.
> > > > 
> > > > Hi Brian,
> > > > This could be from sucking air (low fuel or hole/tear in
> > > > fuel suction hose).  Maybe the suction screen is clogged or
> > > > rotted apart.  That would allow chunks to clog the pump.
> > > > The hot start problem could be caused by junk lodged in the
> > > > fuel pump's check valve keeping it open.  Or it could be
> > > > caused by a bad accumulator or whatever.
> > > > 
> > > > > I'm also considering replacing the accumulator and perhaps
> > > > the
> > > > coil... just to update the system a bit.  Is this a good
> > > > idea or not
> > > > really neccessary?
> > > > 
> > > > Maybe.  If you do replace them, I suggest test-driving the
> > > > car after each project.  Then if there is a problem with a
> > > > new part, you have fewer things to suspect.  Replacing the
> > > > original coil with something newer (provided it is a proper
> > > > replacement) can make an improvement.
> > > > 
> > > > Replacing the accumulator is a really tough job.  You run
> > > > the risk of kinking hard lines, not being able to properly
> > > > attach new hoses, etc.  And when you cut loose the original
> > > > hoses from the barbs, don't scratch the damn barbs with a
> > > > razor.  It makes them more prone to leaks.  This is easily a
> > > > project that may require you to order additional parts once
> > > > you get into it.  A stubby set of wrenches is very useful.
> > > > Also sometimes I use line wrench crow-foots (aka flair nut
> > > > wrenches) on swivels & extensions just to get up in there.
> > > > Rob Grady told me that he can heat & attach new hoses to the
> > > > barbs while they are on the car.  My advice: don't try this
> > > > at home.  It takes some practice to get good at attaching
> > > > hoses even while the fittings are off the car.  This
> > > > wouldn't be an issue if they sold hoses with new fittings,
> > > > but some of the them are no longer available.
> > > > 
> > > > > Also, in the process the plastic gas line hose with weaved
> > > > thread (or
> > > > whatever it is) was broke in 3 different places.
> > > > 
> > > > Hi EJ,
> > > > That weaved thread is exposed because the original black
> > > > vinyl(?) coating rotted & fell off.
> > > > 
> > > > > Had to replace with fuel injection hose.
> > > > 
> > > > The only kind of replacement hose that I have liked so far
> > > > is what PJ Grady sells.  It's very orange, though.  It goes
> > > > on the same way as the original (have to heat it) & requires
> > > > no hose clamps.  I would not trust any kind of hose clamp on
> > > > the high pressure side of the fuel system (my personal
> > > > bias).  I also would not trust any generic fuel injection
> > > > hose because most of it is rated at a lower pressure than
> > > > what the Bosch K-Jetronic uses.
> > > > 
> > > > > If you do go ahead and replace the pump, or hoses I would
> > > > definitely
> > > > recommend the new baffle unit sold by SpecialTAuto.
> > > > 
> > > > I've seen one of these before.  I forgot who's car it was
> > > > in... Samuel's?  Anyway, the only real problem with it is
> > > > that whatever glue/epoxy he used to attach a nipple the fuel
> > > > suction screen got ate up by the fuel.  If you buy his
> > > > baffle, I recommend asking first if he is aware of and
> > > > corrected this problem.  If you're not on a tight budget, I
> > > > suggest keeping the fuel baffle original.  The suction hose
> > > > made by Ken K (sold by PJ Grady) is the best.  This way the
> > > > fuel suction screen can touch the bottom of the tank.  This
> > > > makes it less apt to suck air without transmitting fuel pump
> > > > vibrations.  If the suction screen on the SpecialTAuto rig
> > > > touches the bottom of the tank, a lot more vibration will be
> > > > heard.  If it's too high then you won't be able to use all
> > > > the fuel in the tank.
> > > > 
> > > > Fuel pump boots only last about 5 to 7 years of normal use.
> > > > No one makes a boot that is worth a shit.  Of all that I've
> > > > seen, I like Don Steger's boot & cover the best.  The boot
> > > > cover that PJ Grady sells looks exactly like OEM, but it
> > > > shrinks & turns rock hard in the presence of fuel vapors.
> > > > 
> > > > Walt

---

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