RE: [DML] Help?! Please? Fuel system problem.
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RE: [DML] Help?! Please? Fuel system problem.



I'm currently refurbishing 03238.  The PO had also installed a fuel pump
backwards.  That happened to be an aftermarket pump, but it was an
appropriate pressure and flow rate, and the car did run once reversed
again.  Since then I have installed a new, proper fuel pump.

 

I had had to replace the fuel distributor because it was leaking like a
sieve, but I don't think that was a result of the reverse pressurization
- nevertheless that is the only portion of the fuel system I had to
replace.  The car runs nicely now.

 

To try to track down your problem,  try flipping the plunger on your
inertia switch to disable the pump.  Remove the air filter and push down
the metal diaphragm on the air intake right in the middle of the 5"
round opening.  If it is a bit stiff, you still have pressure in the
system,  push it down a few more times till you have no more fuel
pressure.  Crank it again to get all the gas out of the cylinders.  Then
shoot a 3 second burst of WD40 into the intake through that same
opening, and try to start the car.  If it starts and runs for a few
seconds before it dies, you have a fuel system problem.  If it doesn't
start on WD40 or starting fluid, you may have a spark problem that has
complicated things.

 

If you have a fuel system problem, turn your fuel pump back on at the
inertia switch and crank it a few seconds to re-pressureize the system.
Then, fairly quickly, pop out an injector, hold it over a clear plastic
tumbler, and push down on the diaphragm for 2 seconds, then release.
Did the injector spray a nice even pattern?  Note how much gas is in the
cup.

 

Replace the injector, crank for a few seconds, then repeat with the
second injector.  Repeat until all 6 have been checked.  If all 6
sprayed about the same amount, and had a good pattern,  then the easy
testing is just about done.  If one or more injectors sprayed a poor
pattern or noticeably less fuel, track down the reason.

 

This is not the right way to properly diagnose injector problems, but
you might get lucky.

 

 

 

 

From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf
Of rodney rael
Sent: Thursday, April 10, 2008 6:43 AM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: Re: [DML] Help?! Please? Fuel system problem.

 

I should also add that I previously had a hot start problem maybe 4-5
months
ago, thats when I replaced fuel accumulater, didn't help, then I
replaced
Primary pressure regulator washers, also didn't help, then I found some
seepage at the fuel pump line due to the fuel pump hose being loose,
Does
anyone outthere know what bad can happen when you switch the hoses at
the
fuel pump. I am pretty sure that I created the problem when I stupidly
switched these hoses. I have been struggling with the problem a couple
of
weeks now, reading archives, checking everything I can obviously
eliminate. Any Ideas would be greatly appreciated.

Rodney
3300, 10544.

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