Ron
By chance, have you noticed like a whining sound sound coming out of the
trunk area. Like your fuel pump is working way too hard?
Dr. Judson Werbela
Greensboro, NC
'89 XJS Coupe
I noticed my fuel pump was very noisy after doing a long drive last
Sunday in the wonderful heat of south Texas. The temp gauge was normal, and
the car was running fine. Is this an indication of an upcoming pump
failure?
I also had a friend tell me that whenever I made a right turn, fuel was
coming out from the area of the left wheel. The gas cap is tight, and the
seal looks good. The only thing I could find was a split rubber hose that
tees into the overfill drain hose from the filler cap area and runs up
towards the deck area. Anyone have any ideas? I plan to pull the carpet
and spare out this weekend to investigate further.
Glenn Haslem
San Antonio Tx
82 XJS
The problem we are experiencing usually begins on a hot Alabama afternoon
with temperatures in excess of 86 degrees. We will be running on the highway
with the top down at approx 65 mph, and she will suddenly quit. Almost like
she has run out of fuel. A diagnostic message FF13: “Pressure sensor: check
manifold pressure difference of engine cranking and engine running.” come
on. If we try to start her she may run for 10 secs to 2 mins engine runs
exceedingly rough, then quits again. However, if we let the engine cool
down 3 -4 hours or over night, she starts perfectly and run perfectly. This
has happened to us 3 times now, each with the he same diagnostic message,
and the same restart procedures, hours later or the next morning.
Can anyone help identify the problem? we appreciate any help.
Ron & Lynn
Phone 334-857-2699
Email: RPardo@eezznet.com
Ron
By chance, have you noticed like a whining sound sound coming out of the
trunk area. Like your fuel pump is working way too hard?
Dr. Judson Werbela
Greensboro, NC
'89 XJS Coupe
'96 XJS Convertible> From: “Ronald J Pardo” rpardo@eezznet.com
Date: Mon, 16 Jul 2001 09:27:52 -0500
To: xj-s@jag-lovers.org
Subject: [xj-s] 1992 v12 convertible
The problem we are experiencing usually begins on a hot Alabama afternoon
with temperatures in excess of 86 degrees. We will be running on the highway
with the top down at approx 65 mph, and she will suddenly quit. Almost like
she has run out of fuel. A diagnostic message FF13: “Pressure sensor: check
manifold pressure difference of engine cranking and engine running.” come
on. If we try to start her she may run for 10 secs to 2 mins engine runs
exceedingly rough, then quits again. However, if we let the engine cool
down 3 -4 hours or over night, she starts perfectly and run perfectly. This
has happened to us 3 times now, each with the he same diagnostic message,
and the same restart procedures, hours later or the next morning.
Can anyone help identify the problem? we appreciate any help.
Ron & Lynn
Phone 334-857-2699
Email: RPardo@eezznet.com
Ron
By chance, have you noticed like a whining sound sound coming out of the
trunk area. Like your fuel pump is working way too hard?
Dr. Judson Werbela
Greensboro, NC
'89 XJS Coupe
I noticed my fuel pump was very noisy after doing a long drive last
Sunday in the wonderful heat of south Texas. The temp gauge was normal, and
the car was running fine. Is this an indication of an upcoming pump
failure?
I also had a friend tell me that whenever I made a right turn, fuel was
coming out from the area of the left wheel. The gas cap is tight, and the
seal looks good. The only thing I could find was a split rubber hose that
tees into the overfill drain hose from the filler cap area and runs up
towards the deck area. Anyone have any ideas? I plan to pull the carpet
and spare out this weekend to investigate further.
Glenn Haslem
San Antonio Tx
82 XJS
Ron
Maybe you have already checked this but have you checked both of your fuel
filters. There is the main one by your fuel pump(covered by carpet on spare
wall and then there is a nasty little nylon strainer/sock inside your sump
tank(expansion tank) under the battery tray. Crud, rust and fuel varnish can
accumulate over the years in the sump tank to the point where it will
gradually block the strainer/sock. You will notice the car gradually losing
power while driving until it quits. That whining fuel pump is telling you
its overworking because of the blockage and is heading for a failure. If
you wait a while the gasoline in the line will back wash a little and the
some crud will clear and settle that was blocking the sock. Then you can
drive again until the process gradually repeats itself. Do not drive the
car until you clamp off the fuel hoses to the sump tank, remove it and clean
it out. The battery must be disconnected before any of this is attempted.
Pour out the contents of the tank and inspect what comes out for rust. Jag
fuel tanks are notorious for rusting around the spot welds which fasten the
inner baffles. If this is not noticed or known in advance, fuel can leak
out at these points into the trunk, on to the rubber tank mat and into the
rubber mat under the rear seats. BIG MESS! I hope this is the right answer
to solve your problem and also help you avoid any escalating collateral
damages.
Download Mr. Palm’s Book from Jag-Lovers. I wished I had, before I learned
this the hard way.
Dr. Judson Werbela
Greensboro, NC
'89 XJS Coupe
'96 XJS Convertible