[x300] Water in gas...not so sure

X300
1

Still having an issue. After sitting in 35 degree weather
(cold rain)for 2 days,I went to start the car and it barely
started and idled very rough and when I tried to give it gas
it would barely rev, coughing and backfiring and sometimes
finally dieing. After quite a while it finally started to
idle normally. Back to square one. After a lot of reving,(as
much as it would…) backfiring and sputtering, I was able to
drive it as long as I didn’t rev above about 2000rpm. I
drove about 200 miles at about 55mph directly to my trusted
local mechanic, who will see my car parked in front of one
of his service bays when he comes in at 8am tomorrow.
It almost feels like the timing is off. Someone told me
about a guy with a Cadillac who thought he had water in his
gas, took it too the dealership and it was a hundred dollar
sensor. Any Idea what sensor would cause these symptoms?
Time to get this fixed!..
Thanks in advance for any help!–
Michael Freeland
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

2

In reply to a message from mfreeland sent Sun 24 Jan 2010:

than water in the gas.
check connection to your maf sensor.from my nissan experience it seems more likely a maf issue rather

3

Hi Michael.

I was able to drive it as long as I didn’t rev above about 2000rpm.

This is a very common symptom of a fuel delivery problem. It may be
as simple as a clogged fuel filter, or it could be more involved.

  • Mark
4

In reply to a message from Mark Pilant sent Mon 25 Jan 2010:

Yeah I think you’re right. My mechanic changed the filter
today and it had a lot of debris and when he started it it
helped somewhat, but still is having problems. So next step
tomorrow is to drop the tank and clean everything out
including the screen. Betting this will take care of it.
Will let you know…
Thanks,
Mike–
Michael Freeland
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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5

Hi Mike.

One of the easiest ways to see if it is a fuel supply issue is to
hook up a fuel pressure gauge to the fuel rail (at the injectors)
and see how the fuel pressure behaves when you drive it around.

A fuel delivery problem will usually show up as a drop in fuel
pressures as the engine is revved up (or loaded up; such as driving
up a steep hill). If this happens, it will usually be one of the
following (in no particular):
o Flexible fuel line collapsing, and restricting the flow,
o Clogged in-line fuel filter (or filters),
o Clogged fuel pickup filter (in the tank), or
o Faulty/dying fuel pump.

At one point or another I’ve have all of these on various vehicles.
So far, I haven’t had any problems on our Jag. So I don’t know if
some don’t apply.

Food for thought.

  • Mark
6

In reply to a message from Mark Pilant sent Tue 26 Jan 2010:

Thanks for all of your help. After dropping the tank and
checking the screen, both of which were clean, we replaced
the fuel pump. This cleared up the problem and the car is
running great. Definitely a clogged pump.–
Michael Freeland
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –