Over the last few months the engine has been cutting out
whilst I am driving (usually after a couple of hours
running) and refuses to restart until I have left it 2 to 4
hours. When it restarts it runs perfectly once again.
When it cuts out there is no splutter or running rough, it
just stops.
I have had the car at the mechanics and he cannot replicate
the problem, new fuel pump fitted a couple of months ago
and mechanic says is working OK, I have had the petrol tank
tested for pressure and a new crank sensor also fitted.
The circumstances at the time of engine failure are -
the outside temperature is over 35 degrees celsius and
the running temperature is one or two notches past half way
The oil pressure gauge has dropped to 0 and the red
light is on (this is a sensor problem not an oil pressure
problem I am told)The oil pressure at the start of a trip
is perfect but after 2 hours drops to 0
Can anyone out there help, I am now desperate and somewhat
hesitant to drive this vehicle.
Chris–
Christopher Goldsmith
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In reply to a message from Christopher Goldsmith sent Wed 5 Feb 2014:
I would hazard a guess at a fuel issue. Have you checked your fuel
filter? Or perhaps you are getting a vapour lock/air lock in the
fuel line? Just my 2 cents worth, but as good a place as any to
start, before you start throwing replacement parts at it.–
sogood
Kerry, Ireland
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In reply to a message from Christopher Goldsmith sent Wed 5 Feb 2014:
You did not say ho often the oil pressure indication drops
to zero, but the car does not cut out. If there is frequent
correlation, I would suggest they were probably related.
Therefore, I would try and fix the indicator problem since
that would drive me crazy more than the cutting out!
Ideas? Bad coil playing havoc with the electronics A lot
of that going around!) Wiring issue causing loss of voltage
to control system, Bad module killing control communication
bus, bad control power relay.
If there is no causal connection between the symptoms, I am
looking for a bad replacement cps, bad coils, bad fuel pump
relay, other control relay dropping contacts.
I suspect some time and money may be required to find this
unless you ar ejust plain lucky!–
Ross - 89 XJS, 99 XJR, 02 XJ8, 12 XF-R
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In reply to a message from sparkenzap sent Thu 6 Feb 2014:
It may be of no consequence, but when I first got my current
x300, its maintenance record was poor. The engine ran poorly
and one of the first things I did was to change the fuel
filter. Although the car ran sufficiently to drive some 50km
its performance was poor. When removed, I could not blow
through the filter at all, yet it ran. I think I would try
the same thing first (as its also the cheapest)and see what
happens. As to the oil gauge, no ideas I’m afraid.–
The original message included these comments:
In reply to a message from Christopher Goldsmith sent Wed 5 Feb 2014:
In reply to a message from Christopher Goldsmith sent Wed 5 Feb 2014:
Hi Christopher,
It would not hurt to open and clean every electrical
connector and every ground stud in the engine compartment.
Regarding the oil gauge dropping to 0, that is a common
problem with the sender (the archives is overflowing with
posts), and the correlation of the gauge indication dropping
as the engine is dying probably is the result of the
decreasing rpm of the engine. I don’t think there is any
reason to believe that oil pressure has anything to do with
your stalling.
I doubt that this is your problem, but it is worth checking
for low transmission fluid, which, believe it or not, can
cause stalling. What I don’t believe it typically does is
prevent a restart for 2-4 hours, but it would be worth
checking anyway.
In reply to a message from Christopher Goldsmith sent Wed 5 Feb 2014:
I understand you’re saying that the engine dies when ‘at
speed’ and then won’t start for some length of time after it
dies. But when it starts, it behaves itself as if it never
died. It could be that the make-up air to the fuel tank is
restricted, and that lowers the atmospheric pressure of the
fuel at the inlet to the fuel pump so much that the fuel
flashes to vapor, the pump loses suction, and the engine
dies from fuel starvation.
The next time it dies, immediately loosen the filler cap
listening for a whoosh of air being sucked into the tank.
That’s a sure sign of trouble with the evaporative emissions
system. Run with the fuel cap loose until you can get the
emission system looked at.–
The original message included these comments:
Over the last few months the engine has been cutting out
whilst I am driving (usually after a couple of hours
running) and refuses to restart until I have left it 2 to 4
hours. When it restarts it runs perfectly once again.
When it cuts out there is no splutter or running rough, it
just stops.
The circumstances at the time of engine failure are -
the outside temperature is over 35 degrees celsius and
the running temperature is one or two notches past half way