My 2001 F-150 SuperCrew (4.6L Triton) is exhibiting the following behavior.
Truck will occasionally stall after accelerating after a stop or during a
turn. Engine stops immediately and Odometer reads "---------" all horizontal
lines. If I place the truck in neutral and try to start it won't. If I turn
the ignition off and back on then try to start it will. Sometimes while
accelerating it will try to stall and make a comeback and you will feel it
in the tranny sort of slamming into gear type of feel (by the way it is the
automatic tranny with Overdrive.) And here is something else that happens if
I turn the overdrive "off" using the switch on the shifter it will reengage
(disengage from off ) back on it's own when the truck shudders and attempts
to stall sometimes it is very subtle minor vibration as the engine is in a
state of chaos. I also noted on the highway as I felt the malady about to
happen again I looked down at the speedometer and at a constant 55MPH the
Speedometer pegged to the right and back to the left and returned to normal.
Due to the two previous observations I am thinking something of an
electrical failure might be occurring the question is where? Obviously power
is being lost dropping out the "off" setting on the overdrive. Although
total power loss is not occurring since I see no instrument lights blinking
or the radio missing a beat. I sure hope someone out there has an answer. I
will be going to dealer to get the OBDII codes read maybe just maybe they
will point to the root cause but somehow I am still doubtful that they will
as you all know these intermittent problems can be a "bear".
Thanks in advance for any information or assistance rendered, Bob
Battery connections are fine. Today while driving home on the highway at
60MPH the engine died tach immediately went to zero. I put tranny in Neutral
turned off the ignition switch and back on and then restarted the engine,
and put it back in drive all the while trying to keep the vehicle straight
without PS. Very Scary! Don't think I'll be doing that again. I have to find
the fault wherever it may be or the truck will be considered a safety
hazard to drive.
You don't need power steering to steer a car, especially steer it straight.
I've been driving my '67 Galaxie for over a month now without the power
steering pump connected. My arms are getting stronger already. There should
not be much strength needed at all to steer straight on the highway.
Steering and brake systems with power assist are not fly by wire systems,
the power assist is there in such a way that is the power assist fails for
wahtever reason (stalled engine, vacuum leak, etc.) the steering and brake
systems will still function normally, with the exception of requiring more
force to be applied. Believe it or not there really was a time when power
steering and power brakes didn't exist, and after that a period of time
where they were not common and not standard options. Cars were not dangerous
back then, and they aren't dangerous now. The safety issue is not that you
may have to steer without assist, it is that you are essentially dead in the
water. Not good if it stalls in the middle of a busy intersection or around
a blind curve.
In any case, your problem sounds nearly identical to a problem my mom had
with her Dodge. The instrument panel gauges would be all over the place and
the engine would stumble and act as though it was about to stall. This would
happen pretty randomly. Finally one morning the car wouldn't start so she
asked me to go have a look at it. The first thing I noticed when I popped
the hood was dirty and corroded battery terminals/conenctions. I cleaned
them up good with some sand paper and the problem was gone. Modern cars will
do some really funky things when they aren't getting enough juice from the
This morning the battery in my '67 was dead so I got a jump (was not at
home) and drove the car home with the dead battery. When I got home I turned
teh car off and started it back up for curiosity sake and it cranked slowly
but enough to fire. So I tooled around to work and back with a nearly dead
battery and then when I got home this evening put it on the charger. The '67
has a weak charging system and the battery is getting old, so this didn't
surprise me. I expect it will be fine in the morning. I guess I just find it
weird that a modern car won't run off of the alternator. If anyone knows why
I would be interested to hear it.
I must agree with you here. Might also want to check the alternator belt
too... Even if it doesnt noticeably squeal, it could be slipping.. My
Isuzu Rodeo had worn out alternator belt, which was NOT squealing, but
slipping pretty badly. Took me a day or two to figure out why it wouldn't
run right then, one day the radio shut off and reset to factory
stations/time, while I was trying to roll up all the windows and the batt
guage dropped almost all the way down. That was my clue as to what was
going on, of course my first thought was alternator, had it checked, sure
enough it wasnt putting enough juice.. luckily the guy that owned the
little parts shop noticed it wasnt quite turning as fast as it should be,
and revved it some, and his meter didnt move till a second or so AFTER the
rpms jumped up.
gave the belt a look, and it was wore bad.. so I replaced it, tightened up
to spec, and aint had a problem since (with the rodeo anyway)
Engine died yesterday engine would turn over but not start. I had the truck
towed to Ford dealer when we arrived the truck did start. Service Dept
called back said that they would be changing out the PCM computer. (covered
under emissions warranty) Battery/main electrical system is not the problem.
I had volt meter hooked up during last failure and it didn't show a blip.
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