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post #1 of 19 (permalink) Old 11-28-2015, 07:13 PM Thread Starter
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Question Car stops while driving

I've been having an issue with my 2005 Ford Taurus SEL recently, and I was wondering if anyone here had any idea about what might be causing it.

Sometimes the car just "turns off" while I am driving.

Specific symptoms:

1) Engine goes off, accelerator does not work

2) Lights / power work, battery life comes on

3) Display says '--------------' or 'FUEL COMP ERROR' (the latter is if I had the display showing 'miles remaining' or something -- if I'm displaying nothing, I get the dashes).

4) After I slow down and I'm nearly stopped (i.e. low speed), I see an oil pressure error message. The power steering turns off when this happens.

5) Right afterward, the car does not attempt to turn over when I try to start it. However, if I just sit and wait for a few minutes, it starts just fine.



Some background info:

This happened to me once a few weeks ago and I took it to a mechanic -- he said he didn't find anything wrong and the computer had no error codes. He drove it around and thought it was fine. He said there was a bit too much oil (I had just had an oil change) and he removed some.

Then I drove it for a few weeks without it happening at all (but it was all fairly short trips).

Yesterday, I had it happen again (unfortunately while I was hauling a bunch of stuff from my old apartment to my new one), and it happened 4 times on the way home.

Both times when this happened I had parked the car (for 30 minutes or so) on a steep hill -- no idea if that could have something to do with it.

Thanks for reading!


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Last edited by TMarsh253; 11-28-2015 at 07:16 PM.
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post #2 of 19 (permalink) Old 11-28-2015, 09:46 PM
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Have you had the battery load tested? Terminals clean?

It's SHO time!


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post #3 of 19 (permalink) Old 11-28-2015, 09:58 PM Thread Starter
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Quote:
Originally Posted by jag1959 View Post
Have you had the battery load tested? Terminals clean?
I haven't had it load tested, but I did just replace it about 2 months ago so it's brand new. My previous one was very old and wasn't holding a charge.

Cleaning the terminals is a good idea -- will see about that.


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post #4 of 19 (permalink) Old 11-28-2015, 11:13 PM
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Definitely sounds like it could be a low/no voltage issue. Terminals, connections and cables bear inspection. Cables can corrode inside the insulation. It is not unheard of for new batteries to fail and load tests are simple enough.

It's SHO time!


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post #5 of 19 (permalink) Old 11-28-2015, 11:20 PM Thread Starter
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Quote:
Originally Posted by jag1959 View Post
Definitely sounds like it could be a low/no voltage issue. Terminals, connections and cables bear inspection. Cables can corrode inside the insulation. It is not unheard of for new batteries to fail and load tests are simple enough.
Checked out the battery terminals, they look really clean (since it's so new). The connectors were a little grody -- I gave both of them a good cleaning anyway (with battery cleaner + round inner/outer wire brushes). Maybe that will fix it but I guess only time will tell since it is sporadic.

I'll see about doing a load test -- I don't suppose there's a way to get that info without a voltmeter?

Thanks for your advice.


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post #6 of 19 (permalink) Old 11-28-2015, 11:45 PM Thread Starter
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I just saw the Engineering Test Mode post on this forum, so I gave that a whirl to see the voltage.

I wish I had tested it before I cleaned the battery connections...

But the test now showed this:

Engine off: it was sitting between 12 - 12.1 volts
Engine on (in park): over a few seconds it slowly increased from 12 to 14 then hovered between 14 - 14.4 volts
Engine on (in park) with AC/fan full blast, radio on, and USB charger charging my phone in the cig lighter, it sat around 13 - 13.5 volts


Does any of that indicate a problem?


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post #7 of 19 (permalink) Old 11-29-2015, 08:12 AM
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Did the problem happen with the old battery and also the new battery or just after you installed the new battery.
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post #8 of 19 (permalink) Old 11-29-2015, 12:37 PM Thread Starter
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Quote:
Originally Posted by Automender12345 View Post
Did the problem happen with the old battery and also the new battery or just after you installed the new battery.
This happened for the first time a couple months after getting the new battery.


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post #9 of 19 (permalink) Old 11-29-2015, 01:35 PM
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The voltage readings are good. Load test done yet? Go through the connections, ground, alt, power distribution box and inspect the cables

It's SHO time!


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post #10 of 19 (permalink) Old 11-29-2015, 02:01 PM Thread Starter
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Quote:
Originally Posted by jag1959 View Post
The voltage readings are good. Load test done yet? Go through the connections, ground, alt, power distribution box and inspect the cables
Haven't done the load test yet, I first need to get my hands on the proper tools.


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