battery cables, alternator, or PCM?

10

Asked by Sep 25, 2014 at 03:59 PM about the 2001 Ford Focus SE

Question type: Maintenance & Repair

2001 automatic Ford Focus problem! Randomly when I am driving at either high or low
speeds my car will all of the sudden jolt and lose acceleration as if it shifted into neutral.
It only lasts for a second or two and only does this when the "multifunction" light turns
on. Sometimes it will stop completely and I will have to restart it at a red light. It will do it
for days at a time and then nothing for weeks. It just started doing it again! What could
this be? Also, my battery light is constantly coming on and off.  And today my car
overheated!

6 Answers

7,075

check fluids

10

fluids are good

59,955

Load test battery to rule it out,then have alternator checked,sound,s like alternator is working randomly,this would cause light to come on,and it would confuse the PCM,and make car run this way,including over heating issue,fan,s not running properly,because of low voltage,and as crumbob said check fluid in radiator and tranny.

7,075

also check continuity of wire from battery pos side to alternator

10

My alternator is slightly over charging at 14.6 but I don't think thats too bad. I was told today that it was my PCM but I don't know...

1 out of 1 people think this is helpful.
59,955

It is hard to diagnose a pcm without hooking it up to computer,if it was a pro,that diagnosed this as it being the pcm,then i would agree,but have it checked,it can be scanned to prove it is bad.

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