2006 Ford Taurus starting & electrical problems

JMOCK

MEMBER
2006 FORD TAURUS
3.0L
6 CYL
FWD
AUTOMATIC
98,000 MILES

Replace engine will start but dies started pulling off wires un-plug alternator wires to computer start & runs good information center says check charging system voltage at alt.& Battery 13.9 volts no codes old engine ran good but had crack block wiring harness no cut wires good condition have change alternator and had PCM check.

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,960 POSTS

Hi Jmock,

When you changed the engine, the old engine had a ground strap that went to from the engine to the frame, did you transfer that over to the new engine? ( The block must be grounded for the electrical the work right).

Let me know please,

Best, Ken

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Sunday, June 21st, 2015 AT 10:11 AM

JMOCK

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6 POSTS

Ground strap is hook up & tight, still same

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Sunday, June 21st, 2015 AT 11:36 AM

KEN L

MASTER CERTIFIED MECHANIC
42,960 POSTS

Hi Jmock,

Can you try removing the serpentine belt with the alternator hooked up to see if it runs? I want to see if AC voltage being generated from the alternator is the problem.

If you changed the alternator out and checked all the system grounds and wiring, the problem could be in the computer.

Please let me know,

Best, Ken

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Sunday, June 21st, 2015 AT 12:02 PM

JMOCK

MEMBER
6 POSTS

Took belt off plug in wires would not start, unplug wires started up engine light came on code 193 came up fuel rail pressure high input I check wires on plug 5 volts on outside wires middle wire.03 volt with key on check alternator outside wires no voltage middle wire 12.9 hope this helps the way I understand 2 outside wires are com lines to pcm middle wire is voltage line from battery should it have what ever battery has with key on but unpluged

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Monday, June 22nd, 2015 AT 6:33 AM

KEN L

MASTER CERTIFIED MECHANIC
42,960 POSTS

Hi Jmock,

It sounds like even though the pcm was checked out, they might have missed something, we have checked all grounds and replaced the alternator, I would try another PCM.

Please let me know how it goes

Best, Ken