Mechanics

WONT RUN

1989 Ford Ranger • 2.3L 4 cylinder Manual • 150,000 miles

Have replaced everything or have checked it and it wont run unless you unplug the alternator.
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Revansickle7
August 8, 2014.




Check fuses 3-7-10 first then check battery for condition including load test. If stilldoing it have alternator checked by a pro. Also scan for codes and check fuel pressure with a gauge

Hmac300
Aug 8, 2014.
Fuses good, battery load test good, new alternator doing same as old one and had them both checked

Tiny
Revansickle7
Aug 8, 2014.
Fuel pressure 35 and 33 when injectors are firing.

Tiny
Revansickle7
Aug 8, 2014.
Then have a local pro look into it as it's has a short in system. Also check the eec power relay
AD

Hmac300
Aug 8, 2014.
Ecc relay good. Nothing going to ground thats not a ground. Ford dealership cant find the problem either.

Tiny
Revansickle7
Aug 8, 2014.
No idea what to tell you then are you disconnecting the red/lt grn wire to alternator? If so those go to the ignition coils so itmay be eithr grounding out in alternator and or is shorting against engine block or bracket and when you unplug it, it moves far enough away to stop the short so check there. It also goes to dist ignition module as well as radio capacitors. Maybe the capacitors are bad dn causing this as well.

Hmac300
Aug 8, 2014.
Unplugging the green with red strip that goes from alternator to amp meter in truck. You can also unhook the white or yellow with white strip that goes to alternator and it runs right. Caps for radio are unhooked. Tried that. Its anytime you allow the alternator to charge is when it runs bad. Putting out 13.5 volts.

Tiny
Revansickle7
Aug 8, 2014.

AD