93 Ex Running Rich

HEY, First time on forum
I have a 93 EX 4.0 Auto. Rough low idle,black smoke from exhaust.
Fuel pressure checked at 12 psi key on 35 psi running holds good pressure.
Pull codes with cel 117,122,112,513,565,556,629, and 566.
Any info would be helpful. Thanks

Welcome to this forum! Check my thread on EEC-IV codes: http://www.explorerforum.com/forums/showthread.php?t=160035. It's # 17 in my list of useful threads.

Welcome to Explorer Forum!

Thats alot of codes! Reboot PCM. If that doesn't work replace it.

I have a 94 Eddie Bauer Ex 234+K miles. I was getting alot of codes as well. One of which was Code 513 (Faulty PCM), I was able to pull a PCM from a junkyard for only $50. Easy to pull and install. Try to find same year Ex and pull it yourself.

Also if you have ATF in your vacuum lines, you need a new Tranny Modulator installed. A local shop should be able to do it for a $100 plus parts. While you are checking your vacuum lines for ATF, look for a loose or disconnected hose. They tend to blow off when the truck backfires due to ATF in the intake.

Pull a part In Augusta GA has a 93 Ex on site.


Location: Augusta, GA
329 Sand Bar Ferry Rd, Augusta, GA 30901

Make Model Year Row Location Date On Yard

FORD EXPLORER 1996 300 Augusta06/14/2007
FORD EXPLORER 1995 302 Augusta06/20/2007
FORD EXPLORER 1994 301 Augusta06/18/2007
FORD EXPLORER 1994 310 Augusta08/08/2007
FORD EXPLORER 1993 312 Augusta08/13/2007
FORD EXPLORER 1992 312 Augusta08/13/2007
FORD EXPLORER 1992 301 Augusta06/18/2007
FORD EXPLORER 1991 314 Augusta05/30/2007
FORD EXPLORER 1991 314 Augusta05/30/2007
FORD EXPLORER 1991 300 Augusta06/14/2007
FORD EXPLORER 1991 303 Augusta06/23/2007
FORD EXPLORER 1991 304 Augusta07/05/2007
FORD EXPLORER 1990 309 Augusta07/31/2007

fear93 said:

HEY, First time on forum
I have a 93 EX 4.0 Auto. Rough low idle,black smoke from exhaust.
Fuel pressure checked at 12 psi key on 35 psi running holds good pressure.
Pull codes with cel 117,122,112,513,565,556,629, and 566.
Any info would be helpful. Thanks

Click to expand...

117 (O,M) ECT sensor is/was low or grounded - ECT

122 (O,M) TP low (possibly grounded or open circuit) - TPS

112 (O,M) Intake Air Temperature (IAT) sensor is/was low or grounded - IAT

513 (O) Replace processor (PCM) (internal failure)

565 (O) Canister Purge 1 solenoid/circuit failure - Solenoids

556 (O,M) Fuel pump relay primary circuit fault - Power / Fuel Pump Circuits

629 (O,M) Torque Converter Clutch circuit fault - Transmissions

556 (O,M) Fuel pump relay primary circuit fault - Power / Fuel Pump Circuits

Hope this helps!

Moving this to the Under The Hood Forum

Ordered new PCM today should arive in 5 to 7 days.
Keep you posted. Thanks for the help.

New problem! Installed new PCM engine runs great but no overdrive. Pulls fine in drive And reverse but when in overdrive nothing. Worked fine before installing new PCM. Any thoughts Thanks

Reboot new pcm. Maybe they sent you the wrong one.

I'm sure someone here is more knowledgeable than me.

Did a reboot on pcm. Checked numbers right pcm. Local mechanic said could be the sprag. Took it down the road shifted good 1st,2nd, and drive. When I get to 45 put it in OD pulls good no problem. Try to take off in OD wont pull. Kinda of a novice here but what is a sprag. Any thoughts would be very Helpful. Thanks

The sprag is made to turn in one direction only. Did you try to adjust the band first? A bad VSS, TPS, BOO switch, leaking overdrive servo piston, broken band, or 3-4 shift solenoid could cause a lack of overdrive. Did you check the vacuum line for any signs of leaking transmission fluid from a bad modulator? A computer 87-below has no overdrive output. The older A4LD valve bodies only had a TCC solenoid, and no 3-4 shift solenoid.