Help I Cannot get fault codes!

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Aug 8, 2014 | 05:49 PM

NRFJR

Thread Starter

New User

Joined: Aug 2014

Posts: 3

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From: Mountainburg Arkansas

Help I Cannot get fault codes!

Hello all New to the fourm, Not to Ford Trucks. I have a 1993 F150, 4.9-I6 that started running rough at idle and stalls when pedal is pushed down. Now my question has any one ever not been able to get the self test codes to work? I have jumpered and used a meter and a test light, then went and got a code reader and it will not start the test either. This is very agravating. Any help or at least someone that has seen this would be Great, I have started checking every sensor with a meter but that is a pain. Thanks in advance for any help.

Aug 8, 2014 | 05:52 PM

eakermeld

Cargo Master

Joined: Nov 2013

Posts: 2,168

Likes: 4

From: South Central,MO

Sounds like computer death syndrome. Pull it out and look for leaking capacitors. Look very close, maybe even get a magnifying glass.

Aug 8, 2014 | 07:01 PM

rla2005

Fleet Owner

Joined: Oct 2005

Posts: 20,789

Likes: 1,753

From: Kentucky

Clean the pins on the data link with contact cleaner. Sometimes a small file works well too.

Aug 9, 2014 | 07:00 AM

EPNCSU2006

Lead Driver

Joined: Nov 2002

Posts: 9,557

Likes: 44

From: Concord, NC

If it is a manual transmission, be sure to hold the clutch pedal on the floor. I'm not sure why, but this has to be done on 4.9 engines.

Aug 9, 2014 | 08:17 AM

F350 1990

Fleet Mechanic

Joined: Feb 2007

Posts: 1,652

Likes: 79

From: Mooresville, NC

Connect / disconnect that code reader multiple times to clean your under-the-hood connectors. That "abrasive" action should clean up those contacts --- if not, you'll have to de-energize, degrease, then use an acidic cleaner (vinegar, coke) followed by a neutralizer (baking soda) in distilled water to clean up the contacts.......the "canned" cleaners (e.g. CRC Electronic Cleaner) don't cut it................

Aug 9, 2014 | 08:34 AM

NRFJR

Thread Starter

New User

Joined: Aug 2014

Posts: 3

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From: Mountainburg Arkansas

I know about the clutch I have made sure that it is pushed all the way down, the data link is a spade connector type and I made sure that they were geting a good connection. This all just started on the way to town last week I dont drive the truck that much just on the weekends and to pull the boat to the lake (the most important thing!) If it were a computer problem would the truck still run? All of my mechanical knowledge is old school vehicles 1979 and back so I have to look up everything in the hanes manual that has to do with the things that the computer controls. Thanks for the replys. I will take the EEC out and inspect it.