code readers
Elder User
Joined: Dec 2002
Posts: 559
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From: South Carolina
For fuel injected F-150's up to and including most 1995, you don't need a code reader. They work fine, but a paperclip and the check engine light will do exactly the same thing. You need a Haynes manual (About $17.00) because this will detail the "paperclip" procedure and tell you a little bit about what to do once you get the codes. The codes will help you, but they will not do all the diagnostic work for you. There are also several diagnostic modes to use, key on engine off, key on engine running, cylinder balance for those with sequential EFI, etc.
Basically, you use a paperclip to jumper the black and gray diagnostic connectors under the hood. You really need to see the diagram and follow the procedures outlined in the repair manual for this to work. When you set it up right, the check engine light will blink the codes out for you. There is a sequence, so once again, get the book first, and leave the OBD I code readers on the shelf. They're not necessary.
Basically, you use a paperclip to jumper the black and gray diagnostic connectors under the hood. You really need to see the diagram and follow the procedures outlined in the repair manual for this to work. When you set it up right, the check engine light will blink the codes out for you. There is a sequence, so once again, get the book first, and leave the OBD I code readers on the shelf. They're not necessary.
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spudlicker
1987 - 1996 F150 & Larger F-Series Trucks
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Sep 28, 2016 08:36 AM
