Originally Posted by
Lazy K
Ford Fuel Injection How To Run a Self-Test Here is a link to checking for trouble codes without a code reader.
ymeski is right you will have codes (they will be 3 digit) so you may as well see what they are. He is also right that it is easier with a code reader but costs nothing to have a go with the above link.
This is true! I just don't trust my counting the flashes. So it's kind of a stress reducer for me & I wanted to do the cylinder output balance test w/ it. but found out afterwards it only does that w/ SEFI's not EFI's. Still worth every penny!