check engine light coming on?

[proffessor1979]

My check engine light has been coming on randomly. It only seems to happen if I punch the gas a bit and go over 3.5 rpms or so. It will come on, but then it goes off shortly after. The truck feels like it is running great. The only thing I have noticed is that it feels a little flat when I first start it in the morning. Kind of like clogged fuel injectors or something. I changed the plugs recently and thought I kept the truck pretty well maintained so I am not sure how the FI got clogged.

any ideas?

thanks

 

[aldive]

You need to get the code(s) read.

Good luck.....

 

[MrShorty]

As aldive said, the place to start here would be the EEC-IV self-tests (assuming this is on the '94 indicated under your name). You can read EEC-IV codes with nothing more than a paper clip, if you want. See "getting codes" at www.fordfuelinjection.com for a description of the KOEO test. www.dalidesign.com/hbook/eectest.html has a more complete description of the self-tests.

 

[proffessor1979]

I tried doing the computer check with a friends tester. I tried the KOEO and it said vehicle not responding. I heard the machine interacting with the trucks computer though, but after several attempts no luck.

Do you think the contacts could be corroded or something on the test adapater?

 

[MrShorty]

Could be, could also be a fault in the tester or operator error or some other computer fault. I've never used any kind of code reader myself, so the first thing I would do in your situation is try it without the tester, just using a jumper wire while reading the codes on the check engine light as outlined in the above links. At least then you know if the fault lies on the computer side of the connector or the tester side of the connector.