Codes


big91explorer

15+ Year Member

Joined
Jul 12, 2009
Messages
76
Points
3,101
City
South Dakota
Vehicle Year
1994
Transmission
Automatic
So, i've got a 94 explorer XLT 4.0 auto. And it runs kinda funny, and throws a check engine light, I replaced the TPS and did a tune-up (plugs, wires) PCV valve is good.

Well, so I go to check the codes, and nothing comes up, I mean I get codes for stuff that is happening at the time of checking codes, like fuel pump no power, and stupid stuff like that.

So, my question is, are these computers flash codes only? Meaning they dont store the codes, and they only throw the check engine light when something goes wrong?

Another question, is there any data loggers for these things? Or can I take it somewhere and get it scanned to actually investigate whats wrong? I am in need of help.
 

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