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Discussion Starter · #1 ·
Hi everyone; first post here.
working on a '93 Mustang. has a 4 cylinder. automatic trans.
a friend has a diagonistic tool (but he is out of town; and parts store do '96 and up).

Is there a key on - key off (KOKO) type of self-test. check engine light came (back on a short time) after i had put on new egr and egr position sensor (to solve that problem - i hope).
any response in mucho appreciated.
 

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Discussion Starter · #2 ·
if what i have found; should have said KOEO - meaning key on, engine off. i guess that the 93 4 cylinder has the EEV-IV system (is that correct).

this is what i have found:

http://www.dork.com/hiflow50/engine_self_test.html

(don't know if it will link)

can someone tell me if the following is correct (really wierd):

"Finally when finished reset your cars computer, do this by disconnecting the negative side of the battery while leaving your headlights on for 20 minutes."

so, you turn the headlights on, and disconnect the neg battery cable for 20 minutes. does that make any sense ?
the 1993 has codes that flash in the dash.
 

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hey thankyou for posting that link to the the self diagnostics test.....i been trying to get info about a code 74 for sometime now and the info i gathered was not as complete as this source....thanks again its a big help when you find links like this and post them...macmichael
the 93 should have the EEC-IV
not sure about the headlight, battery disconnect though ??????????
 
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