Does anyone know how can i make an ECM code reader ???

 

Do you want to read the trouble codes off the ALDL? I have not seen a DIY code reader. It's pretty simple just looking at them.

 

how do u do that ?

 

Take a paper clip and place it between the the two upper pins at the right side ( A-B )then turn on the ignition ( not start ) and the SES light will flash: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause.After this "12" code repeating three times the "real" error codes come .

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GTA -89:383, 4-bolt,Free flow muffler,dual 3" HF cats, Edelbrock headers, Canfield heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTR, !plenum, 52 TB, MSD 6AL, TPIS level V prom, Superior shift-kit and all the minor mods,looking for a SR ...
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

so a long flash = 10
and a short one = 1
??????

 

88': No, The long pause seperates the individual codes. The first set of flashes is the tens digit. The second set of flashes is the ones digit. Long pause seperates the codes. All flashes are the same length.

 

hum....ok, although the first one appears to be longer...
that means the car is just giving off code 12 which means everything's ok
then how do u explain my problems
(they are listed in both thirdgen sec, and v6 sec, under the topic FIELD SERVICE MODE RESULTS)
please read, and tell me what ya think