I have a 1994 z28 camaro.... on first start up the car will shift from 1st 2nd 3nd 4th fine then once i come to a stop in over drive it starts out in 3rd wont shift down unless i manually shift it down and it only goes to 2nd. Then i can shut it off for 2mins then it will shift fine untill i come to another stop then it does it all over again. Cant get the car to read a code nor know to flash the ecm... PLZ HELP IM CLUELESS..

 

You already have responses in this thread:

https://www.camaroz28.com/forums/dri...oblems-873825/

Just to clarify, after the 1993 model year, you can not can't flash the codes on the SES light by shorting the pins on the ALDL connector. You need a scanner or scan software.