cant pull up trouble codes

i have a 94 olds 88 and it says its obd1 equiped but the connecter for testing is a 16 pin connecter instead of the 12 pin connecter i have obd2 sconner tool but wont read codes i have check engine light on and car stalls when slowing down to make a stop cant find out how to get codes. any help would be appreciated thank you

Try bringing your vehicle to Autozone and they can get the code for your car for FREE.

I would suspect the IAC (Idle Air Control solenoid) which is located on top-side of the throttle body intake.

Try removing that IAC and clean it with a throttle body cleaner and a brush. Clean the spot where the IAC goes in to the throttle body intake.

A bad TPS (Throttle Position Sensor) would also cause a problem. Located just below the IAC.
If the gas pedal is not pushed down the TPS should go to the IDLE position and it should produce a minimum voltage to the computer and instructing the computer that it is going at IDLE. If the TPS is malfunctioning, it might give out too low of a voltage and throw off the computer. The TPS can't be cleaned and just need to be replaced.

I suspect the PCM it self

94 was a "bastard" year where GM started its conversion to OBD2 diagnostics.
Most code readers will not read codes on those model vehicles..usually shows and reader error.
I would first pull the code to get an indication what is going on with the PCM and do some diagnostics before replacing any parts

I have the exact same problem as daddymac6 does in post#1. I got a book on how to pull out trouble codes without a scanner for this car. I have a 19 pin plug with only 5 wires going into it. I tried everything the book says and cant get the light to flash and display the code. Anyone know how to get them? Did you ever find your problem? Thank you

actaully its an 18 pin plug, OBD1 compliant

yep yep I got a 94 as well same deal, my only option is to spend 200+ for a decent scanner then buy the adapter cables or go to the dealer/other shop and they usually charge 30 bucks or so.