i have a 91 hatch with a gsr it has a p72 and has a obdo to obd1 jumper and is coding 21 and 9 anyone know what those codes are thanks for the help

 

Look in the eg threads there is a sticky on cel codes

 

ok thanks found out why it was coding for 21 now its coding for crank position sensor the car has one of a msd blast caps and the guts are takin out of the topend of the dizzy is that where the crank position sensor would be?

 

Yea on obd1 it's in dizzy obd2 motors have them behind the crank