You meant lost spark right?
to make fire, it takes 3 things
compression, spark and fuel (and air)
lost spark on all cylinders is the test not one.
if lost on all cylinders, check fuses FIRST.
1990 is a very old car. 5L
the Ford has flash codes, try to get those while cranking.
back then the ECU is near intractable, (sux)
all you get on that year is flash codes.
enable diagnostic mode
crank for 5 seconds,
release the key
see DTC flash codes of why it fails.
every do that?
the Diagnostic conn. has an STI pin, we ground that to do the tests.
this book covers all tests you can do with EEC-IV
http://www.amazon.com/gp/search?index=books&linkCode=qs&keywords=9781133715252
a scan tool can be had (hard work) because if this little secret.
Live data, streaming,
started in 1989 all calif FORD cars.
and all FED cars in 1991 (ford)
this fact explans all the arguments on line, for this odd fact.
the fact is the early FED EEC-IV can NOT data stream.
the above book covers this.
I hop this helps you learn FORD, early OBD1 and to find the bad spark.
Most likely the IGN Module in the Distributer.. it is the thing that the wires are attached to under the distributer, usually gray in color.. could be the coil, could be not getting a 12v single from the ign switch to the coil.
127 views
Usually answered in minutes!
×