Ford Mustang: 95 GT - EEC error codes stored?

From my limited knowledge of OBD and OBD-II, OBD-II are on mostly 96 and
newer cars, I just bought a PC based OBDII scan interface since I bought a
99 Ranger and the check engine light came on. I found a PDF on the internet
http://www.mercedesshop.com/ottoscan/obd2compliantcars.pdf which according
to it the 95 Mustang isn't completely OBDII compatible with their scan
tools; the document mentions that you should check the EPA emissions label
under the hood which should tell you for sure. Ford made a few vehicles in
94 & 95 OBDII compliant prior to the federal gov made it mandatory in 96.

Now from my reading on certain codes which I was dealing with my issues with
my Ranger, under most situations the MIL or check engine light can be
triggered if a fault occurs more than twice before the light can be
triggered; the same is true for some faults in that if they correctly check
out after a certain number of ignition starts then the error code and error
light will be removed. Usually this occurs with ODBII systems unless you
are dealing with something like a vacuum leak or over vacuum. I had a 92
Ranger 4banger which I would get a check engine light if I coasted down a
good sized incline with my foot off the gas and I never worried too much
about it as soon as I accelerated back up to go up a hill the light would go
back out.

The most useful thing you can do before going out and getting a code reader
to log data for an extended time is take note of when the light comes on and
under what circumstances it goes out. It's most likely that the 95 Mustang
isn't ODBII so the codes won't be stored in computer memory as if it was the
code reader would pick up the code even if the check engine light goes off.

The problem with my 99 Ranger turned out to be a dirty MAF and the engine
was running at least according to the computer too lean; so far after
cleaning it no fault has been after 500 mile. It's easy to get the codes
off the OBDII systems but it's much harder to figure out what's wrong.



"Bill J." <net> wrote in message
news:google.com... 

bill, the 95 gt is an obd I car. 94+ v6 cars are obdII.

i don't think the error codes will be stored unless they are serious issues. a
check engine light can be a phantom, and the computer seems to pick which ones
to keep an eye on. my guess, if i had to, would be oxygen sensor issues, which
tend to be the focal point for the 95 computer.

in my own car, no matter how many times the ce light was triggered, it never
stored a thing until an exhaust leak triggered it. seems the o2 sensor wasnt
getting hot enough do to the leak.

hope that puts you mind at ease.
..
tim
95 mustang gt 5spd