Where is the diagnostic code reader plug in on a '91 Ranger 3.0L engine?

 

Not sure about the '91 ...try looking on the driver’s side fender behind the air filter box.

 

Strike my last statement, Doesn't apply to Rangers...

This is what I came up with (sorry about the size) ...it looks like the EEC Data (C198) connector is near the driver's side fender behind the battery?

 

My battery and electronics are on the other side of the engine compartment. There is a temination block on between the fuse/relay box and the firewall that says EEC test. But it doesn't look like any thing can plug into it. Is there a typical connector from one of these code readers? I don't want to buy a code reader and not know where to hook it up if it isn't obvious.

Thanks for the help

 

The thing that says "EEC Test" connector should be it.

The connector itself looks like this:



Keep in mind, it might also have a cover on it held on by a clip (similar to a harness clip) or something like that.

 

Yup, that's what it looks like. Thanks for the help. Where did you get the nice graphic for the engine?

 

Glad I could help.

The engine graphic is from AutoZone's website. If you go there and click on the "Repair Info" link and follow the subsequent links to the the "repair guide" for your year and model Ranger, you'll actually find some pretty decent stuff in there.

 

I had my codes pulled last night at auto zone....got codes 11 & 12....This sucker runs poorly...rough idle after sitting a long while(weeks). I got a jumpy tach....goes up by 1K and bumps usually make it go down to right reading....does this at any speed. ABS light has come on and gone off a few times in the past, It also has a cold stall restart issue....9 times out of 10 it wont refire....usually let it sit about 15 minutes minimum and then it starts....With all of these problems I was hoping the computer codes would say something...did get the Haynes book to boot....The connector was laying down on the apron covered as it should be but on its side allowing who knows what into it possibly It was covered with a little bit of pine needles too....If contacts on that were dirty/corroded, what is best way to clean out plugs for good contact....the test was the non running w/ign. on test.....


Any suggestions???

Mine is also a 91 3.0,5spd 2wd,S/cab.....Thx guys

 

Did it run ok before sitting for a while?

 

An 11 is a pass and 12 is not a valid code, you can pull the codes yourself, see the tech info post, pulling eec-iv codes. For the RABS you also need to pull the code, I have information on this in the same thread.

 

That's a good question, did the motor run OK before it sat?

And, does it run or idle differently when it is warmed up? If it stalls when warm can you start it up immediatly?

Ignore the 11 code.

Ken, I thought the 12 code is:

"Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low)" ?

 

yeah, before I left I had run it on freeway a bit fast....but the idle problem has been a constant issue since I got it with about 120K as has the cold stall issue. The abs light hasnt come on in a while....but when it did sometimes it would be off after sitting, go out, comes on after leaving...it was a hit and miss thing. When cold rear brakes seem kinda grabby to me....lining is about 1/2 worn, new cylinders w/small brakes. I also got a temp gauge that likes sitting near stone cold...only creeps up to bottom line most times...I think its a stuck thermostat, but dont wanna spend $$ if its something else.
On a mechanical note....how on earth do you knock the fan clutch loose from water pump? I have reefed everywhich way to no avail....The Ford book doesnt list any special tool for this thing either. Any suggestions on this or the comp. issues is appreciated....I'll go and have the codes checked again just in case corrosion was causing bad contact, but aside from that Im clueless as to whats wrong and im not one to start tossing new parts at something w/o knowing for sure its needed.


Thanks guys....BTW, new look is great

camperspecial65

 

Your right Joe, 12 is the IAC. I've got the flu or something and my heads been full of mashed potatos, guess I shouldn't answer questions right now.

If you need the pinpoint test for the code let me know and I'll email it to you.