engine codes, need some advice. been chasing this for over a year.

[MrShorty]

Glacier's post shows an AutoXray scanner, but there are others out there. I've seen them available at parts stores like Autozone. They may even rent it out so you don't have to buy it, if you don't want to (but who doesn't love buying fancy tools. Hey, last minute Christmas gift idea!!).

 

[kdogg212001]

ok i haven't gotten a code reader yet! but i am going to get it tomorrow when auto zone opens! but my question is where do i plug it in? i am new to the whole computer part of my explorer.

my problem would be that when i am driving and say if i hit the gas and then come to a quick stop it wants to either idle low or die! and its only in town! on the free way its fine! as long as i m accelerating, but sometimes its fine.................... dont think its a vaccum leak cause its not a rough idle!

 

[sparky2263]

Canister purge basic operation;

It is a normally closed valve. It will not pass purge vapors to the intake until energized.

With key on, it always has power to the valve. The ECM grounds the solenoid to open the valve.

It will only operate the valve at a steady speed, fully warmed up. If it were to operate at idle it would result in an over-rich mixture.

The fact that it only sets during long trips leads me to believe the purge solenoid is faulty. You said you replaced it, but then you said something about buying "relays in line with the purge valve". There are no relays there. The purge valve is inline with the vacuum hose going from the charcoal canister to the intake manifold. The higher port goes to the intake, the lower to the canister and it MUST be installed correctly (I'd love to show a pic but for some reason, vBulletin here doesn't allow uploading images).

So, did you replace the right part?

 

[BrooklynBay]

There are different companies that sell dataloggers that you just leave plugged into your diagnostic harness. You could either disconnect it after the trip, and connect it to a laptop, or you could take the laptop with you to see the results in a real time mode as the fault is actually happening. From what you are mentioning, 2 possibilities come to mind. You said that you replaced the engine, but did they also replace the wiring harness? Is the computer the correct one for this engine? I once had contradicting codes when I was working on a GM car. It turned out to be the computer. You can't have a lean, and rich mixture simultaneously.

 

[missouriman]

ok,,
picked up a computer,
what is the difference between the NB and the MB computers?
all the other numbers are the same.

junk yards in this area did not have the NB.

 

[sparky2263]

There are 2 different calibrations for a 1994 Explorer, Automatic, Non-California. Couldn't tell ya' what the difference is.

In other words, it'll work fine.

 

[missouriman]

well napa said there were 5, car quest said 2, junk yard said 2, ford said 2, so I am hopeing that it is newer, better, greater and better.
wife is test driving now so will post up what happens.
the problem is that the problems usually show up on a long trip. the first around 250 miles of 60 to 80 mph driving with the cruise control on.
on the way home from the other side of wy, the check light came on 22 times.
the wife is pissed and ready to leave it on the side of the road and thumb it home.
get this, the code was only the vapor purge valve...so the codes are not consistant (sp) and conflicting, o2 rich, o2 lean, purge valve,, see other thread. I just replaced, mas, tps, o2 sensors, computer, and have all relays that are in the box (6) on order..
pass fail.... if it fails we are getting rid of it, see other post why I don't want to get rid of it..


thanks again to all of you for your input and help..

 

[sparky2263]

NAPA was right. 3 federal calibrations and 2 California calibrations.

Post up the exact code numbers if it resets them.

 

[missouriman]

ok, pickup is better, cruise controll is better, it will spin the tires from a setting start.
will post up milage and stuff later.
thanks all

 

[missouriman]

there is one, on the wireing, it is the (hot line) I don't feel like getting out the manual right now. powers the purge valve and I think the fuel system secondary.
both of which we were getting errors on.

Canister purge basic operation;

It is a normally closed valve. It will not pass purge vapors to the intake until energized.

With key on, it always has power to the valve. The ECM grounds the solenoid to open the valve.

It will only operate the valve at a steady speed, fully warmed up. If it were to operate at idle it would result in an over-rich mixture.

The fact that it only sets during long trips leads me to believe the purge solenoid is faulty. You said you replaced it, but then you said something about buying "relays in line with the purge valve". There are no relays there. The purge valve is inline with the vacuum hose going from the charcoal canister to the intake manifold. The higher port goes to the intake, the lower to the canister and it MUST be installed correctly (I'd love to show a pic but for some reason, vBulletin here doesn't allow uploading images).

So, did you replace the right part?

 

[sparky2263]

You lost me....

Is this what you replaced?

PURPOSE
The fuel vapor canister purge regulator valve is a normally closed valve in the evaporative emission system. It is located in the vapor line between the fuel vapor canister and throttle body.

OPERATION
The operation of the fuel vapor canister purge regulator valve is controlled by the powertrain control module. When the engine is off, the fuel vapor canister purge regulator valve is not energized and is in a closed, non-flowing condition. When the engine is running, the powertrain control module reads engine rpm, engine load, engine temperature and other variables, and decides the proper time for the engine to accept fuel vapors. When this occurs, the powertrain control module energizes the fuel vapor canister purge regulator valve, allowing flow from the fuel vapor canister to the intake manifold. The vapors are then consumed in the engine. This action "purges" the fuel vapor canister of fuel vapors.

Courtesy Alldata

 

[missouriman]

yep, that is what I replaced, it was under the intake, so that is where the old one sits. moved it over to by the vapor can.
so good news. replaced the tps, the 02 sensors, all the relays on the pass side of the truck. replaced the NB computer with a MB computer. code checker comes up 111 and 10. pass......
130 mile drive the cruise controll down shifts the trans rather then shut off. the truck will spin the tires just sitting and floor it. gas milage we will see, but the guage is above 1/2 tank at 135 miles, before it would be below. the rev limiter still kicks in at 4k rpm in park, but seems to run it up to 6k while driveing.
to me it seems to be the computer, the wife had a dream and some one in the dream told her it was the computer. ok go on laugh, she had never seen the computer, told me where it was and what it looked like.. goose bumps.. so... time will tell.
thank you all for you input, and time. will let you know as the story unfolds.

 

[NICE59FORDF100]

thats rather creepy....

 

[missouriman]

yeh it is creepy.
we both have things like that happen. guess you could call it sleeping on a problem.

we have also slammed on the brakes for no reason (at that second) just to have a deer run out 100 150 feet infront of us.

I am not complaining. hope that it is just God looking out for us.

oh sorry ps.
still have the truck, the check engine light has not came back on as of this time.
so the ghost was in one of the parts that I replaced.
thanks again for all your input and support.

 

[NICE59FORDF100]

sounds liek the ghost went of the old parts, told your wife it was the computer than left

 

[missouriman]

maybe...

 

[UDAV]

Hi ALL
I`m also get 565 and 542 KOEO Codes on my 93`explorer. Usually "check engine" lamp light up after 10-40 minutes after engine start.
What i must heck or repair in first time? Purge valve?
Where is "the fuel vapor canister" on my car?
Thanks!

P.S.
Sory, bad english, i`m from Kyrgyzstan.

 

[missouriman]

do you have a book on it?
try replaceing the relay switches that are on the right side of the fender under a plastic cover there are 8 of them.
I don't remember what one of the 8 control that valve.

 

[UDAV]

to missouriman

Ok i will chek relay switches in Power Distribution Box also, thanks!

"the fuel vapor canister" and "charcoal canister" this is a same?
This is it on foto (lower parth of foto)?
http://img378.imageshack.us/my.php?image=im0001306mx.jpg


I have already found
http://www.explorerforum.com/forums/showthread.php?t=155281

 

[UDAV]

I have located the following problem:

On the foto

.
http://udav.atlant-inform.ru/_ford/IMG_5180_800_600.jpg
i see no vaccum pipe and no Purge valve I have bought a car without this staff
On left side i see pipe from mainflow with bolt as plug.
My opinion in this plaсe (marked "?" by me at the foto) must be Purge valve.

On the other foto from this site I have found similar valve

http://udav.atlant-inform.ru/_ford/im0001306mx_800_600.jpg
Is this Purge valve?

Please, if possible, make a picture of purge valve with electric cutoff or please explain to me how I can find the cutoff in my X (on first picture)?

I can order new Purge valve, but i need know where it must be mounted and where I must locate electrc cutoff point for it.

Thanks!