94 EX HELP (CEL on Long Drives at Hwy speeds) Has anyone solved this Issue?

[X-North]

Anytime it doesnt mather but i did not run it dry so near empty but nou empty put the acetone in it.

Do you mix the acetone with gas in the tank or run it dry then add the acetone? Is this safe?

 

[quicklook2]

that was perfectly clear.

 

[X-North]

as clear as acetone ...for my part I changed my spark plugs for champion , fuel filter, air filter with Fram Platinum yellow air filter, pcv and oil in engine ive put 15W40 in it for hot weather. I only have to change now my rear differential oil.....my truck is old so i have bought mine at walmart Tech2000 for 3.26$ a quart.

 

[glfredrick]

#1 -- bad O2 sensor readings do not indicate a bad O2 -- they indicate bad readings. A bad O2 wouldn't read at all, or be off the map.

#2 -- run 0W20 Amsoil for best mileage and protection. Heavier weight oils cause internal drag and lower performance and mileage.

#3 -- Swap to Amsoil in the transmission, t-case, and diffs -- pick up a couple mpg.

#4 -- Use PB Blaster to free up rusted bolts on the EGR. That stuff is as close to a miracle as exists in nature.

#5 -- K&N, ANE, etc., filters are better flowing than Fram.

#6 -- Fords don't like Champion plugs at all... nor Bosch. Switch to Motorcraft double platinum or iridium.

#7 -- Acetone is a short-lived experience. Once everything is clean from the solvent effect, the mileage change won't be as dramatic.

 

[X-North]

For the oil it depend where you live or what you do with the truck. Personnaly i do lot of up and down hills on unpaved roads so the engine heat build up really quickly.So the viscosity would not be ok my this old engine...sure it would run ok with 0w20 on the highway but here we use low viscosity only in the winter.
For the air filter I prefer fram platinum because this filter is for dirty roads and places. I dont care if it better flow i want the dirt to remain out and with this filter i have no more dirt in my air filter case.
I use Champion spark plug copper pus and thats ok for my truck...dont knoww why you say it dont like it but with the correct gap mine os better than with original motorcraft.
For the acetone i did not say that directly acetone will up your mpg but it helps by cleaning your system. Its up to you after that to use good quality fuel with cleaning agent in it.

Where you come from bro?
I know that mechanic is different from each other thats why i gave my personnal experience but up to you guys to applicate it or no.

Keep on truckin!!!:exp:

#1 -- bad O2 sensor readings do not indicate a bad O2 -- they indicate bad readings. A bad O2 wouldn't read at all, or be off the map.

#2 -- run 0W20 Amsoil for best mileage and protection. Heavier weight oils cause internal drag and lower performance and mileage.

#3 -- Swap to Amsoil in the transmission, t-case, and diffs -- pick up a couple mpg.

#4 -- Use PB Blaster to free up rusted bolts on the EGR. That stuff is as close to a miracle as exists in nature.

#5 -- K&N, ANE, etc., filters are better flowing than Fram.

#6 -- Fords don't like Champion plugs at all... nor Bosch. Switch to Motorcraft double platinum or iridium.

#7 -- Acetone is a short-lived experience. Once everything is clean from the solvent effect, the mileage change won't be as dramatic.

 

[glfredrick]

Right now, I'm from Louisville, Kentucky but I've spent most of my life in central Wisconsin, where temps are much closer to yours year around. I also do a lot of off-roading in dusty and dirty conditions. My recommendations are based on my 35 years of experience personally plus what I've learned over the years as an ASE master tech, race driver, etc.

I do agree about certain conditions in certain areas needing special care, especically in extreme hot or cold conditions, but I've found that some things are fairly universally good, such as good synthetic oil, good filtration, etc.

Oh, and in my off road trucks, I use True Flow filters. I find that they are the best in performance versus filtration. They have saved my bacon a number of times when the air box was submerged...

http://www.trueflow.com/

 

[X-North]

Good for you that you have all the experiences...im sure that the part you use are good for everybody but personnaly i dont see why i should change mine if they work really well even if they low cost.
the most important thing for everyone is to have fun

 

[quicklook2]

i do not believe anyone is trying to convince you to do anything.

if we all gave the same opinion it would be a very boring forum.

 

[X-North]

LOL told like that its sound oppresive
Seriously i dont know why you thinked that i said it so but ...dont worry anyway i think the original post recevied is answer.
Good day

i do not believe anyone is trying to convince you to do anything.

if we all gave the same opinion it would be a very boring forum.

 

[mawrazen]

Update! Finally Got EGR Valve out and pulled codes from most recent trip 1k + miles.

Hello again and thanks for your feedback and help!

Worked on the EX on this rainy day, luckily I was able to use the garage. I'm trying to get the truck ready to tow my boat back to Atlanta from PA. I had some tranny issues on the way up and have since installed a 2nd (High Performance) tranny cooler after the stock one and radiator pass through. Driving over the Appalachians in VA will be the ultimate test. Please pray for me.

Work done today on my EX:

Reinstalled the wire harness to my bad brake sensor after removing it and cleaning a lot of grime off it.

Got the EGR Valve off after much effort, some Liquid Wrench, Freeze Off and finally a bottle of Air duster turned upside down to freeze the bolt on the Lower Manifold tube, I was able to finally get the rusted nut off!

After that, the EGR install was fairly easy.

Reset TPS .96 Volts DC from the previously obtained .97 Volts DC

Next I pulled the codes stored in PCM:

Here they are:

513 (O) Replace processor (PCM) (internal failure)

117 (O,M) ECT sensor is/was low or grounded - ECT (NEW ONE!)

What is the ECT sensor?

172 (R,M) Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control

176 (M) Oxygen sensor not switching - system is or was lean Left or Front HO2S - Fuel control

542 (O,M) Fuel pump open, bad ground or always on - - Power / Fuel Pump Circuits

Next I reset the computer and pulled codes again.

513 (O) Replace processor (PCM) (internal failure)

Then went for a 10 min. drive towing my 3450 lb Boat plus trailer up and down some serious hills to test the brake sensor I had cleaned and give the PCM an opportunity to relearn the driving characteristics while towing and still got the 513 code.

Do I need a new PCM?

I will re post my stats when I arrive in ATL. I got about 10 MPG (While towing) on the way up I hope to do better going down south.

This should be a good test for the new EGR Valve and added tranny cooler. I hope it all works out.

Wish me luck!

 

[glfredrick]

Make sure that you tow in 3, not OD!

You probably don't need a new PCM. They will throw that code for a couple of reasons...

First, because they have not fulfilled a drivability loop long enough to reset the computer.

Second, because of a shorted wire or bad connector somewhere.

Generally, when I see a PCM that is still making adjustments and giving readings, it isn't bad. No gaurantee, of course -- they do fail, but more typically it is one of the above.

Snap On publishes a guide for checking the pin outs on the wiring harness that comes in handy for diagnosing issues like yours. Lists the volatage on each pin, and where it is coming from so you can diagnose with a digital vom or Vantage.

 

[mawrazen]

What damage can I do if I tow in OD?

It was the only gear that didn't overheat the tranny and spill fluid onto the exhaust in my 850 mile tow to PA.

 

[Fordmandan87]

ECT = Engine Coolant Temperature

 

[Maniak]

Towing in OD can break the OD band (I beieve thats what its called).. I've actually snapped the sun gear twice..

I could have sworn that the a4ld would lockup the converter in 3rd (not just OD).. If its locked then the transmission should not be getting hot and spewing out fluid..

I "think" there might be another issue, OR the computer isn't telling the converter to lockup (the lockup is electronically blocked by the computer until it thinks it should be locked)

~Mark

 

[mawrazen]

Code 513: Is the MB PCM compatible w/ NB? I can get 1 for $50.

:roll: I went to the local boneyard and found a 1994 EX Eddie Bauer just like mine But a 4x4. (Mines 2wd) I pulled the PCM but didn't pay for it yet. (Left it at the counter)

I,ve only got a few hours to find out if its Compatible with my 2wd EX before I leave town!

The piece I pulled is from the same year EX but with 4wd mine has 2wd. The new one has a UMP1 on it verses VET1 on mine the last 2 digits the units are MB vs. NB on mine.

Will this unit work in my truck?

Should I get this unit? I hear a new PCM can make a big difference?

Help! I need to find out quickly!

 

[mawrazen]

The new PCM (ECU) works!

I had been getting a 513 code. (Faulty pcm) I picked up a PCM at the boneyard from a similar truck, both 1994 Eddie Bauers. The model numbers were different and the new one cam from from a 4x4. The manager assured me it should work and let me test drive the unit before purchasing. All seems well.



I also picked up a 12 volt fan that I installed behind the grill infront of the stock tranny cooler and radiator.

I will be driving back to Atlanta today, I will keep Y'all posted.

 

[huntman58]

What damage can I do if I tow in OD?

It was the only gear that didn't overheat the tranny and spill fluid onto the exhaust in my 850 mile tow to PA.

Old post I know but incase any one searching finds this it’s why I am adding to it.
Towing in OD at lest from my experience is a good way to get a new or rebuilt tranny some time soon down the line. I did not know this and over time once towing a trailer (biggest enclosed U haul had and when they rented to explorers) from Idaho to Calif. a few month later yup was replacing the tranny then when I moved I again rented and towed a big trailer with a heavy load in OD and same thig some months later stop at a stop sign and it would not move from there. Not a sound or hint any thing was wrong to that point. so yes do not two in OD as I also have a brother in law who did the same with a Chevy suburban and a large travel trailer and he also replaced his tranny a few times before replacing the truck only he did not learn and next truck did it again so may be now he will change but I have a feeling he will not as he believes its an auto tranny it knows what to do LMAO!