So yeah, I bought my Ford Bronco. Finally!

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Indiana
I know a thing or two about that SEFI Ford stuff. Solving the hunting idle by adjusting the TPS , cept it's not made to be adjusted,,,,dremel to the rescue. Run about 15-16 base timing. Adjustable fuel pressure regulator to fine tune what pressure it likes. Block off that EGR and trick the sensor.
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Austin, TX
Okay, so the following issue is now resolved.
But here's the plea for help on the Bronco forum prior to resolving it.

--------

Guys, I really need help with an incredibly stubborn Code 172 & 334.
I suspect the 172 is just a symptom of the code 334.

1994 Bronco
5.8L Windsor
E40D auto
192k miles
No mods that I know of.
Just bought it from a car lot a few weeks ago, issue has been present from day one.


Symptoms I get:

Runs smooth till it warms up.
Then when I stop at a light, the idle might suddenly drop from ~1k down to ~500 RPM and stumble.
Then pop back up to ~1k for a moment, then drop to ~500 again. And occasionally dies.
When this happens, sometimes the tranny will suddenly start shifting at really high RPM's with whiplash effect.


Things I've replaced in the last two weeks:

-EGR Vacuum Regulator Solenoid
-Coolant Temperature Sensor
-Idle Air Control Valve
-Throttle Position Sensor
-Fuel Pressure Regulator
-ACCEL Supercoil
-ACCEL Distributor Cap
-Ford Racing Spark Plug Set
-02 Sensor
-EGR Valve Position Sensor
-Replaced all vacuum hoses
-Cleaned PCV Valve
-Cleaned Throttle Body


Troubleshooting steps I've taken so far:

-Plugged Vacuum tester into EVR top line going to EGR and it held vacuum.
-Plugged Vacuum tester into EVR bottom line going to solenoids and it held vacuum.
-Applied vacuum to EGR while engine was running and the diaphragm moved and engine idle changed.
-EVR 12V pin shows -12V on my multimeter.
-Shorted EVR's pin 33 to ground while engine running and the engine died.
-Applied vacuum to vacuum canister AMP with MAN disconnected. It holds vacuum fine.
-When I do the KOER code test, the EGR does not move.
-Hooking a vacuum gauge inline with canister AMP shows "green" levels of vacuum (good).
-EVP shows 5v at pins VREF and SIG RTN.
-EVP shows ~3700 ohms at pins VREF and EVP and it goes down to ~350 when I apply 10hg vacuum to EGR.
-Disconnected IAC. Applied vacuum to EGR and engine RPM's stumbled as expected.
-Put Vacuum tester inline at EGR and raised engine RPM's, the vacuum does not register anything at all.
-I have yet to see the EGR move except for when I manually apply vacuum to it.

I'm sure I've forgotten a few things.
Any and all help would be appreciated!
If there are any sensors I should try replacing, then I can do that too.
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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And now for the fix. And yessir, I no longer pull ANY codes on my Bronco except for "111" which means "all is good, muthafucka".
A guy called out the EVP, saying the aftermarket stuff was rubbish.

-----------

I cannot believe it, but you were RIGHT.
That stupid freakin dorky tater tot silly EVP.
Both the old brand-new one AND the new-new one that I bought, were DEFECTIVE.

I shaved a tiny bit off the end of the pintle (thank you Bench Grinder).
Put it on the EGR.
Ran the OBD1 test.
No codes.
No codes.
NO CODES.
Just 111 I loves you. 111 you are free. 111 **** the EGR. 111 time to move on now.

I put the spare old-new EVP on my bench grinder and took off as much metal as you can see in the pics below.

3rd pic is where it was before I touched it.
2nd pic is how much metal I removed from it.

Installed it.
And all is sooooo good.

I mean, pending drive test and all that.
But I'm going to buy the Motorcraft EVP anyways.
Should be here on Monday.

LIFE IS GOOOOOOD AGAINnnnnnnn

60283167_2457007124331838_799827261040623616_o.jpg60360941_2457007410998476_8155444219889057792_o.jpg60644534_2457007274331823_230048863669452800_o.jpg
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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I was spending hours every night researching and trying different troubleshooting steps to resolve this bastard 334 code.
I actually did a dance when I found out it was fixed.
No video, you don't want to see me happy dance.
Nobody wants to see me happy dance. :lol:
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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So, uh... the EGR & 02 sensor codes appear gone for good.
But the same driveability issues continue.
Tranny gets warm and starts shifting above 2K instead of below.
Hard shifts that break your neck.
And random idle issues where it drops to ~500 and sometimes dies.

Next suggestion was to replace the Vehicle Speed Sensor, which I did yesterday with a Motorcraft part. No change in problem.
Next suggestion after that is to get your PSOM (programmable speed something something) replaced. The VSS sends its signal to the PSOM which is the electric board behind the speedo. Then the PSOM sends that signal to the PCM.

Lost my train of thought.
Next door neighboors who lost their son & daughter in the last five years and now take care of their grandkids, just brought over the one who turned four y/o today. I guess they went bowling for his bday.
He got puppy kisses from my dog Ghost and that made his day.
Well made him happy anyhow.

Oh yeah.
So while this section of dash is pulled out, I'll be replacing instrument cluster bulbs with LED's and doing some cleanup.
What's a good way to deep clean the a/c/heater ducting?
Not the vents, but the ducting. Some kinda brush with vacuum attachment?
Turn on the a/c full blast and use a drill attachment brush?
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Still shifting hard. I'm going to go buy a new/used PSOM board early this week from a local yard.
The forums all say that's a likely suspect.

And still dying when I come to a stop.
I'll get the shifting issue fixed first and hope it fixes the dying issue.

Also going to replace my tranny fluid & filter. I read that a "dropped filter" in the tranny could cause similar issues.
And I think my tranny fluid is too high also. When I got the Bronco, an occasional puff of smoke would come into the cabin while driving.
Discovered the tranny dipstick wasn't on tight. Been fine since then. No more random puffs of smoke.
But the fluid bubbles are up into the crosshatch area on the dipstick.
$100 shipped for Motorcraft Mercon V synthetic 24 quarts :eek:
I only need 16 quarts but will use the rest for an eventual power steering pump/etc. replacement.

Today I replaced the crappy old ignition cylinder and door locks!
Used to be I had to use one key for ignition and a different key for the doors.
And all three had issues where I'd have to monkey with it to get them to work.
Got an all-in-one single key & cylinder set off eBay for $95 shipped.
And it was waaaay easier to install than I ever suspected!
I could do all three in 10 minutes if I had to do it all over again.
How-to videos are on YouTube.
s-l1600.jpg

Now I've got the rear end up on Gorilla ramps and I'm changing the engine oil & filter.
The rear end is a little higher than I'd like for checking oil. Bronco is at a slight angle even after dropping the rear tires to 10lbs.

Then heading out in 90 minutes cuz Lurch is taking us to see ZZ Top/Bad Company/Cheap Trick at COTA.
 

sailUSVI

Tripping on the road and buying stuff
Joined
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Messages
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Location
Texas
“Then heading out in 90 minutes cuz Lurch is taking us to see ZZ Top/Bad Company/Cheap Trick at COTA.”

That sounds like a good time, go up the tower :cool:
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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I have stalker video of GrkGrrl GrkGrrl bouncing to music.
But I'll just leave this here for now.
The opening band, Cheap Trick.
At like 6PM.
Not even Bad Company or ZZ Top yet.
This was about an hour after I got the oil changed in my Bronco.
1558330908892.png
 

Hapo

Dog Boy
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...yea, well, that was never a concern of mind...:confused2:

...are you asking for a freind…???...:ducmanic:
 

GrkGrrl

soul-destroying, feminazi, castrating Dyke Bitch
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My Own Little World
You guys are funny! No third wheels here, no one is dating anyone, nothing to gossip about!, We all went out as a group of friends! I am here in Austin picking up a new to me track bike; the concert was perfect timing!!
 
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rumble phish

BAMF+
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Messages
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Location
Modesto, CA
Oh yeah.
So while this section of dash is pulled out, I'll be replacing instrument cluster bulbs with LED's and doing some cleanup.
What's a good way to deep clean the a/c/heater ducting?
Not the vents, but the ducting. Some kinda brush with vacuum attachment?
Turn on the a/c full blast and use a drill attachment brush?
Careful throwing LED's into a vehicle that wasn't designed to use them....
 

BilletMan

BAMF+
Joined
Dec 29, 2001
Messages
19,616
I suspect you're eyeing up Austin as a place of residence....maybe I'm way off, just speculatin....

You guys are funny! No third wheels here, no one is dating anyone, nothing to gossip about!, We all went out as a group of friends! I am here in Austin picking up a new to me track bike; the concert was perfect timing!!
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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1558393805418.png

1558393924543.png

1558393965955.png

1558394031127.png

As promised, bouncing.
It's a private YouTube so there ya go.
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Hope that fixed it?

And for this one... guess what I'm about to do.
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Tearing the ductwork in bronco up?
Let’s us know will ya
So yeah, you got it!
I had to pull the dash console and driver-side plastics to get access to the PSOM, which arrives tomorrow morning (refurbished, tested, etc).
It'll have my mileage and CAS tire size programming.

Before I put it all back together, I needed to clean the 24 year old air ducting.
This thing has never been cleaned before, I'd guess.

Here's part one of a few vids.
I'll be back to post more, including some in'n'out action scenes! :eek:
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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This is what I bought to do the cleaning with.
A nice fat 4" Dryer Duct Cleaning Brush (also available at all Home Depot) for $20.
If I were to do it all again, I'd also get a 2" brush for small corners/crevices behind the dash.
Places other than the ducting itself.

Amazon product
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Final short video.
Behind the gauge cluster.
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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C'mon, Man. Don't buzzkill my new tool purchase :D

Oh yeah, I replaced the PCV valve today too.
With a Motorcraft.
It was behind the #4 cylinder and kind of a PITA to get to.
I had actually cleaned the original one.
But noticed the new Motorcraft was only $5 so I said fuggit.
#consumerpower
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Dusted the gauge faces with a soft bristle Toothbrush.
Then wiped them down with the 303 protectant that BigGar always talks about.
Also used some 3M lens polish and my DA polisher to remove some scratches from the cluster lens.
And followed that two step process with car paint polish and the fine pad on the DA.
Really happy with the results.MVIMG_20190520_213004.jpgIMG_20190520_213648.jpg
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Replaced the five primary cluster bulbs with white LED's.
I left the warning light bulbs alone because who wants those to be brighter.
I'm not one of those people who sets the dash light brightness and never touches it for the rest of time.
I adjust my light brightness routinely depending on my mood.
When I want a relaxing drive? I set the brightness way down.
Otherwise, I usually have it way bright.

It was $8 shipped for the set of LED's.
I've got one left. A spare I guess!
Amazon product
IMG_20190520_215907.jpg
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Hmm, reading the reviews indicates that could be a thing!

------------

Please see the pictures that I have shared. It will give you an idea what you will get.
Please note: These are polarity sensitive.
In other words, if it does not work in one orientation try rotating the bulbs and once +/- match the LED bulbs light up bright white
.
It is more economical than purchasing from local auto stores and it is about time to get rid of incandescent W5W bulbs.



 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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Thanks for the heads up!
I'll make sure to test before I bolt the entire dash back up again. :up:
 
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CZLoco

CZLoco

artist formerly known as quad destroyer and...
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I thought about changing the color of my dash lights by using colored LED's and whatever other tricks there are to change colors.
The write-ups look easy enough.
But you know what, I'm actually a fan of that old stock Ford green color.
 

BigGar

high on placebo
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I've never cleaned the ducting on a vehicle that I can remember. I might have stuck a garden hose down the ducting before and flushed the fuck out the system. It'll dry eventually. . . That brush looks absolutely useless. Are the LED's you bought dimmable? I'm always fucking with the brightness on the cars I drive too Eddie. Nice job on the gauges and lens!
 

hagrid

Human sized Loofah Pouf
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LED

Light Emitting DIODE

Diodes are the check valves of the electrical realm.

What happens when you install a check valve backwards?
 
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