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The 1984 Bronco:
The Bronco was the first 4x4 I ever had. Unfortunately, on the move from Dallas back
to the Seattle area, I was T-boned by a Ford Explorer in New Mexico, and the Bronco was
totaled. (By the way, the Explorer must be one tough truck; it was able to drive away
just fine.) I've re-worked this section to make it the now-appropriate past tense. I'm
leaving this page up, as I've been told that some of the troubleshooting that I've got
listed here has helped out a lot of other folks.
Currently, I'm looking for a replacement for the Bronco. I'll create
a new section of this site for whatever truck I get.
Statistics:
When I transferred from North Carolina to Texas in 1997, I only had the Thunderbird.
I wanted keep some of the mileage off of it (I was putting about 14,000 miles a year on
it), and I wanted something that I could go camping in, as I hate throwing that wet, muddy
tent in the back of a nice car. Therefore, I started cruising the used car lots looking
for something like a little old Nissan or Mazda 2WD pickup. One Sunday, I found this old
tan Bronco at a Cadillac dealer in the very back corner of the back lot behind a few
rows of other cars (get used to this theme with me). No two of the five very bald 29"
tires matched, the rear window wouldn't work, the speedometer was dead, and it had some
good sized, yet simple, dents. However, the 4WD worked, the engine ran well, there was no
rust at all, and the only scent in the interior was the vinyl being hot. I had worked at
a car dealer as a kid, so I knew how to read the dealer marks on the windshield. This
Bronco, for which they wanted $5000, was going to auction the next day. I went home,
called Dad, got his opinion, and went back to the dealership. I offered the dealer folks
$2500, reminded them about the auction, and got the Bronco the next day after they re-did
the brakes. After about another $1100 for tires, rear window gears, a tie rod piece,
tune-up parts, and a speedometer and cable (oh, $300 of that was the insurance deductible
for the surgery to put my hand back together after I installed the window gears), I had
a great daily driver and camping rig.
The backyard autopsy revealed that the mechanical fuel pump (less than one year old)
had pumped almost a full gallon of gas into the oil. ("Gee, I changed the oil
yesterday, and now it's thinner than water and more than three quarts high!")
This, combined with darkness, fog (we could've been on fire and I wouldn't've seen the
smoke) and 75mph, caused both engine heads to crack. No, that's too mild of a word. Break
is a better word. Small pieces were missing from between cylinders. The compression was
so far gone that I could turn the engine over by grabbing the crank pulley with my hands
and rotating it in either direction. I could hear the air hiss about inside the engine
from one cylinder to another. Thank the Lord God above that we didn't have a major
explosion that night.
I found it was cheaper to get a rebuilt long block engine than it was to purchase just
the rebuild parts. It was an even better deal, once I saw that I'd need new heads, in
addition to the machine work. Also, I got a 12-month warranty on the rebuilt engine.
After putting the new engine in, I couldn't get it to fire. I was sure the distributor
was off, as that was the one part I was the least sure of that I had put in correctly.
I messed with that thing for a week. Got to the point where I can pull, align, and
re-install a Ford distributor in less than one minute. Then, one evening, I got to
thinking (dangerous for those of us with a Y chromosome). With all the cranking I was
doing, why wasn't I smelling any gas? The carb was dry. So, I squirted in a little
starting fluid (I have no idea why I didn't think of this before, so don't ask). The
engine fired for two seconds. I tried it again, to be sure it wasn't a fluke. It fired
for two seconds again. I checked the fuel line. It was dry. I knew that there
was at least 20 gallons of gas in the tank. I pulled the fuel pump and tried it by hand.
My brand new fuel pump was toast. I rushed back to the parts store before they closed,
got another pump, and put it in. The engine turned over twice and caught. The timing needed
some fine tuning, so it was idling a bit rough, but it WAS finally running.
Note: My neighbor lady thinks I'm nuts, since at this point, I was dancing around
in my back driveway, going "Yeah yeah yeah yeah yeah!".
Now that the beast was running again, it was time to take it in for the pollution inspection I
missed while it took me the month to get the engine taken care of.
Dallas County allows only 200 ppm of HC. I was throwing out over 2500 ppm (the sniffer
machine doesn't read any higher). At the recommendation of the kid running the inspection
booth, I revved it up. At about 3500 RPM, this loud, well, farting noise and a
big black cloud came from the back of the Bronco. The HC reading dropped rapidly and
held at 120 ppm, well below the accepted maximum. Boy, that kid gave me a funny look.
"What happened?" he asked me.
I shrugged my shoulders. "Must've foundered." (If you don't get it, ask someone who knows
horses.)
Needless to say, the Bronco runs great now.
No matter what I did, I couldn't get the HC readings down below 340 ppm. I finally broke
down and took the Bronco to a local garage to have them look at it. Turns out the vacuum
modulator in the transmission was leaking. This was allowing fluid from the transmission
to be sucked into the engine, thus lowering the transmission fluid level (causing the
shifting problems) and causing the engine to blow a high HC level.
I never would've found this one myself. I was starting to save money for a transmission
rebuild, which probably wouldn't've fixed the problem, as a lot of rebuilds don't replace
that modulator.
One nice side effect; my mileage went up about 15%.
So, I went and got another mechanical fuel pump. However, the hard line fitting wouldn't
quite stay; I could tighten it by hand, but the moment I used a wrench to turn that last
little bit, the fitting would jump a thread. Great. Since the pump is tucked in below the
A/C compressor and behind the power steering pump, it's not like it's an easy place to get
to. Anyhow, I pulled the pump off again, check the fittings and part numbers. The part
number is right, but the fitting seems to be just a bit big.
Also, while I was pulling the pump off, I noticed that the timing chain cover was flexing
as I wrenched on it. (Evidently, the cover flexes enough to allow the pump to walk around
on it's cam, and is probably what's eaten three fuel pumps on me so far.) At this point,
I gave up on mechanical fuel pumps, and bought an electric. It's loud inside the truck,
but it works and it won't dump fuel into the oil if it breaks. Installing the pump was a
bit of a mess, but I did luck out on one thing; while I was looking for a keyed wire in
the fuse box to use to power the pump, I found an empty slot marked "fuel solenoid". The
wire in there was perfect for my purposes.
After an oil change (had to stop and dump the drain pan twice), I tried to start the beast.
After lots of turning over (and jumping it off the Thunderbird once I killed the battery)
and a lot of black smoke blowing over to the neighbor's house, the truck fired up. I let
it run for awhile, then changed the oil again, as there was still a little gas in it, and
the lifters wouldn't pump up enough at idle.
The Bronco gets me to work kinda (it starts running bad AGAIN) for the next week. I
parked it, and take the Thunderbird while I figure out what to do. I'd planned on putting
throttle-body-type fuel injection on it, but really didn't want to invest the bucks right
at this point, since I'd started a new job, and Christmas was coming. Then, we had an ice
storm hit Dallas. No way was I taking the Thunderbird. The Bronco is my bad weather
vehicle. So, I fought with it and finally got it running, and then fought with it all the
way in. After fighting it on the way home, I took the Thunderbird the next day, and risked
the ice and bad drivers.
I spoke with my dad about the fuel injection. He told me about how my brother-in-law
had talked him into putting an Edelbrock carburetor on the 350 Chevy in his motorhome.
This sounded interesting. I checked it out, and found that the Edelbrock 1406 is 50-state
emission legal, and would fit. And, at $200 bucks, is a lot cheaper than the $350 for a
rebuilt Holley, like the one on the Bronco (which, by the way, I bought as a rebuilt unit
three years ago). Also, the Edelbrock is adjustable; something that the old Holley wasn't,
and changing jets on it is a snap, as it actually just uses metering rods that can be
changed from the top, using a phillips screwdriver.
I also purchased the throttle linkage kit for a Ford with an automatic, and a 1/2"
spacer plate (the linkage hit a boss on the intake manifold), some longer carburetor
studs, and some other small bits and pieces (okay, not all in one shot, but in seven
runs to the part stores). Sure enough, with some adjustment to the throttle cable
assembly, the new carb fit perfectly. Even the air filter fit.
Now, to fire it up. I let the fuel pump run a couple of seconds to fill the line with
gas. Then, I stabbed the gas pedal to set the choke, turned the key, and the beast roared
to life. Cool. Time for a test drive.
All I can say is that this thing has more power, starts better, and idles smoother than
before.
Also, I had an unusual repair to make. Up to this point, pretty much all repairs I've
made to the Bronco have been mechanical or electrical. This was a bodywork repair in the
fiberglass roof, and it was starting to leak.
In the lead photo on this page, you can make out a mulberry tree on the right side. Well,
yours truly was up in that tree, doing some pruning, and klutzed up. I dropped a branch and
put a hole about the size of my finger in the roof of the Bronco. (Lesson of the story:
Don't park your truck under the tree you're cutting on.)
A small fiberglass repair kit from the auto parts store made quick work of the job. Boy,
that fiberglass resin sure set up nice and hard and fast when I let it sit out in the hot
Texas sun for the afternoon. After some sanding, I sprayed on some primer. I'm not sure
how one thing led to another, but a few hours later, we had the entire fiberglass roof cap
masked off and painted Ford Wimbeldon White.
At that point, my plans were to finish the bodywork and painting on the Bronco, as the
roof turned out great, and the rest of the body looks even worse by comparison. I ordered
a replacement right front fender (which I never got to put on before the Bronco was hit
square on the right front fender), and planned on ordering a replacement tailgate. The
paint scheme plan is to paint the rest of the Bronco the same shade of white, and then add
black zebra stripes. I may still go with that paint scheme if I get another Bronco.
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