Rusty
Today I finally had time to check out why Rusty was idling so poorly. It had gotten so bad that I had to put it in Neutral and give it some gas to keep it running at a stop. So I pulled the top to the E'brock to see what kind of junk was in there, even though I run two filters in the fuel line. Sure enough, the driver's side had a piece of something in the bowl, as shown in the picture. It is ~ 3/8" long and was right by the main jet, so my theory was that it was covering the jet and causing problems. However, after putting it all back together nothing had changed. I still had the idle stop screw turned in at least a turn from where it had been before I moved the engine to Rusty, and the idle was still awful. And, the exhaust stank.
OK, time for a little tuning, so I put the vacuum gauge on and found something like 13" of vacuum.
At that point I wondered if the timing had gotten bumped, but it is still sitting on 16˚ BTDC. Then I played with the idle mix screws and everything got better the further I screwed them out - until they fell out of the carb, at which point the engine died. And even just before they fell out the vacuum was only 14", so there was some problem in the idle circuit.With the screws out I pulled all of the vacuum lines off and put 100 PSI air to each fitting and idle screw hole. (Try that with your Holley!
) I put the idle screws in, preset to 2 1/2 turns, connected all the vacuum lines, and started it. Wow! It was like the fast idle was stuck on high! I took over a turn off the idle stop screw and it was still running at over 1000 RPM and 20" of vacuum. Got the idle down to 600, turned the idle mix screws IN, and the best vacuum turned out to be 17 - 18", right where it was before I moved the engine from Dad's truck to Rusty. Problem solved.
So, what's been done? Here are a few things:
- AFR gauge: I installed my new AEM Wideband AFR gauge, which not only records AFR but also RPM and manifold vacuum.
- Tuned carb: Using the AFR meter I determined that the carb wasn't right, so rebuilt it. Then I found that once right it was too rich at cruise as well as WOT, so changed the jets as well as rods to dial it in.
- Transfer case: The NP208 was leaking from the region of the shift detent, and I initially thought a gasket was leaking. But, after cleaning that area I determined that the case was cracked. So I swapped the t-case out for the one that I had rebuilt.
- Tires & wheels: I really don't like the whine of the heavy-lugged tires that were on Rusty, so swapped them with the lighter tires on aluminum wheels that are destined for Dad's truck. That quietened things down so much that I then could hear many rattles that had previously been masked.
- Passenger's door: One of the worst areas for rattles was the passenger's door. So I pulled it apart and found the storage bin wasn't screwed on well, the lock linkage wasn't attached and rattling, and the window run was so hard and broken that it allowed the window to rattle and wind to come in. So I replaced the window run with a new one, attached the lock linkage, and cleaned up the nasty storage bin and screwed it down. Now when you close the door it is so tight there's no rattle.

Here's a shot of the panel after I painted it. Unfortunately I don't have a shot showing what it should be, but this just isn't right. And, there are nubs sticking up in many places. So, I guess it is time to get the right paint, sand it down, and paint it again.
But, I do have two cans of what I think is the right SEM paint on its way so maybe next week, just before the GTG, I can get the panels painted. In any event, the doors shut sooooo much better with the windows not rattling due to the brick-hard runs - and the runs were only about 2/3's there as many pieces had broken off. I'm sure that driving it will be that much better as well - as soon as the temp goes down enough to drive with the windows closed.
Anyway, here's the driver's door showing the contrast in colors. And, yes this pic makes the door panel look quite different than the previous pic did, but trust me - this is much closer to what it really looks like.

The early model has a tab on the bottom that goes into a bracket that screws to the fender. But the later model has a pin - in a different location. If you are smart you get the bracket along with the reservoir. But, if you are like me follow along.

Here's a marked-up shot of the bracket showing where I drilled a 5/16" hole to take the pin, which lets the later model reservoir bolt right into the earlier trucks.
And here's what it looks like mounted:
The only other thing is that the outlet for the washer fluid is a larger diameter on the newer reservoir than the earlier ones. But my hose had a step-down about 3" from the reservoir and when I took that off the hose was long enough to fit right on the barb. And, now the windshield washer works and I'm not worried about the coolant hose not reaching the bottom.
My '87 has the coolant in the rear and the washer fluid in front.
Ford Trucks for Ford Truck Enthusiasts
And here's the text entry from the catalog. Unfortunately it omits either the 80/84 single battery usage or the 85/86 bracket so I can't find the true part #. In other words, you'd better get it at the salvage or you'll have to modify yours as you can't order it w/o the #.
And, here's the paint. Turns out SEM's Palomino is a good match for Ford's Code U interior color called Fawn.
Here's the catalog entry again, with the early one in yellow and the later 85-86 version in green. The 87-96 is probably a few lines down. I'll do a search for a new 85-86 reservoir.
EDIT: Rear Counter says none are available at any Ford dealers. Google did give me hits at other locations, but all I saw were for a different #, frequently -B, which is for the diesel. Maybe just what you need, Paul/RW.








