I had put out a question as to a fuel related issue basically my D100 runs sweet
then shuts down I have to prime carb to geter going once more & from that point it may go 10 miles or 2
It decides . I original thought that the gas treatments I used fixed it but it ended being a false alarm
I have fixed some issue like leaking fuel lines that cured a symptom but the did not correct the main issue
I have a new fuel pump ready to install BUT I don't think its the issue
Once it is stalled out if I look down carb I see it is putting in fuel so I figure fuel pump is working and carb it self has fuel in it
When I put gas in to carb I see carb does leak some fuel at linkage I suspect air fuel ratio is getting messed up
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So if I change out carb would now be the time to retrofit D100 away from the Lean burn Air pump not to mention different type of ignition ,

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Rediscovering what has been forgotten by many
the slant 6

What year truck? Is it a 2bbl or 1bbl? Have you adjusted the valve lash (if it is a pre-1981 truck)?

Lou

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Home of Slant6-powered fun machines since 1988

1986 with 2 bbl
It's kinda baffling to me , cuz when it is running during the select moment's
it feels perfect but regardless it's just a matter of time from 10 min to 20 ,
but it will happen , it dies like running out of fuel
Yet when pulled to side of road
there must be fuel in carb cause I work throttle and I hear fuel sizzle in with each pump
BTW choke is not blocking no vacuum leak's noticed
but yesterday I noticed it sounded like too much air like a Hiss SHHH sound then out
easy to restart just prime in a little fuel & off to the races once more till repeat like I said 10 min to 20

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Rediscovering what has been forgotten by many
the slant 6

After advice of no value from many , particular since even a 1986 slant with carb is becoming foreign to
many at auto parts stores . Ya know you have to figure it your self as no computer telling what's up .
So after using the Dodge many thousands of miles in a cantankerous state Meaning it would run out of fuel and
I would have to prime it with fuel or starter fluid to get off and running once more . It was fine till it would act up.
The auto parts stores wanted to sell me a Carb . But I figured since i could just use as is , in time I might figure it
Cause things were not Adding up as a carb problem (when it ran it was Fine )
I figured the place to start is towards fuel tank . . I replaced some rusty and leaky lines ( but did not correct )
new fuel filter ( Not the issue ) .new fuel pump ( Not the issue ) So now I knew No gas line breach no clogged filter
or malfunctioning fuel pump Hmmm
So I drove it and let it stall out good and strong . And it occurred to me , if it is a bad carb the fuel filter should be FULL
especially since all the work I just did BUT the fuel filter was empty . wow no fuel getting to carb .
Has to be the fuel pick up line INSIDE tank There is the breach .
I filled tank and so far no more stalling . I suspect below half full is when the Fun starts

I am impressed SEE my dodge Dakota rear axle is bust so the D100 was all I had to get to work I used it in messed up mode & you know it got me to work in increments of 10 miles or so & for all the dousing carb with raw fuel
to restart . The Slant 6 is a real work horse able to really handle abuse Running as happy as can be nowAfter advice of no value from many , particular since even a 1986 slant with carb is becoming foreign to
many at auto parts stores . Ya know you have to figure it your self No computer telling what's up .
So after using the Dodge many thousands of miles in a cantankerous state Meaning it would run out of fuel
I would have to prime it with fuel or starter fluid to get off and running once more & it was fine till it would act up
Auto parts stores wanted to sell me a Carb . But I figured since i could just use as is that in time I might figure it
Cause things were not Adding up as a carb problem . .
I figured the place to start is towards fuel tank . . I replaced some rusty and leaky lines ( but did not correct )
new fuel filter ( Not the issue ) .new fuel pump ( Not the issue ) So now I knew No gas line breach no clogged filter
or malfunctioning Hmmm
So I drove it and let it stall out good and strong . And it occurred to me , if it is a bad carb the fuel filter should be FULL
especially since all the work I just did BUT the fuel filter was empty . wow no fuel getting to carb .
Has to be the fuel pick up line IN SIDE tank . There is the breach .
I filled tank and so far no more stalling . I suspect below half full is when the Fun starts

I am impressed
I'll explain , see my dodge Dakota rear axle is bust so the D100 was all I had to get to work I used it in messed up mode & you know it got me to work in increments of 10 miles or so & for all the dousing carb with raw fuel
to restart , the Slant 6 is a real work horse able to really handle abuse .
For now it is running like nothing happened . Soon enough I will take fuel tank down to correct it
maybe next month for now just Keep it full of fuel

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Rediscovering what has been forgotten by many
the slant 6

I had a 72 D100 with the cab tank. One day, as I was putting a bottle of gas treatment in it, I accidently lost the little foil bottle seal into the tank. I didn't think much of it until my truck would begin to mysteriously stall from fuel starvation at completely random intervals. It took me forever to discover that the little foil disk was getting sucked up against the end of the fuel pickup tube (no filter sock on it). Once I was able to retrieve the dang foil thingie, my problems went away.
You may not have this problem, but you will likely need to think outside the box to figure it out.
jus sayin

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-MattMan
LEANED & MEAN

Since I replaced some of the metal fuel pipe with rubber hose
I put in a fuel filter before the fuel pump ( A filter for the 1980 has no fuel return outlet to tank )
I am not excited to pull tank down but I'd like to know I can run my fuel tank down with out the stalling
Since the truck is not a show truck I could carefully cut a square at point of importance
and fix with tank in place but Even I have a love for this old Bugger and I don't want to jimmy
rig fix , ill have to see.
These trucks have that Core good old fashion operation (to a point)
that on a sunny day with no one around , you can get in the ZONE
and often figure out what's up with common sense
can be rewarding compared to modern stuff that you just
toss towel in with disgust

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Rediscovering what has been forgotten by many
the slant 6

I had to pull the tank on my 86 D-150 to fix the fuel sender. When I pulled the sender/pickup, I found a previous owner had put a piece of rubber hose on the metal line of the pickup/sender. Evidently the line had developed a leak. If that was the case it could act like you describe.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Yeah the sender - The breach is higher up then I thought once I use about 4 to 5 gallons issue starts (like clock work )
With a full tank sooo sweet
https://www.ebay.com/itm/81-87-Dodge-D- ... SwJ01be0la

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Rediscovering what has been forgotten by many
the slant 6

My response answer is 6 years coming . My years to consider with delayed understanding , IT'S ME FOR SURE
Putting extra fuel filters would make no difference AND yes I do remember putting in some marvel mystery oil
& remember a piece of the silver disk had also fallen off , I remember that moment & sure enough within one days use the issue started , fuel starvation . Tank removal is out of the question . Id have to cut a square out from the floor of Pickup Bed. I hate to harm authenticity of bed , but heck the bed is beat up flapping anyway
I'm going to test the theory by temporarily rerouting current fuel pick up line and feed the fuel pump direct from a gallon container
Thank you

This slant 6 dodge is a testament of being a part of my life generationally
for now my truck and me are still here with vitality to keep trying
& never give up .

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Rediscovering what has been forgotten by many
the slant 6

I'll admit I didn't read the whole thing but I did see that you have an 86 with a 2 bbl? By 86 they had "taken away" the 2 bbl option again from the factory..I think.

If it's got a 2 bbl alert make sure someone didn't undo the lean burn already and just left the old hardware ((computer, etc) "just hanging there".
Does the distributor have a vacuum advance? Wires just randomly "hanging"? Oddball splices?

It has the 1 bbl but yes it has a wire just dangling ( a rubber Female connector ) yes to non factory splices and other assorted non connected , still it ran well for some years as such . As time has passed my D100 is a 1986 or 1985 insurance says 85 original seller told me 86 .
Fuel starvation is my issue as I have to Prime carb but does run strong after priming
My plan is to test for blockage at fuel pickup to confirm not the problem
Then Id figure i need convert my motor to pre 1978 status , too many what if scenarios ....
Simplifying this motor seems a good direction . One thing i have confirmed I can coax it to run and it's strong
that's a good foundation .
O'Reilly auto store has a 1975 1bbl & distributor items at great prices
.

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Rediscovering what has been forgotten by many
the slant 6

Why is that? I know this is old but it sounded like you still had the lean burn ignition on it? If so I would can that ASAP. They were notorious for causing poor running problems from almost new.

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

And I wouldn't be cutting a hole in the bed. No way. Either unbolt the bed or drop the tank. For one thing it's too hard to guess *exactly* where, meaning you'll have to keep cutting til you get exactly "there", and what would you patch it with... A piece of bed floor out of another one so you can overlap the hole you cut? Then you run sheet metal screws in and poke the tank...

for another thing, if you Nick the fuel lines there's too much risk of a fire
kaboom.... You're dealing with gas.
And if you're having to prime the carb it's a supply issue not a carb issue. A new carb won't get gas any better than the one you have.
Id be interested in what all those hanging wires were.
And as far as a year the 10th digit in the vin will tell, but alot of 86s were built before calendar year 86 began.
It really doesn't make much difference in this case as the 2years weren't much difference mechanically. The grills did change between those 2 years but otherwise they're the same truck.
And who knows, someone could have swapped the grills over the years... (To be exactly right they'd have had to swap the core supports moved the headlight buckets haha) so unless it's been wrecked that's doubtful.

I think your correct I need preserve truck with responsibility & not cut holes to fix .

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Rediscovering what has been forgotten by many
the slant 6