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I had similar symptoms and an intermittent running poor condition on my
BJ8. After a lot of sleuthing I discovered that one of the vacuum piston
needles was loose and would drop into the jet hole, then get reattached
and lifted out down the road. Wouldn't explain your large puddle of
gas, though.
Bob
On 5/28/2020 4:50 PM, Brian Drab wrote:
>
> About 4 years ago I rebuilt my HD8 carbs and the car has run great
> since then with no adjustments required or made.
>
> I put the car away for the winter in about November last year.
>
> In probably mid January I decided to take the car out. It was a
> gorgeous day and I had to go to the grocery store about a mile away. I
> started the car and it ran fine. I noted that the gas gauge read
> between empty and ¼ . I started of to the store, but I noticed an
> obvious smell of raw gas when I was driving. When I got to the store
> lot, I parked the car, did my shopping, and came back out. When I
> turned the key, I now noticed that the gas gauge moved up to dead on
> empty whi8ch on my car means you are really out of gas!. When I
> started the car, I got about 100 feet when the fuel pump started
> hammering. I got another couple of feet and the car ran out of gas.
> Fortunately, I was just across the street from a gas station so I took
> my trusty gas can, went over and filled it, then came back and poured
> it in the gas tank. The car started up fine but began running really
> rough. I went another ½ block into another store, parked the car and
> went inside. When I came back out about 15 minutes later there was a
> pool of gas, about 2-3?wide, under the front of the car. I started the
> car and it barely ran. I literally had to coax it home. It sounded
> like severe fuel starvation ? running barely on about 3 cyclinders.
>
> There was no more smell of raw gas nor any fuel leak as before.
>
> When I got home, I rapped the top of the float bowls on each carb in
> caser it was a stuck float valve. and it seemed to run a lot better. I
> felt at that time that a float valve had stuck and probably siphoned
> the fuel out of one of float bowls through the overflow tube.
>
> Fast forward 3 months:
>
> Last night I was getting it ready to take it on a bit of a road trip
> today it and when I took it out, it ran very poorly ? again like fuel
> starvation but not as bad as before. It also popped back through the
> carbs frequently which I interpreted to be a very lean mixture
>
> I did the following:
>
> put another 3 or 4 gallons of gas in the tank
>
> Took the float bowls apart and cleaned them out ? there was a bit of
> sediment in them but nothing worthwhile. I also checked the floats
> which were both leak free. I also cleaned out the float bowl filters
> at the in line.
>
> I checked the Gros float valves and they seemed to work properly ?
> held upside down, they closed and opened right side up.
>
> I disconnected the fuel line at the fuel pump and blew air back into
> the tank thinking that when it ran out of gas, sediment in the bottom
> of the tank may have plugged the intake. It blew fine into the tank.
>
> I have 2 fuel pumps on the car ? the regular SU and a facet pump. I
> pulled of the fuel line at the float bowl and turned on the ignition.
> The SU pump and the facet pump each filled a coke bottle pretty
> quickly. I did not measure pressure. The gas looked clear and pure. I
> do not have a fuel line filter.
>
> I checked the plugs all seemed good and were in fact burning on the
> lean side.
>
> I pulled the distributor cap and it was nice and clean inside with no
> sign of carbon tracks.
>
> I have electronic ignition so there is nothing I can check there.
>
> I checked the timing ? it was right on.
>
> No matter what I did it didn?t make an improvement.
>
> I replaced the Gros float valves but it made no difference.
>
> Today I pulled the carbs (which on a BJ8 is no easy task) I checked
> the diaphrams and both were in good condition.
>
> Now I am stumped. Is it a fuel problem or something else? Can any one
> offer any suggestions?
>
> Brian Drab
>
> Vancouver B.C.
>
>
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I had similar symptoms and an intermittent running poor condition on
my BJ8. After a lot of sleuthing I discovered that one of the vacuum
piston needles was loose and would drop into the jet hole, then get
reattached and lifted out down the road. Wouldn't explain your
large puddle of gas, though.<br>
<br>
Bob<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/28/2020 4:50 PM, Brian Drab wrote:<br>
</div>
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<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">About 4 years ago I rebuilt my HD8
carbs and the car has run great since then with no
adjustments required or made.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I put the car away for the winter in
about November last year.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">In probably mid January I decided to
take the car out. It was a gorgeous day and I had to go to
the grocery store about a mile away. I started the car and
it ran fine. I noted that the gas gauge read between empty
and ¼ . I started of to the store, but I noticed an obvious
smell of raw gas when I was driving. When I got to the store
lot, I parked the car, did my shopping, and came back out.
When I turned the key, I now noticed that the gas gauge
moved up to dead on empty whi8ch on my car means you are
really out of gas!. When I started the car, I got about 100
feet when the fuel pump started hammering. I got another
couple of feet and the car ran out of gas. Fortunately, I
was just across the street from a gas station so I took my
trusty gas can, went over and filled it, then came back and
poured it in the gas tank. The car started up fine but began
running really rough. I went another ½ block into another
store, parked the car and went inside. When I came back out
about 15 minutes later there was a pool of gas, about
2-3?wide, under the front of the car. I started the car and
it barely ran. I literally had to coax it home. It sounded
like severe fuel starvation ? running barely on about 3
cyclinders.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">There was no more smell of raw gas
nor any fuel leak as before.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">When I got home, I rapped the top of
the float bowls on each carb in caser it was a stuck float
valve. and it seemed to run a lot better. I felt at that
time that a float valve had stuck and probably siphoned the
fuel out of one of float bowls through the overflow
tube.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">Fast forward 3 months:
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">Last night I was getting it ready to
take it on a bit of a road trip today it and when I took it
out, it ran very poorly ? again like fuel starvation but
not as bad as before. It also popped back through the carbs
frequently which I interpreted to be a very lean mixture
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I did the following:<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">put another 3 or 4 gallons of gas in
the tank<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">Took the float bowls apart and
cleaned them out ? there was a bit of sediment in them but
nothing worthwhile. I also checked the floats which were
both leak free. I also cleaned out the float bowl filters at
the in line.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I checked the Gros float valves and
they seemed to work properly ? held upside down, they closed
and opened right side up.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I disconnected the fuel line at the
fuel pump and blew air back into the tank thinking that when
it ran out of gas, sediment in the bottom of the tank may
have plugged the intake. It blew fine into the tank.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I have 2 fuel pumps on the car ? the
regular SU and a facet pump. I pulled of the fuel line at
the float bowl and turned on the ignition. The SU pump and
the facet pump each filled a coke bottle pretty quickly. I
did not measure pressure. The gas looked clear and pure. I
do not have a fuel line filter. <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I checked the plugs all seemed good
and were in fact burning on the lean side.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I pulled the distributor cap and it
was nice and clean inside with no sign of carbon tracks.
<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I have electronic ignition so there
is nothing I can check there.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I checked the timing ? it was right
on. <o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">No matter what I did it didn?t make
an improvement.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">I replaced the Gros float valves but
it made no difference.<o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:0cm;margin-bottom:.0001pt;line-height:115%">
<span style="color:black">Today I pulled the carbs (which on a
BJ8 is no easy task) I checked the diaphrams and both were
in good condition.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Now I am stumped.
Is it a fuel problem or something else? Can any one offer
any suggestions?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Brian
Drab<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Vancouver
B.C.</span><o:p></o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
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</pre>
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