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Thanks Alan. The pumps are less than 3 years old. Is there a screen in the p=
umps that could be blocked?
Price Lindsay
630-841-6300 Cell
Sent from my iPhone
> On Jun 13, 2015, at 9:30 PM, Alan Seigrist <healey.nut@gmail.com> wrote:
>=20
> Price -
>=20
> Try using compressed air to blow backwards through all your various fuel p=
oints, starting with the floatchamber lids.
>=20
> The only other thing I can think of is your fuel pump is not pumping with e=
nough pressure. Suggest taking the line off the carb and turning on the ign=
ition and see how fast the fuel flow is. If it's a low stream of fuel that'=
s your problem, may not have enough pressure to unseat the float chamber nee=
dle.
>=20
> Alan
>=20
>> On Sun, Jun 14, 2015 at 6:54 AM, R. Price Lindsay <050.rpl@gmail.com> wro=
te:
>> I=E2=80=99m sorry to come back to you with my issues but I=E2=80=99m out o=
f ideas. =20
>>=20
>> I believe it is a lack of fuel to the rear carb. The miss/backfire is al=
ways from the rear carb and down stream in the exhaust pipe serving the rear=
cylinders. I have used a Colortune to try and tune the carbs. It works fi=
ne on the front carb but I can=E2=80=99t even get a yellow color or see anyt=
hing in the viewer except when it backfires. I haven=E2=80=99t found the fu=
el choke point. I=E2=80=99ve taken the floats apart and found some crud and=
cleaned them out. I=E2=80=99ve removed the jet from the rear carb and clea=
ned a very small amount of crud from it=E2=80=99s base. I=E2=80=99ve set th=
e float bowls at 5/16=E2=80=9D and the needles work fine. Fuel flows freel=
y from the front carb. The only remaining point I can think of is the passa=
ge between the float chamber and the jet. I intend to take the carbs off ag=
ain tomorrow and clean/clean/clean.
>>=20
>> Just so you know I have:
>>=20
>> 1. new points, condenser and rotor
>> 2. new ignition cap, wires caps and plugs
>> 3. drained the fuel tank and replaced with fresh fuel
>> 4. tried a different coil - no help
>> 5. set the timing
>> 6. set the tappets
>> 7. checked the needles - they are standard UH
>> 8. verified the needles are seated properly and fall freely
>> 9. removed fuel filter
>> 10. changed fuel lines with new
>> 11. did a compression test - 149, 142, 142, 138, 142, 139 psi front to ba=
ck
>> 12. there is no oil in the coolant
>>=20
>> Thank you so much in advance for whatever light you can shed on this.
>>=20
>>=20
>> Price Lindsay
>> 67 BJ8
>>=20
>>=20
>>=20
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>>=20
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>>=20
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nut@gmail.com
>=20
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Thanks Alan. The pumps are less than 3=
years old. Is there a screen in the pumps that could be blocked?<br><br>Pri=
ce Lindsay<div><div><br></div><div>630-841-6300 Cell</div><div><br></div><di=
v><br></div><div>Sent from my iPhone</div></div></div><div><br>On Jun 13, 20=
15, at 9:30 PM, Alan Seigrist <<a href=3D"mailto:healey.nut@gmail.com";>he=
aley.nut@gmail.com</a>> wrote:<br><br></div><blockquote type=3D"cite"><di=
v><div dir=3D"ltr">Price -<div><br></div><div>Try using compressed air to bl=
ow backwards through all your various fuel points, starting with the floatch=
amber lids.</div><div><br></div><div>The only other thing I can think of is y=
our fuel pump is not pumping with enough pressure. Suggest taking the l=
ine off the carb and turning on the ignition and see how fast the fuel flow i=
s. If it's a low stream of fuel that's your problem, may not have enou=
gh pressure to unseat the float chamber needle.</div><div><br></div><div>Ala=
n</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Su=
n, Jun 14, 2015 at 6:54 AM, R. Price Lindsay <span dir=3D"ltr"><<a href=3D=
"mailto:050.rpl@gmail.com"; target=3D"_blank">050.rpl@gmail.com</a>></span=
> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word=
">I=E2=80=99m sorry to come back to you with my issues but I=E2=80=99m out o=
f ideas. <div><br></div><div>I believe it is a lack of fuel to the rea=
r carb. The miss/backfire is always from the rear carb and down stream=
in the exhaust pipe serving the rear cylinders. I have used a Colortu=
ne to try and tune the carbs. It works fine on the front carb but I ca=
n=E2=80=99t even get a yellow color or see anything in the viewer except whe=
n it backfires. <b>I haven=E2=80=99t found the fuel choke point</b>.&n=
bsp; I=E2=80=99ve taken the floats apart and found some crud and cleaned the=
m out. I=E2=80=99ve removed the jet from the rear carb and cleaned a v=
ery small amount of crud from it=E2=80=99s base. I=E2=80=99ve set the f=
loat bowls at 5/16=E2=80=9D and the needles work fine. Fuel flow=
s freely from the front carb. The only remaining point I can think of i=
s the passage between the float chamber and the jet. I intend to take t=
he carbs off again tomorrow and clean/clean/clean.<div><br></div><div>Just s=
o you know I have:</div><div><br></div><div>1. new points, condenser and rot=
or</div><div>2. new ignition cap, wires caps and plugs</div><div>3. drained t=
he fuel tank and replaced with fresh fuel</div><div>4. tried a different coi=
l - no help</div><div>5. set the timing</div><div>6. set the tappets</div><d=
iv>7. checked the needles - they are standard UH</div><div>8. verified the n=
eedles are seated properly and fall freely</div><div>9. removed fuel filter<=
/div><div>10. changed fuel lines with new</div><div>11. did a compression te=
st - 149, 142, 142, 138, 142, 139 psi front to back</div><div>12. there is n=
o oil in the coolant</div><div><br></div><div>Thank you so much in advance f=
or whatever light you can shed on this.</div><div><br><div>
<span style=3D"border-collapse:separate;color:rgb(0,0,0);font-family:'Times N=
ew Roman';font-style:normal;font-variant:normal;font-weight:normal;letter-sp=
acing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text=
-transform:none;white-space:normal;word-spacing:0px"><br>Price Lindsay<br>67=
BJ8<br><br></span>
</div>
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