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Mark,
Here's something I wrote a few years ago, maybe it can help;
I always do checks for spark BEFORE I do the checks for Fuel delivery. You
don't want any stray fuel vapors anywhere near an area where you will be
creating a spark.
Note; More than once, I have witnessed an A-series distributor that has
dislodged itself from the hole in the engine block due to a distributor
clamp that was not tightened properly. Checking to make sure the
distributor is held securely in the clamp would be well advised before you
check for other electrical problems.
Another important note; Before you check electrical connections under the
bonnet of your car, MAKE CERTAIN YOU HAVE NO FUEL LEAKS.
To check for spark. First check for spark at the points. Remove the
distributor cap and watch the points while you turn the engine over with
the starter. Make certain the ignition is switched on if you have a
separate switch for the ignition on your car. If you can not see the
points while you are turning the engine over with the starter (you are by
yourself and have no one to help you), switch on the ignition and flick
the points with a small screwdriver (or your finger) to see if you get a
spark when the points are separated. If you have no spark at the points,
check for loose wires to the coil and/or distributor. The problem may be
in the electrical wiring at your ignition switch. You can hot-wire the
coil with a short piece of wire. (I carry a jump wire with alligator clips
on each end). On a negative ground car, connect the jump wire to the
positive side of the coil and to the positive post on the battery and check
for spark at the points again. If you still have no spark at the points,
the problem may either be the condenser or the coil.
If you have spark at the points, - next check for spark at one of the spark
plugs. The easiest way to do this is to remove one of the spark plugs and
with the ignition wire for that spark plug wire attached to the plug, hold
the spark plug in contact with the engine and turn the engine with the
starter. You should see a spark at the gap in the spark plug. If you have
spark at the points but no spark at the plug you may have a faulty
distributor cap or rotor. If you have a spark at the spark plug, it's time
to check for fuel supply. Put the distributor cap back on and re-install
the spark plug. You don't want any stray sparks while you are checking for
fuel supply.
To check for fuel delivery. Disconnect the fuel line at the carburetor and
activate the fuel pump. (On cars with electric pumps, turning on the
ignition will accomplish this. On cars with mechanical fuel pumps you will
need to turn the engine with the starter). If you have no fuel being
delivered at the fuel line you disconnected from the carb, you may either
be; out of fuel, your fuel pump stopped working, or you have a blockage in
the tank or at the fuel filter. Another possibility is a broken fuel line
between the tank and the engine.
Kevin V.
Tuscarora, Pa
ReplyForward
Add reaction
On Sun, Jul 21, 2024 at 8:18=E2=80=AFPM Mark Haynes via Spridgets <
spridgets@autox.team.net> wrote:
> Hey folks,
> I've gotten to the point of asking for thoughts on my new 948 engine.
> The specifics of the new engine are as follows:
> 948 .020, crowned pistons, 12G202 head milled 0.185" (touted to be a Dave
> Tabor head) Rimflow valves (1.25 I, 1.06 E), Vernier timing gear, SPVP3 c=
am
> timed to 102.5 degrees ATDC, Jeff Schlemmer 25D distributor, APT lifters,
> 1.3:1 rockers ,ceramic coated piston crowns and combustion chambers.
> I finally got it installed with the new Gerard Garage 5 Speed, and I have
> spark, Ignition timing is set per Jeff Schlemmer, compression (when
> cranking only) 125 psi in all cylinders, carbs are getting fuel.
> I get no Bang, Pop, Fart,nothing from the engine when trying to start,
> even with starting fluid (checking that it wasn't fuel delivery) or
> rotating the dizzy, I tried swapping plug wires to prove it wasn't igniti=
on
> 180 out or 1 & 4 wrong or 2 & 3 wrong.
> I brought in a friend who's a pro mechanic and he's as stumped as I am.
> I'm looking for any possibilities,
> Just to be sure, this is not even close to my first engine build nor my
> first 948 build. I know how to time cams and build engines, but this has =
me
> stumped and I feel really dumb, so I'm leaning on you all for some though=
ts
> and support.
> God, I wish Frank were still here, he'd have the answer in a flash.=F0=9F=
=A5=BA
> TIA,
> Mark Haynes
> It only goes one way- Pay It Forward
> ------------------------
>
> spridgets@autox.team.net
>
> Donate: http://www.team.net/donate.html
> Suggested annual donation: $12.75
>
> Archive: http://www.team.net/pipermail/spridgets
> http://autox.team.net/archive
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> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/spridgets/kevinv1275@gmail.com
>
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<div dir=3D"ltr">Mark,<div><br></div><div><div class=3D"gmail-adn gmail-ads=
" style=3D"border-left:none;padding:0px;display:flex;font-family:"Goog=
le Sans",Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:mediu=
m"><div class=3D"gmail-gs" style=3D"margin:0px;min-width:0px;padding:0px 0p=
x 20px;width:initial"><div class=3D"gmail-"><div id=3D"gmail-:2tc" class=3D=
"gmail-ii gmail-gt" style=3D"direction:ltr;margin:8px 0px 0px;padding:0px;f=
ont-size:0.875rem;overflow-x:hidden"><div id=3D"gmail-:2si" class=3D"gmail-=
a3s gmail-aiL" style=3D"direction:initial;font-variant-numeric:normal;font-=
variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;=
font-feature-settings:normal;font-stretch:normal;font-size:small;line-heigh=
t:1.5;font-family:Arial,Helvetica,sans-serif;overflow:auto hidden"><div dir=
=3D"ltr"><div>Here's something=C2=A0I wrote=C2=A0a few years ago, maybe=
it can help;</div><div><br></div><div><div>I always do checks for spark BE=
FORE I do the checks for Fuel delivery.=C2=A0 You don't want any stray =
fuel vapors anywhere near an area where you will be creating a spark.</div>=
<div><br></div><div>Note; =C2=A0More than once, I have witnessed an A-serie=
s distributor that has dislodged itself from the hole in the engine block d=
ue to a distributor clamp that was not tightened properly.=C2=A0 Checking t=
o make sure the distributor is held securely in the clamp would be well adv=
ised before you check for other electrical problems.</div><div><br></div><d=
iv>Another important note; =C2=A0Before you check electrical connections un=
der the bonnet of your car,=C2=A0<font color=3D"#FF0000">MAKE CERTAIN YOU H=
AVE NO FUEL LEAKS</font>.</div><div><br></div><div>To check for spark.=C2=
=A0 First check for spark at the points.=C2=A0 Remove the distributor cap a=
nd watch the points while you turn the engine over with the starter.=C2=A0 =
Make certain the ignition is switched on if you have a separate switch for =
the ignition on your car.=C2=A0 If you can not see the points while you are=
turning the engine over with the starter (you are by yourself and have no =
one to help you), =C2=A0switch on the ignition and flick the points with a =
small screwdriver (or your finger) to see if you get a spark when the point=
s are separated. =C2=A0 If you have no spark at the points, check for loose=
wires to the coil and/or distributor. =C2=A0 The problem may be in the ele=
ctrical wiring at your ignition switch.=C2=A0 You can hot-wire the coil wit=
h a short piece of wire. =C2=A0(I carry a jump wire with alligator clips on=
each end).=C2=A0 On a negative ground car, connect the =C2=A0jump wire to =
the positive side of the coil and to the positive post on the battery and c=
heck for spark at the points again.=C2=A0 If you still have no spark at the=
points, the problem may either be the condenser or=C2=A0the coil.</div><di=
v><br></div><div>If you have spark at the points, - next check for spark at=
one of the spark plugs.=C2=A0 The easiest way to do this is to remove one =
of the spark plugs and with the ignition wire for that spark plug wire atta=
ched to the plug, hold the spark plug in contact with the engine and turn t=
he engine with the starter.=C2=A0 You should see a spark at the gap in the =
spark plug.=C2=A0 If you have spark at the points but no spark at the plug =
you may have a faulty distributor cap or rotor.=C2=A0 If you have a spark a=
t the spark plug, it's time to check for fuel supply.=C2=A0 Put the dis=
tributor cap back on and re-install the spark plug.=C2=A0 You don't wan=
t any stray sparks while you are checking for fuel supply.</div><div><br></=
div><div>To check for fuel delivery.=C2=A0 Disconnect the fuel line at the =
carburetor and activate the fuel pump. =C2=A0(On cars with electric pumps, =
turning on the ignition will accomplish this.=C2=A0 On cars with mechanical=
fuel pumps you will need to turn the engine with the starter). =C2=A0 If y=
ou have no fuel being delivered at the fuel line you disconnected from the =
carb, you may either be; out of fuel, =C2=A0your fuel pump stopped working,=
or you have a blockage in the tank or at the fuel filter.=C2=A0 Another po=
ssibility is a broken fuel line between the tank and the engine.</div><div =
class=3D"gmail-yj6qo"></div><div class=3D"gmail-adL"><br></div></div><div c=
lass=3D"gmail-adL"><br></div><div class=3D"gmail-adL">Kevin V.</div><div cl=
ass=3D"gmail-adL">Tuscarora, Pa</div></div><div class=3D"gmail-adL"></div><=
/div></div><div class=3D"gmail-WhmR8e" style=3D"clear:both"></div></div></d=
iv><div class=3D"gmail-ajx" style=3D"clear:both"></div></div><div class=3D"=
gmail-gA gmail-gt gmail-acV" style=3D"font-size:0.875rem;padding:0px;width:=
auto;border-bottom-left-radius:0px;border-bottom-right-radius:0px;border-to=
p:none;margin:0px;background-image:initial;background-position:initial;back=
ground-size:initial;background-repeat:initial;background-origin:initial;bac=
kground-clip:initial;font-family:"Google Sans",Roboto,RobotoDraft=
,Helvetica,Arial,sans-serif"><div class=3D"gmail-gB gmail-xu" style=3D"bord=
er-top:0px;padding:0px"><div class=3D"gmail-ip gmail-iq" style=3D"clear:bot=
h;margin:0px;padding:16px 0px;border-top:none"><div id=3D"gmail-:2td"><tabl=
e class=3D"gmail-cf gmail-wS" role=3D"presentation" style=3D"border-collaps=
e:collapse"><tbody><tr><td class=3D"gmail-amq" style=3D"padding:0px 16px;ve=
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div></div></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Sun, Jul 21, 2024 at 8:18=E2=80=AFPM Mark Haynes via Spr=
idgets <<a href=3D"mailto:spridgets@autox.team.net";>spridgets@autox.team=
.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><div dir=3D"ltr"><div>Hey folks,</div><div>I've gotten to the point=
of asking for thoughts on my new 948 engine.</div><div>The specifics of th=
e new engine are as follows:</div><div>948 .020, crowned pistons, 12G202 he=
ad milled 0.185" (touted to be a Dave Tabor head) Rimflow valves (1.25=
I, 1.06 E), Vernier timing gear, SPVP3 cam timed to 102.5 degrees ATDC, Je=
ff Schlemmer 25D distributor, APT lifters, 1.3:1 rockers ,ceramic coated
piston crowns and combustion chambers.</div><div>I finally got it installe=
d with the new Gerard Garage 5 Speed, and I have spark, Ignition timing is =
set per Jeff Schlemmer, compression (when cranking only) 125 psi in all cyl=
inders, carbs are getting fuel.</div><div>I get no Bang, Pop, Fart,nothing =
from the engine when trying to start, even with starting fluid (checking th=
at it wasn't fuel delivery) or rotating the dizzy, I tried swapping plu=
g wires to prove it wasn't ignition 180 out or 1 & 4 wrong or 2 &am=
p; 3 wrong. <br></div><div>I brought in a friend who's a pro mechanic a=
nd he's as stumped as I am. I'm looking for any possibilities, <br>=
</div><div>Just to be sure, this is not even close to my first engine build=
nor my first 948 build. I know how to time cams and build engines, but thi=
s has me stumped and I feel really dumb, so I'm leaning on you all for =
some thoughts and support.</div><div>God, I wish Frank were still here, he&=
#39;d have the answer in a flash.=F0=9F=A5=BA<br></div><div>TIA,<br></div><=
div><div><div dir=3D"ltr" class=3D"gmail_signature"><div dir=3D"ltr"><div>M=
ark Haynes<br></div>It only goes one way- Pay It Forward<br></div></div></d=
iv></div></div>
------------------------<br>
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