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Old 03-31-2021, 11:43 AM   #1
Michael_Velling
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Angry Engine not starting - checked everything - no more idea

Hello, I need advice or help again - sorry :-)

I have the engine now completely ready good compression and it also turns quite well with the starter. The ignition is on the dot. I have set according to Les Andrews and various Youtube videos. All lines durchgemessen according to the manual of Les Andrews...also everything okay.

But the engine does not start! So the carburetor disassembled and cleaned everything - clean. Set the float level with a glass 5/8 inch test fixture under the upper case. Tightness test done - everything tight and fuel in the chamber.

Now when I start but no fuel arrives at the spark plugs? At least they are not wet, even after a large number of revolutions with the starter. The manifold is new, the connection is tight...but nothing happens. It also sucks, held my hand in front of the carb....

Does anyone have any ideas?

Thanks a lot

Michael

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Old 03-31-2021, 12:09 PM   #2
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Default Re: Engine not starting - checked everything - no more idea

With a lot of cranking the engine with it choked there should be excess fuel visible or dripping from carburetor. Have tried to add a small amount of fuel through spark plug holes to see it it will fire off?
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Old 03-31-2021, 12:34 PM   #3
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Default Re: Engine not starting - checked everything - no more idea

Stick your finger in the carb and see if it is wet with fuel. If you do, the. Fuel system is probably your problem. Remember, 90% of all carb problems are ignition problems.
Connect a test light between the passenger side of the coil and ground. Turn key on and crank the engine. The light should blink. Do that before you start taking things apart. Good luck
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Old 03-31-2021, 12:39 PM   #4
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Default Re: Engine not starting - checked everything - no more idea

Was this the same vehicle with the timing problem a few days ago ?
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Old 03-31-2021, 12:39 PM   #5
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Default Re: Engine not starting - checked everything - no more idea

I like to take out a spark plug, leave the wire on, and lay the plug on the block or use an alligator clip to ground the thread of the plug to the block. Have someone crank the engine and watch for the spark. It should be a fairly bright blue flash, not faint and weak.
(Best done out of the sunlight) That eliminates the spark from what's causing it, and you are left with fuel, or possibly timing.

If the fuel bowl has fuel, I'd think the next thing to check is the jets. Also you can try a squirt of starting fluid into the throttlebody while cranking. That will fire off enough cylinders to spin up the motor and develop a lot of vacuum, possibly unclogging and drawing in enough fuel to keep it running.

If fuel sat in the carb for a long time, a rebuild might be needed.
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Old 03-31-2021, 12:52 PM   #6
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Default Re: Engine not starting - checked everything - no more idea

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I would check to make sure the carburetor is getting fuel. Disconnecting the line at the carb lets you check if you have good flow to the carb. If not, the issue is somewhere between the tank and carb in the lines, the tank or the shutoff valve at the tank. If you are getting a good flow of fuel, possibly the fuel valve in the carb is sticking or the fuel line or filter going into the carb are in too far in, blocking the passageways for fuel. The fuel filter in the carb should also be checked to make sure it's completely clean and doesn't obstruct fuel flow.
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Old 03-31-2021, 01:30 PM   #7
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Default Re: Engine not starting - checked everything - no more idea

The carb is complete rebuild today. Fuel is in the carb, adjusted float correct.

The timing is correct... Chrckrd 3 times

The ignition is complete okay... Checked all wires as described.

Spark at the plugs and at the central wire from the coil.

The engine does not suck the fuel. Suck is there. I hold my hand to the carb entrance and feeled it.

The plugs are dry after a lot of turns?

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Old 03-31-2021, 01:34 PM   #8
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Default Re: Engine not starting - checked everything - no more idea

Quote:
Originally Posted by Mister Moose View Post
I like to take out a spark plug, leave the wire on, and lay the plug on the block or use an alligator clip to ground the thread of the plug to the block. Have someone crank the engine and watch for the spark. It should be a fairly bright blue flash, not faint and weak.
(Best done out of the sunlight) That eliminates the spark from what's causing it, and you are left with fuel, or possibly timing.

If the fuel bowl has fuel, I'd think the next thing to check is the jets. Also you can try a squirt of starting fluid into the throttlebody while cranking. That will fire off enough cylinders to spin up the motor and develop a lot of vacuum, possibly unclogging and drawing in enough fuel to keep it running.

If fuel sat in the carb for a long time, a rebuild might be needed.
Added starting fluid in the throttle area, but no result.

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Old 03-31-2021, 01:41 PM   #9
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Default Re: Engine not starting - checked everything - no more idea

Is the rotor turning inside the dist??
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Old 03-31-2021, 01:58 PM   #10
Ernie Vitucci
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Default Re: Engine not starting - checked everything - no more idea

Good Day...You might want to crank the engine with the distributor with the body off and make sure that the points are opening and closing as they should and that you points gap is between 16 and 20 thousands...Ernie in Arizona
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Old 03-31-2021, 02:13 PM   #11
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Default Re: Engine not starting - checked everything - no more idea

Rotor is turning, gap is okay

The problem is, i think, that the fuel is not going in the cylinders. The plugs are complete dry.

Checked all the way with endoskop.. Free

Spark is there.



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Old 03-31-2021, 02:28 PM   #12
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Default Re: Engine not starting - checked everything - no more idea

..spark getting through the primary lead from the coil?
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Old 03-31-2021, 02:37 PM   #13
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Default Re: Engine not starting - checked everything - no more idea

Make sure your distributor rotor is positioned like the picture on Marco's website.
https://web.archive.org/web/20140902...hop/timing.htm
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Old 03-31-2021, 02:50 PM   #14
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Default Re: Engine not starting - checked everything - no more idea

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Originally Posted by Michael_Velling View Post
Added starting fluid in the throttle area, but no result.

Michael Velling
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This is telling. Ether will fire just about anything if there's a spark.

So in my view one of 3 things happened:

1) You have no spark at the plug
2) You have a spark but the timing is way off
3) You cranked for an insufficient period of time to draw the ether into the cylinder

This is why I prefer observing a spark at the plug, it includes all the wires, rotor head, coil, etc etc.

Keep trying - good luck.
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Old 03-31-2021, 02:58 PM   #15
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Default Re: Engine not starting - checked everything - no more idea

Thanks

But why is no fuel in the valve an piston area? These area is complete dry and as new as we rebuild it 3 weeks ago?


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Old 03-31-2021, 03:00 PM   #16
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Default Re: Engine not starting - checked everything - no more idea

He said he had spark at the plugs. We're down to the very unlikely culprits now, like an intermittent condenser or coil. I agree the comment about nothing happening when cranking with starter fluid is important – it takes the carburetor out of the equation. Whatever the problem is, it's electrical.
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Old 03-31-2021, 03:26 PM   #17
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Default Re: Engine not starting - checked everything - no more idea

Okay, but mechanical must the fuel go into the combusion chamber and there is no fuel. The electrical problem may come then when fuel is in the cylinders.

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Old 03-31-2021, 03:31 PM   #18
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Default Re: Engine not starting - checked everything - no more idea

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Okay, but mechanical must the fuel go into the combusion chamber and there is no fuel. The electrical problem may come then when fuel is in the cylinders.

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You said the plugs were dry, that's not the same as no fuel is getting into the cylinders.
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Old 03-31-2021, 03:44 PM   #19
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Default Re: Engine not starting - checked everything - no more idea

Michael in your other post, "Timing Pin Dimple is not TDC?" the group discussed the Model B plate...are you sure the timing is now correct? In any event even with timing off the plugs should be wet, so long as the engine HAS COMPRESSION. If you can test the compression or at least put your thumb over the spark plug hole. If the valves are set incorrectly or simply not seating the engine cannot draw fuel.
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Old 03-31-2021, 04:13 PM   #20
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Default Re: Engine not starting - checked everything - no more idea

I agree with jg61hawk, take out the plugs, crank the engine and see if you have compression. Put your thumb over a spark plug hole and see if it is actually pumping air. Your valves may not be adjusted correctly so you are not flowing enough air or not making compression. In your first post, you stated that you had good compression so this is a long shot. Does it make compression on every stroke when you check or is it only making compression on the first stroke? Your cam may be out of time?
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