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Old 07-29-2008, 08:37 PM
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350 cranks but wont start. Fuel? Spark? VIDEO INSIDE

So I finished wiring up everything this afternoon on the 350. I went to start it and it just cranks. Figured it needed fuel so I poured a bit down the carb and still wouldn't start. I noticed that there is no fuel coming thru my fuel pump though because the filter is bone dry.....

Could it be a timing issue? or maybe spark ?... I know its something simple.

Here's a video I shot while the wife tried to crank it. Notice the puffing from the carb



http://www.youtube.com/watch?v=URwZyk0AyOY

I called a buddy of mine and he suggested i go with an HEI distributor instead. He thinks its a timing issue because of the carb puffing...

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Old 07-29-2008, 09:21 PM
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What was done to the motor since it last ran?


Spitting back through the carb....timing off, or firing order not right, or if you messed with the valves it could be tight intakes.


I'd go with timing & firing order.
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Old 07-29-2008, 09:45 PM
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Post a few pictures of the plug wires, at the distributor, and where they go. It is hard to tell from that short video. I watched it 5 times, and I could not see, if it was correct.

Just trying to help.

Stephen
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Old 07-29-2008, 10:14 PM
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Hi,
What is what looks like a spark
on your first attempt in the front of the dist.
second attempt behind the distributor
& it sounds like something knocking.
Rich
PS I also think your timing is late, the knocking I
hear maybe spark ark,
whatever the case you need to address the arcing

Last edited by richard stewart 3rd; 07-29-2008 at 10:22 PM.
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Old 07-29-2008, 11:45 PM
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Triple check plug wires, then make sure all the rockers are adjusted.

gotta be one of the two.
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Old 07-30-2008, 12:53 AM
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This may sound dumb, but did you check to ensure that the rotor is installed?
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Old 07-30-2008, 04:26 AM
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Quote:
Originally Posted by A56Nomad
This may sound dumb, but did you check to ensure that the rotor is installed?
Just watched the video (smart thing eh) its not getting any spark obviously, see if you can ground the plugs and looks for spark, it may take an extra pair of hands.
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Old 07-30-2008, 06:33 AM
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F&J - Nothing was done to the motor since the last time I saw it run back in Nov 06'. It was on a run stand and it fired right up. I haven't messed with the valves. I did however crack the the distributor cap when i was loading it to take it home. I bought a new cap recently.

Carsavvy Cook - Here's a pic of how my plug wires are running.


Richard Stewart 3rd- It sounds like a timing issue....

Nsomnia- Quadruple checked the wires.. I haven't messed with the valve train.

A56 Nomad - Not a dumb suggestion at all. In fact I think you made the bulb over my head light up !!...I think we're on to something. I mentioned that I had cracked the original cap when I bought the motor. I only replaced the cap but didn't even bother checking to make sure the rotor was hooked up correctly. All i did was slap on a new cap 3 days ago....


THANKS FELLAS FOR THE SUGGESTIONS.... Soon as I get home I'm actually gonna swap out the points for an HEI unit. Hopefully this may norrow down the problem even further.


Its gotta be spark or timing....
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Old 07-30-2008, 07:36 PM
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re: 350 cranks but wont start. Fuel? Spark?

You mentioned in your first entry about no fuel in the filter or ?? Hopefully you have verified that the carb is full of fuel. You should be able to look down the primaries and see/smell fuel as you pump the gas. You could have a spark problem too. Lately I have been having problems with cars come in pairs. So you may have both a fuel and spark issue.
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Old 07-31-2008, 09:35 AM
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Back with an update fellas. I swapped out the points distributor for an HEI unit and set it at TDC just in case i might have done it wrong last time. I went to fire it up and this time no puffing from the carb. Now I'm getting pops from the headers.... The pops are about 2 - 3 second apart. Almost sounds like its backfiring.....

Here's another thing I noticed. The fuel filter is actually full of fuel as where before it was bone dry. So that's a good thing right? I know the fuel pump is working.

My question now is. Could it be that the carb is not feeding fuel down the intake? It seems to me that maybe I'm missing some linkage or something is stuck on my carb because when I step on the gas, the shift linkage pulls as it should but the butterflies dont do squat...

here are some pics I took of the carb and another video.....


By the way, what am i supposed to hook up to this?(circled in red). What is it?





Is the throttle arm supposed to touch this bolt head?



THE VIDEO OF THE CARB:
http://www.youtube.com/user/SinSiete
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Old 07-31-2008, 10:02 AM
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Popping out the exhaust is not a good sign. Could be ignition, wiring, valve adjustment or cam timing.


A few comments on the carb.

1. There is a small pipe on the pass side by the choke pulloff, cap it off. As is, it gives you a vacuum leak.

2. On the rear of the carb, there should be a LARGE threaded hole for the brake booster. If you have manual brakes, make sure you plug the hole. As is, it gives a HUGE vacuum leak.

3. The thing circled in red is an "idle solenoid". They are usually used with A/C equipped engines. They can also be wired to the ignition to kick up the idle too. When wired and receiving 12 volts, it should extend the plunger (bolt head looking part) and kick up the idle some. You can adjust how much by turning the plunger with a 1/2" wrench. Very use full item.

4. Open the choke manually like you have in the picture, then slowly pull the linkage back to wide open. (engine OFF) You should see two small streams of fuel spray from the accelerator nozzle. No spray, accelerator pump is bad OR the carb has NO fuel in it.

5. On the FRONT of the carb, at the very bottom center, there will be a 3/8" pipe for your PCV. Hopefully, you will have a PCV valve hooked to it. If not, CAP it off too. Another huge vacuum leak.

Last edited by Jmark; 07-31-2008 at 10:09 AM.
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Old 07-31-2008, 10:08 AM
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Quote:
Originally Posted by Jmark
Popping out the exhaust is not a good sign. Could be ignition, wiring, valve adjustment or cam timing.


A few comments on the carb.

1. There is a small pipe on the pass side by the choke pulloff, cap it off. As is, it gives you a vacuum leak.
2. On the rear of the carb, there should be a LARGE threaded hole for the brake booster. If you have manual brakes, make sure you plug the hole. As is, it gives a HUGE vacuum leak.
3. The thing circled in red is an "idle solenoid". They are usually used with A/C equipped engines. They can also be wired to the ignition to kick up the idle too. Very use full item.
4. Open the choke manually like you have in the picture, then slowly pull the linkage back to wide open. (engine OFF) You should see two small streams of fuel spray from the accelerator nozzle. No spray, accelerator pump is bad OR the carb has NO fuel in it.
1)Shouldn't that pipe be hooked up to the distributor for vacuum?
2)yes it's plugged.
3)Since I have NO a/c should I just ignore it being there?
4)Alright give me a second let me go try this..... be right back
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Old 07-31-2008, 10:11 AM
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Quote:
Originally Posted by Sin7
1)Shouldn't that pipe be hooked up to the distributor for vacuum?
2)yes it's plugged.
3)Since I have NO a/c should I just ignore it being there?
4)Alright give me a second let me go try this..... be right back

1. That pipe "usually" goes to the air cleaner fresh air vacuum door. It "can" be used for the advance if you decide to use manifold vacuum. For now, just make sure it's capped.

2. Good.

3. You can ignore it for now, or send it to me! LOL

In your close up picture of the idle solenoid, I can see the PCV pipe sticking out with no cap on it. You need something to stop that vacuum leak. If you don't have a cap, get about an inch of 3/8" fuel line and stick a bolt in one end and then shove it on. Napa sells assorted vacuum caps.
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Old 07-31-2008, 10:19 AM
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Okay I'm back... I opened up the choke and tugged on the throttle. I saw no saw gas stream into the carb...

Is there where it should be streaming from?
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Old 07-31-2008, 10:21 AM
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Hi,
When you work the throttle, do you see any fuel being squirting
in? you should as the accelerator pump is moving, but it could be defective, do you have another carb?

idle solenoid, A single wire with a black plastic plug, not a big deal.

Open vacuum ports, you need to close them off, were they open
in the first video?

when you changed from points to hei, what wire did you use to
run power to the hei coil? did you run a new one?

Rich
Yes that's where gas should be squirting from as you work the throttle

Last edited by richard stewart 3rd; 07-31-2008 at 10:27 AM.
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