Rebuilt my autolite carb, and other stuff... Now won't start???? - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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Old 04-21-2013, 08:34 AM   #1 (permalink)
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Rebuilt my autolite carb, and other stuff... Now won't start????

Complete rebuild on my autolite 4 barrel.. I have 1963.5 galaxie 500 z-code... It was having trouble starting so I cleaned and rebuilt the carb, put in new plugs and wires, changed the coil, new distributor cap, replaced the vaccume advance unit on front of distributor with a new one that said it was for a 427(maybe that is my problem), fixed a few small wire issues, and found a loose distributor... Which I tightened down??? Not sure where to start and trouble shoot?? It tries to start but it is like its not getting fuel... Do I need to prime the carb some how??? Should I fill the float bowls with fuel or something??? Any help welcomed, was going to get timing right once I got it running... Thanks for any and all input.
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Old 04-21-2013, 10:01 AM   #2 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

Just pour a little gas in the carb. (about 1/4 cup) if it fires up it will prime fuel pump and fill bowl. (doesn't take long) If it does not start with a prime then probably something in ignition. Did you move the distributor?? Did you wire the plugs correctly in order?? I would start with the simple things first!! Good Luck.
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Old 04-21-2013, 12:02 PM   #3 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

Agree w tim but I would pour the gas into the float bowls. That way you can check on the float height.

Remove the 8 screws holding the carburetor top on, remove the air cleaner stud, and slide the top to one side. Fill the bowl 1" from the top and see if it will fire up. Car should idle okay with the top open like that. After a minute check the fuel level. Running, it should be 1" (29/32") from the top. If it is not, turn off the engine and 1.) bend the float to make it so or 2.) let it sit for a couple of hours and see if the level goes down, which would indicate a leak in the power valve.
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Putts drives a 1965 four door Galaxie. Rebuilt 390. 4100 on a Performer, AC, PS, PB w scarebird front discs on Cragar S/S, MX transm w/3.0 rear. The sound, seats, dash and hood are customized.
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Old 04-21-2013, 12:44 PM   #4 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

Did you change the condenser also? Check to see if you're getting a good strong spark.
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Old 04-21-2013, 02:27 PM   #5 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

I did replace the condenser as well... It has good spark. I also checked the plugs and made sure they where in the correct order. Thanks for double checkIng though as I am always forgetting something. I was wondering about pouring fuel into the bowls... I adjusted the floats per the 62 FSM... And I had to replace 1 because it had fuel in it. I will try the fuel trick when I get home on Wednesday... If anyone else has some ideas to try please chime in... Until then thanks a lot.
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Old 04-22-2013, 06:17 PM   #6 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

First thing, looking down into the carb (air cleaner off), move the accelerator linkage to see if fuel is being blasted into the carb throat. If so you are getting fuel and have it in the bowl, if not, something is causing fuel not to reach the carb. The car should start and run even if the fuel in the bowl is set incorrectly. If the carb is either fully starved or flooded it will not allow the engine to run. If your floats are so far off that they will not allow the needle valves to seat, then the car will flood and not run. I don't see that as possible, but still....... Once I saw a guy not put the float retainers on the needle valves, and the car started then quit. The fuel level pushed the floats off and into the main part of the bowls and gas was just pouring into the manifold, car was completely flooded out.

Pull off a plug wire, hold it 1/4 inch from a grounded source and have somebody crank the engine to see if you get a good hot blue spark. Make SURE nothing flammable or no gas vapors are present when you do this. If a hot blue spark, then your coil, condenser is ok. Are your points gapped correctly? If they were not tightened, they can slip and won't open, and then no spark, or not enough to jump the gap under compression. A weak coil, condenser, or bad gap will allow a spark to make the jump OUTSIDE of the engine, but under compression you won't get a spark.

Don't worry about the vacuum advance, that's only used for mid-range throttle timing, it is not even active at starting or low rpms.

What are a few small wire issues? Are you talking about the leads into the distributor from the coil and the plate to the dist. ground? How many times I have seen Fords with spliced leads into the coil that eventually get grounded out.

The most common problem people have is the points are not adjusted correctly, the ground wire was not put back onto the plate, the leads on the coil reversed, and numero-uno, all the plug wires removed at once and the new ones put back in the incorrect order.

There is also one other possibility, it's rare, but it does occur, and it happened to me on my '55 Fairlane about 20 years ago, put on new plug wires, and car would not start. I checked them over and over and about pulled out my hair. Turns out it was defective new wires. They were broken inside. Put on another set, this time genuine Ford, and bang-started right up!

If all else fails, do a manual time on the distributor to number one cylinder TDC.
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Old 04-26-2013, 07:35 AM   #7 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

UPDATE: put some fuel in the bowls and it cranks easier than ever... He'll yeah!!!! It is idling very high like I have it half way to the floor... Where would this be an issue??? At the throttle linkage??? The two front idle screws on carb??? Or possibly the distributor??? Thanks in advance.
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Old 04-26-2013, 09:21 AM   #8 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

The hot idle screw on the driver's side (when warm) is the usual way to control idle. I assume backing off on that did not work?

Sometimes that screw gets overruled. Couple of ideas: a.) If the fast idle screw on the passenger side is screwed in to the cam too tight it won't turn the throttle plates loose. So you get stuck with a fast idle. b.) the choke linkages are stuck or misadjusted or are not getting warm. This leaves the choke plate in the (rich) closed position even when the car is warmed up. c.) somebody tried to boost the idle by keeping the secondary throttle plates open, you will need to close them back to spec. d.) The two idle screws need adjustment. e.) you have a leak in the bottom of the carb, letting gas flow into the intake. f.) throttle cable needs adjustment.
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Putts drives a 1965 four door Galaxie. Rebuilt 390. 4100 on a Performer, AC, PS, PB w scarebird front discs on Cragar S/S, MX transm w/3.0 rear. The sound, seats, dash and hood are customized.

Last edited by puttster; 04-26-2013 at 09:46 AM.
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Old 04-26-2013, 09:34 AM   #9 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

You have a vacuum leak... Your carb is not adjusted properly and when you said
Quote:
I'll get the timing right after I get it started
I nearly schitt myself laughing, because if your timing is NOT right, HOW are you going to manage to start your engine?

The Timing is 75% of what makes your engine run and 25% of the process...

25% Timing
25% Compression
25% Spark
25% Fuel

75% Timing adjustment....

Find the vacuum leak (like the brake booster tube not being connected) get a base set for the AF mixture screws and the hot idle set screw. The do it again, but without pouring fuel into carb, it takes a surprisingly small amount of fuel to start a car.
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Old 04-27-2013, 12:05 PM   #10 (permalink)
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Re: Rebuilt my autolite carb, and other stuff... Now won't start????

It's been pouring all day here so I haven't got to mess with my ride... I was told by previous topic I had going that my carb is actually a 1965 autolite 4100 if that helps with some feedback.
I do appreciate all the help and will be trying to figure out vacuum leak or what else it could be when the rain lets up... Until then
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