Nervous incident with lucinda - Vintage Mustang Forums
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post #1 of 35 (permalink) Old 04-16-2019, 06:55 PM Thread Starter
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Nervous incident with lucinda

So yesterday i rebuilt my carb. It is a motorcraft 2100 so very easy to rebuild. However today i tried starting up the car. I tried starting the car before i rebuilt the carb but she wouldnt turn over. Today she turned over and the first time it sounded like the engine whined and then died out. I assumed because it just needed to get gas back in the carburetor. So we tried again and i saw the fuel filter fill up and then it turned over again and died immediately. I tried starting it for the third time and it turned over but right when that happened the carburetor blew a huge fireball to the ceiling of the garage. I dont really want to start it again or even know if it is safe to try again. Halp lol
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post #2 of 35 (permalink) Old 04-16-2019, 07:23 PM
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Ignition timing is messed up and /or float set incorrectly dumping fuel in. If you pulled off your ignition wires, did you put them back on the cap in the correct firing order and in the correct direction? What made you rebuild the carb to begin with?

'66 Tahoe Turquoise/ Aqua coupe
•289 / 4100 •C4 Auto •Disc Brakes
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post #3 of 35 (permalink) Old 04-16-2019, 07:31 PM Thread Starter
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Ignition timing is messed up and /or float set incorrectly dumping fuel in. If you pulled off your ignition wires, did you put them back on the cap in the correct firing order and in the correct direction? What made you rebuild the carb to begin with?
I didnt pull any ignition wires. And the float from what i measured was the same before i took it out. I rebuilt the carburetor because i dont think it has ever been taken off nor taken care of and it has always given me problems since the get go.
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post #4 of 35 (permalink) Old 04-16-2019, 07:41 PM
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Is there any chance you moved the distributor which would change the ignition timing?

If it's a 289, 302 or 351W, you can start over by pointing the distributor vacuum advance straight ahead, towards the front of the car. This will allow your engine to start and run smoothly (assuming the distributor and plug wires are installed correctly) Connect a timing light and, with the vacuum advance disconnected, set the ignition timing.

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post #5 of 35 (permalink) Old 04-16-2019, 07:44 PM
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Those are really good, simple carbs. I would turn the idle screws in just til they stop, not hard, then back out 1 and 1/2 or 2 turns each. Then check engine off (static) timing for the number one cylinder at top dead center of the compression stroke, make sure the ignition rotor is pointing at the number one position on the cap when it would be in place then check the engine running (dynamic) timing and see if you can get it to about 6 degrees before top dead center with a timing light. If it is way off, perhaps your balancer ring has slipped and setting it by the timing marks will have the timing too far advanced or retarded. Be sure on cold cranking the throttle plates are open just a hair, the choke is closed correctly and the engine isn't flooded from pressing the accelerator a bunch of times. It usually takes a few cranks for the fuel bowl to fill and every thing to do its job on initial start after rebuild.
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post #6 of 35 (permalink) Old 04-16-2019, 07:47 PM
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Also, are you running points and condenser in good shape and gapped correctly with a clean ground, or are you running an aftermarket electronic ignition, etc.?
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post #7 of 35 (permalink) Old 04-16-2019, 08:37 PM Thread Starter
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So for some small back story this car has been sitting for about three years just recently got it shipped to me. I used it as a daily driver but them it sat in a back alley in grass and now i have no idea what needs to be done. When i rebuilt the carburetor last night i put everything back the way it was but no dice. I didnt unplug anything from the distributor nor did i even turn it in the slightest. Also i apologize but im not too educated on the car. I know some but not alot of it. So dumbing things down a little might be best. My main concern is the fireball as well. Is it even safe to give it another go? I mean ill try it as many times as needed with as many fireballs i would just rather not have my carb explode completely.
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post #8 of 35 (permalink) Old 04-16-2019, 09:20 PM
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1st, put your city/state in your signature. Maybe someone close can stop by to help. So it was running ok when you parked it 3 years ago. Also curious if its points or electronic ignition. Have to ask if you popped the cap to take a look see and if its points can you clean the contacts and check the gap. If you pull the coil wire and crank it over does it seem to be dumping raw gas into the intake? I have 3 extinguishers in my garage and one in the car!
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post #9 of 35 (permalink) Old 04-16-2019, 10:02 PM
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I sincerely hope I am wrong but I had a junk yard 302 in my car for a while and it blew a fireball like that when the nylon timing chain gear stripped. If you do a compression check and cylinder(s) have no compression, were talking boat anchor...


There were some dark years where Ford used nylon gears for the lower small timing chain gear, if it is a high mileage car...



BTW, NEVER store a car in grass, it dissolves the underside of the car as the grass won't allow air to pass under so when it gets damp it stays damp. Worst thing you can do to a car.


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post #10 of 35 (permalink) Old 04-16-2019, 10:11 PM
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Quote:
Originally Posted by 1967coupeFD View Post
I tried starting it for the third time and it turned over but right when that happened the carburetor blew a huge fireball to the ceiling of the garage. I dont really want to start it again or even know if it is safe to try again. Halp lol
I hate it when that happens. As long as you don't have your face near the carb it's not dangerous. Startling, though.
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post #11 of 35 (permalink) Old 04-16-2019, 11:43 PM
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I hate it when that happens. As long as you don't have your face near the carb it's not dangerous. Startling, though.
No kidding. That's a good way to come away with no eyebrows haha, IF you still have your face.
Attached Images
File Type: jpeg images.jpeg (7.7 KB, 94 views)
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'66 Tahoe Turquoise/ Aqua coupe
•289 / 4100 •C4 Auto •Disc Brakes
•Dual Exhaust •16:1 Manual Steering
•Rally Pac •Console •Deluxe Belts
•LOTS of Rotunda accessories
•Original Styled Steel Wheels
...my first car

'66 Emberglo / Parchment coupe
•289 / 2100 •C4 Auto •Disc Brakes
•Dual Exhaust •16:1 Power Steering
•Dealer Air Conditioning •Console
...son's first car


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post #12 of 35 (permalink) Old 04-16-2019, 11:46 PM
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I hate it when that happens. As long as you don't have your face near the carb it's not dangerous. Startling, though.
:-) Sure gets your attention.

How long has it been since the car ran? Did you start it before you took the carb off for the rebuild? How old is the gas in the gas tank?

Could be a million things... we need more info to help.

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post #13 of 35 (permalink) Old 04-16-2019, 11:52 PM
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No kidding. That's a good way to come away with no eyebrows haha, IF you still have your face.
Gotta quit buying those ACME carb rebuild kits!
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post #14 of 35 (permalink) Old 04-17-2019, 07:17 AM Thread Starter
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Originally Posted by geicoman58 View Post
1st, put your city/state in your signature. Maybe someone close can stop by to help. So it was running ok when you parked it 3 years ago. Also curious if its points or electronic ignition. Have to ask if you popped the cap to take a look see and if its points can you clean the contacts and check the gap. If you pull the coil wire and crank it over does it seem to be dumping raw gas into the intake? I have 3 extinguishers in my garage and one in the car!
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Quote:
Originally Posted by 22GT View Post
I hate it when that happens. As long as you don't have your face near the carb it's not dangerous. Startling, though.
🙂 Sure gets your attention.

How long has it been since the car ran? Did you start it before you took the carb off for the rebuild? How old is the gas in the gas tank?

Could be a million things... we need more info to help.
The lst time the car ran was three years ago. When it was shipped here i tried starting it and it would crank and crank but wouldnt turn over. Ive always meant to rebuild the carburetor but didnt get around to it til two days ago. But 3 years ago yes it was running fine but i believe it was running very rich and i couldnt quite tune the carb correctly. Also never did anything with the plugs nor the discriminator. Ive researched all last night for other people with the same problem and ive been seeing almost all have to do with the timing and the discriminator. Possibly someone back home couldve messed with mine but how do i fix the timing when i cant start the car?
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post #15 of 35 (permalink) Old 04-17-2019, 07:18 AM Thread Starter
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Pictures of almost every angle of my carburetor and how its always been maybe something isnt right but thats what ill leave these pics here for. Hopefully theyll help
Attached Images
File Type: jpg 1855DEE4-78BF-45A9-8D42-99A4ABE1E943_1555499885599.jpg (504.5 KB, 10 views)
File Type: jpg 94A23C73-51AB-4E68-A0B1-D5555D08BD79_1555499901775.jpg (514.5 KB, 10 views)
File Type: jpg 1DF38CD1-73ED-4124-B756-19F34D663D2E_1555499918985.jpg (484.0 KB, 10 views)
File Type: jpg 744CF675-837C-44B9-8C54-CAB281BE88C8_1555499945739.jpg (474.3 KB, 7 views)
File Type: jpg C441C666-86D0-47A7-BF9A-22302ABF271A_1555499959068.jpg (354.3 KB, 6 views)
File Type: jpg 6C8139B6-75F1-4437-84F4-BC8D8BC47E59_1555499982029.jpg (523.3 KB, 5 views)
File Type: jpg 07B5BC57-E62F-4415-AA90-64796E477B40_1555499994222.jpg (453.0 KB, 5 views)
File Type: jpg 56DF8FB0-1B6D-4A7C-BF69-C2071A5BE08E_1555500010064.jpg (348.7 KB, 5 views)
File Type: jpg A82DA98C-3086-4E55-91F4-6DE7958C1AB7_1555500024078.jpg (432.4 KB, 6 views)
File Type: jpg 2D1825C2-348D-4879-A6C9-CB2F80B4A3A6_1555500045539.jpg (465.4 KB, 5 views)

Last edited by 1967coupeFD; 04-17-2019 at 07:20 AM.
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