Bowl seems to be running out of gas

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ledslinger29
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Bowl seems to be running out of gas

Post #1 by ledslinger29 » Wed Dec 05, 2018 5:16 pm

Hey fellas, long time no post. The Autolite 1100 on my 170 seems to be running out of fuel, and I’m wondering if ya’ll think it could be boiling off. When I rebuilt the engine last year, I removed the spacer that has the connector for the heater hose, and added a phenolic spacer instead, thinking it wasn’t needed. When I park the truck after driving a few miles, say to run into the store and grab a six pack and get some gas, the truck doesn’t want to start back up. This only happens if it sat long enough for the engine temp to go up after shutting down for a bit. Any of y’all ever experience this?
68 Bronco Halfcab 170 wallered out .060 over, oversized valves, zero decked, 9:1 SCR, Autolite 1100 w/ Loadomatic/Pertronix, Schneider 248/56H cam

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chad
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Re: Bowl seems to be running out of gas

Post #2 by chad » Wed Dec 05, 2018 5:27 pm

can U see any wet there at the carb?
leak @ needle/seat?
Its short enuff time that vehicle is still 'warm'? So 'finger' on carb
linkage is still up (choke engagement) so choke is not involved but still needed?

Float sinks in bowel?

* What happens when U turn the key? What do U do w/ur throttle/foot?

It's possible frm 'heat sink' but I doubt it.
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

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Econoline
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Re: Bowl seems to be running out of gas

Post #3 by Econoline » Wed Dec 05, 2018 9:22 pm

Sounds like it is or vapor lock. If it is boiling off you should be able to smell it.
It ain't gonna fix itself

1964 Econoline 170 3.03 on the tree swapped to a 250 with an aod, custom front boosted disc brakes and 3.70 9" rear axle
1993 F-150 xl 4x4 4.9 5-speed, Mazda manual stock
1992 Jeep Cherokee 2-door 4.0, 5-speed manual
1989 Toyota Cressida 3.0, auto

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ledslinger29
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Re: Bowl seems to be running out of gas

Post #4 by ledslinger29 » Thu Dec 06, 2018 10:16 am

Now that I think about there's a good chance that vapor lock is my issue. I haven't looked at the in tank filter in years, and I put a new fuel pump on when I rebuilt the motor. I suppose I could start there.
68 Bronco Halfcab 170 wallered out .060 over, oversized valves, zero decked, 9:1 SCR, Autolite 1100 w/ Loadomatic/Pertronix, Schneider 248/56H cam

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chad
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short drive, trouble starting after short sit

Post #5 by chad » Thu Dec 06, 2018 10:32 am

I think 'carb iceing' - 'vapor lock' would happen as driven.
I guess if there wuz enuff moisture in the air (not in today's gas?)
it could happen while siting (10 min drive, shut off, few min in 'store', not enuff time for heat sink
to warm 'froz carb'...

Again - what do U do @ 'restart'?
"Big thing is only make one change at a time. Change 2 or more things at a time it becomes difficult to figure which change helped or hurt" turbo2256b » 1/16/2017
Chad - '70 LUEB on '77 frame (i.e. PS, D44, trapezoidal BB 9", 4.11), 250, NV 3550 & DSII to B transplanted, "T" D20/PTO, 2" SL, 1" BL, 4 discs, 33"X15", etc. Seeking: Hydraulic gear motor for Koenig pto. chrlsful@aol.com (413) 259-1749

CZLN6
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Re: Bowl seems to be running out of gas

Post #6 by CZLN6 » Thu Dec 06, 2018 12:26 pm

Howdy Ledslinger and All:

FYI- Gas evaporates very quickly. Even faster on a hot engine. You are not very likely to see a carb gas leak. The best you can do is to look for the tell-tale stain left behind. Even the smell dissipates very quickly. Try to catch a smell or spot a leak at engine shut off.

Your best bet is to check all possible causes of fuel and fuel flow issues.

Adios, David
co-author of the Falcon Performance Handbook
http://www.falcon6handbook.com/

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