Carb Woes

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Mar 24, 2001 | 07:17 PM

f10074

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Carb Woes

Well I'm having some issues with my carb on my 74 F350. Any time I acclerate hard up ro 50 mph she stalls and sputers and then dies out, if I drive slowly up to 45 no problems, if i drive slowly up to 50 she do the sputer and die thing. I have worked with my mechinac on this one and it is kicking our butts. 1st we checked fuel pressure alittel below 5psi, we changed the pump didn't fix it, we hooked it up to his machine and tuned the carb, the carb is dead on tune, still didn't fix it, checked timing we it was 10 degrees off, after 2 days of working the dizzy finally got it lose and set the timing, still didn't fix it, maybe the floats are off checked those are right where they are supposed to be. What gives? I'm out of ideas. Help please. TIA

William (Tony) Whited
74 F350 Ranger XLT Super Camper Special 460
77 F150 Custom 460
El Paso TX
Semper Fi

Mar 24, 2001 | 08:07 PM

Nathan

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Carb Woes

Did you overlook the fuel filter and any rubber fuel line that may be collapsing? How about something floating around in the gas tank plugging the pickup. Ive found old rags in two tanks so far.

Nathan

Mar 24, 2001 | 08:34 PM

f10074

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Carb Woes

Fuel filter has been changed, I have looked over most of the rubber hoses and replaced those that looked bad.

William (Tony) Whited
74 F350 Ranger XLT Super Camper Special 460
77 F150 Custom 460
El Paso TX
Semper Fi

Mar 24, 2001 | 09:58 PM

jspegg

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Carb Woes

what kind of ignition go you have.I had a similar problem with mine and it was a bad distributor if you have points replace them with a new set then put a dwell meter on it and make sure your dwell doesn't move also check your vacuum advance it could have ruptured so the faster you go the bigger vacuum leak you create.It not positively a carb. problem so be sure to check the distributor out.

Mar 24, 2001 | 10:16 PM

f10074

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Carb Woes

No points and the dizzy checks out as well as the vac advance

William (Tony) Whited
74 F350 Ranger XLT Super Camper Special 460
77 F150 Custom 460
El Paso TX
Semper Fi

Mar 24, 2001 | 11:07 PM

proeliator

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Joined: Sep 2000

Posts: 8,238

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From: Oregon

Carb Woes

These problems can be a pain to track down, and often times its not even the carb. You mentioned you had a mechanic? Maybe he has a spare carb laying around for a test. I always have a couple of odd carbs laying around and in the past when I really got in a bind I just slapped on another carb to see if that fixed the problem or not (on these old rigs its about a 15 minute job). This could answer the question of whether or not its actually your carb and help narrow down your search. Just an idea, hope you figure it out. I know these problems can be maddening.

If your knuckles ain't bleeding you did something wrong.

'72 F-250 "Hi-Boy" 4x4, Dana 60/HD44, FE390 @ 400hp(purt near!), 4-speed, custom suspension w 4" lift, mud on black.

Mar 25, 2001 | 09:31 AM

jkmjustin

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Carb Woes

Sounds like you have electronic ignition. If so check and or change out the pickup unit in the distributor. I once had a starting problem because of this and have heard of sputering problems simular to yours because of this.
The magnets become loss in the epoxy sometimes. Good luck these aare sometimes things to drive you up the wall.