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post #1 of (permalink) Old 12-03-2000, 01:30 PM
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Need Help with an 85 Ford Bronco Choke?

I have an 85 Bronco, full size, 4x4, 5.8L 4V
engine w/auto tranny. 4bbl. Carb. This truck has about
266K miles on it and I am having trouble with it now.
It get horrid gas milage, about 9 MPG highway. It
wont idle worth crap and has a hard time starting if
it has just been shut off. It starts fairly easy in
the mornings, or after sitting for a while. What
could be the problem? It has an electric-assisted
choke. Recently the truck wouldnt start at all, so I
took off the top of the air filter houseing and
noticed the butterfly was completely closed tight. We
held it fully open the the truck started, but then
driving down the road it ran crappy. It would surge and
sputter. I shut it off once I was home, and came out in
the morning and it started right up, before starting
it, I noticed the butterfly was in the open position.
It only runs like crap when it is closed. I know
nothing about this truck so I need some help about what
to do. Do you have to press down the gas, hold it
down, and let off slowly to set the choke in the
mornings? I never do this. I start cranking it, and when I
see it isnt going to start (every time) I press and
hold the gas down until it starts taking off, then
slowly ease it back, and the car runs ok. I have the
aircleaner housing off now, and am doing a tune up. I dont,
by the way, use the smog pump, it is not hooked up
with a belt. I also cant find the fuel filter? Where
is it? What should I do to get the car running good
again, and hopefully get this horrid gas milage taken
care of? Thanks so much! Sorry for the length.

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post #2 of (permalink) Old 12-05-2000, 10:51 AM
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Re: Need Help with an 85 Ford Bronco Choke?

sounds like it is about time for a carb rebuild. That along with a complete tune up should help out the mpg and driveability. I think the fuel filter should screw into the carb, right where the fuel line attaches to it.

post #3 of (permalink) Old 12-08-2000, 09:58 PM
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Re: Need Help with an 85 Ford Bronco Choke?

The choke is certainly out of adjustment, but it's easy to do: just rotate the round housing on the side of the carb - you will either have to loosen 3 screws or drill out 3 rivets and replace them with screws. Turn it so that the butterflies just open with the engine COLD. HOWEVER, to be that far out, there is something wrong that requires a carb rebuild to get everything running right.

83 Custom w/95 4.9L EFI, 78 NP435, 83 NP208, 83 D44IFS 3.07, 87 Ford 8.8ABS 3.08, Michelin LTX AT 31x10.50R15
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