Bronco Falling On Its Face

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Jan 20, 2006 | 01:45 PM

sickboyclothing

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Bronco Falling On Its Face

I just bought a 1982 fullsize from a guy that was having a problem that everytime he would drive he would step on it and the bronco would just bog out.
He had the heads overhauled new timing chain fuel lines blown out replaced the carb. and intake manifold with a new edelbrock beefed up the ignition and still falling on its face i just popped the hood yesterday for the first time. my first attack is going to be the catalytic converter is this a good first ussumption or is there a better place to start please any feed back will help!!!!

Jan 20, 2006 | 01:53 PM

wlihntr

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From: colorado

could very well be a blocked cat, or a clogged fuel filter

Jan 20, 2006 | 01:57 PM

1970Custom

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From: Middleton, ID

I'd have to agree with wlihntr, check there first as I've had this problem on a couple other vehicles of mine.

Jan 20, 2006 | 01:59 PM

sickboyclothing

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the fuel filter has been replaced

Jan 20, 2006 | 02:06 PM

seventyseven250

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Joined: Jun 2005

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From: Calgary Canada

So you bought this rig from a guy who was having problems with it. You are gonna fit in just fine around here.

Oh yeah, I was going to say the fuel filter as well, but I was beat to it.

Jan 20, 2006 | 03:31 PM

jdmorg

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From: just outside of Phila.

Give this a shot...

https://www.ford-trucks.com/forums/f...splay.php?f=44

It's the Big Bronco forums on this website. If there are more knowledgable Bronco owners out there, they're not on this website. The guys in there know it all up and down. Ask in there, and you'll definitely get some more responses.

Jan 20, 2006 | 04:06 PM

Bdox

Fleet Owner

Joined: Sep 2005

Posts: 28,609

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From: Lake Tahoe, Nevada

Assume nothing and don't believe half of what you were told about the history.

Does the engine miss at any point? Can it pull a steep grade? Does it backfire through the intake or exhaust?

The cat could be a problem... check it out. Vacuum gauge.
Bogging is usually a fuel starvation issue unless it's also missing. If it misses then it's more likely an ignition problem.

Start with the tank, the fuel pickup, the lines, the filter(s), fuel pump pressure.

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Jan 20, 2006 | 06:16 PM

big hoss 29

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Joined: May 2004

Posts: 2,223

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From: Billings Montana

If the carb is too big for the motor, like a 750CFM unit, you might need to go to a smaller unit. If it's a 600CFM unit, it might just need to be fine tuned.I know from personal experience how hard it is to tune an Edelbrock, I own 3 of them and each one is more problematic than the previous one.