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1979 Ford F350

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Matt Chambers

04-27-2003 18:11:06




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I bought a '79 F350 Rescue Rig from the Fire department six months ago, and after a lot of work, it runs great. I plan to use the truck for my landscaping business and around the farm. However, the truck doesn't feel like its putting out full power. Now I do know that the heat shields for the exhaust manifolds are missing, and could be causing the fuel to boil in the carb. I checked with local dealers and cannot find stock shields. What would be the easiest way to fix this problem?

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Bob G

05-01-2003 10:29:38




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
You might want to check the timing chain. I have a 69 F350 with a 360 and it will scream down the road with the 4:11 rear end. I have hauled 6 1000# square bales on it and can cruise at 65. I know on the FE 360 you need to advance the timing from the orginal 6 degrees to up around 10 degrees. This completely changed mine from a dog into a truck that will keep up with my F100 with a 360.


Check out the Ford truck site it is very good and you will get some great answers there.
Bob

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Truck

04-30-2003 05:44:24




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
Sometimes the spark plug wire heat shields come in a Felpro Gasket kit if you're real lucky. THe heat stove for the air cleaner cold weather intake you will need to fabricate. Won't affect power, tho.
Is it possible the timing chain has stretched and cam timing isn't optimal anymore?
Truck



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ray

04-29-2003 07:53:01




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
What does it have for a rear end? Mine has a 4:11 with a T-18 4 spd(granny gear- manual). It pulls well just can't be in a hurry to get somewhere. Its powered by a FE 360 and its a 71.

Post the question on>Link
someone>Link will help you out.



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PatM

04-29-2003 06:00:00




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
I've got 76 3/4 ton "Trailer Special" extended cab w/ long box.

It doesn't accelerate like you'd think a 460 oughta, but it will cruise (even pulling a stock trailer w/ 11 cows) steadily at 70 or so across eastern Colorado and Nebraska. That 3 speed auto is part of the problem, just not enough gears.



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Matt

04-28-2003 20:30:19




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
I guess I should give everybody the specs on this truck...
It has a 7.5L 460 Big Block and an automatic transmission. Don LC was right when he said it is a heavy truck. It's a 1-ton dually and weighs a good 7,000lb+ empty. The truck was an ambulance that was converted to a rescue rig, so the equipment box on the back is custom. And for 4-wheel drive nuts, it has an 18,000lb Ramsey industrial winch mounted on the front. I did some more work on it today, and it's working pretty good now, it just doesn't hold a tune though. I appreciate the e-mail return I have been getting.

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carhartted

04-28-2003 17:18:43




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
What engine does it have? If it has a 351M don't expect much more that what you've got.

I have a 78 Bronco with that engine and it is a peice of crap. I can't do anything to help it because of emmisions standards.

The heat sheilds are there for the heat stove on the air cleaner. It pulls air across the exhast manifolds to heat it up then up to the air cleaner. This faciliates good fuel vaporization in cold weather.

Jonathan

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T_Bone

04-27-2003 22:05:07




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
Hi Matt,

Use LP vapor to diagnose a fuel or electrical problem. I use a small Coleman LP cylinder with needle valve and rubber hose to the air cleaner.

Add a "little" LP vapor (no liquid propane) and if the problem goes away, (miss, engine smooths, etc) then it's fuel realated.

If it doesn't improve then it's electrical/mechanical causing the problem.

I retired my 76 Dodge Power Wagon a couple years ago and had a terrible problem with vapor lock when I had to use alcohol base fuel. A short piece of rubber fuel line will usually help but it didn't here.

You could always make new heat shields from sheet metal.

T_Bone

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Don LC

04-27-2003 20:53:14




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 Re: 1979 Ford F350 in reply to Matt Chambers, 04-27-2003 18:11:06  
I think part of your problem is the weight of the body they have installed on the chassis....If you will notice the larger units are mounted on Fords....That is because G.M. & Chrisler did not put their largest engine in the van chasis..... I think G.M. has started too now..... that thing is heavy, empty.....



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