Non-catalyst

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Apr 6, 2009 | 10:44 AM

#16

Jermafenser

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Joined: Jul 2001

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From: MD

Quote:

Originally Posted by 03scf250

Before I bought my 78 I did some research because I didn't want to have to mess with emissions crap. If memory serves me right this is what I found. In 1975 the federal gov set the weight at 6000 lbs, anything registered under that had cats and all the other crap. Anything over wasn't. California trucks were different I believe because Cali had their own standards. Ford made the F150 (registered at 6050) over the weight cap so they don't need emissions crap. All that my 78 has is a Pcv avlve and Egr. Then in 1979 the gov upped the weight to 9000 lbs, so now even my F250 (8800 lbs registered) has to have all the crap. If I'm wrong somebody please correct me it's been over a year since I looked all this up and I didn't save any of the sites I found the info on.
With the truck being 33 yrs old I would just find somebody that would pass it and not worry about it.

You are correct. Any F100s manufactured 1975 MY onwards required the full emissions package thus the debut of the F150 sometimes dubbed as "heavy half-ton". This worked until 1979 when EPA raised it to 8500.

Although it wasn't 9000, it was 8500. 1979 F350s still could be purchased without the emissions requirements as the base F350 was 8550.

Apr 6, 2009 | 11:37 AM

#17

Jermafenser

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Joined: Jul 2001

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From: MD

Quote:

Originally Posted by Bear River

Look, it has the non-catalyst sticker. Anyone here claiming it had a converter at one time doesn't know what they are talking about. And that is a legitimate door sticker. Door stickers can't be transfered to another vehicle either, they will tear apart unless something dissolves the adhesive. There should be another sticker under the hood which will tell the vehicles smog equipment, and it will say NON-CATALYST as well.

You are the one who doesn't know what the hell you are talking about.

I have seen countless stickers on these trucks, and that sticker is NOT legitimate. That is from an entirely different vehicle cut up. What makes you think a PO wouldn't do that?

Ford never put anything on the doors except the warranty plate and sometimes the maintenance decal. There is no part number on it, either. Plain and simple, someone broke the law modifying the emissions system.

What do YOU know about these trucks? Do you have research, facts, literature, and part catalogs to to back these up? I highly doubt it.

Ford and EPA sez: 1976 F100 had a catalytic converter, no ifs and buts.

1976 F100 GVW: 4800-5700. EPA cutoff: 6000. What does that add up? A catalytic converter.

Do you see what I see? That's right, a catalytic converter!

D5TZ5E212B - catalytic converter assembly - 1975/76 F100 6 and 8 cyl 300, 302, 360/390.

D5TZ5K282A - converter shield (lower) - 1975/76 F100 6 and 8 cyl 300, 302, 360/390.

Now who doesn't know what they are talking about? YOU.

Apr 6, 2009 | 12:31 PM

#18

cmullins

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Joined: Mar 2009

Posts: 66

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From: Rochester, MN

Quote:

Originally Posted by Billy4416

Mine is the F-100 XLT. It does not have the fuel restrictor or the cat, but it does say "unleaded fuel only" on the fuel gauge. I bought the truck from the second owner, whose brother was the first owner. I have looked and researched and asked questions from every person I can think of, and still get various answers. Even the owners manual uses the phrase "if equipped" when talking about the cat. I was planning on installing a cat myself just to be on the safe side, but if it doesn't have to have it, I won't.
I just want to make sure my truck is legal so I don't get into any trouble down the road, or end up with a truck I can't drive. Of course in 2 years it will be exempt from NC inspections so I will have no worries at all.

If you want it legal you are going to have to put the cat back on. My 250 said non-cat on it but it was on the engine decal. The cutoff in that year was 150 and there were 3 things associated with that - cat, fuel inlet restrictor, and gas guage stating unleaded. Looks like someone took off the cat and opened up the fuel inlet so that they could get the regular nozzel in but did not fully cover the tracks by replacing the guage. As far as the door sticker, not sure there but perhaps someone replaced the door off of a much heavier truck or something. As I said, I was an inspector back then and a lot of folks were doing that stuff back then for performance and to avoid unleaded fuel.

That said, all that still does not change the original specs or todays laws surrounding emissions. Owners choice on what to do on this one. It is clearly a personal decision for you to make.