Smog problems
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Senior User
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From: NOR CAL
Smog problems
I resently had the heads on my 79 f250 4x4 460 rebuilt and when the technician was putting it all back together he noticed that the heads that were just rebuilt had no place for air injection and that before it was just set up to look put together. It all works and it is all there.
It originally had a 400 in it.
What I am wondering is if it not being connected would it effect the emmisions it lets out during a test.
I am just thinking I should make it look put together again and hope the smog guy doesn't catch it.
It originally had a 400 in it.
What I am wondering is if it not being connected would it effect the emmisions it lets out during a test.
I am just thinking I should make it look put together again and hope the smog guy doesn't catch it.
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you may be mistaken on that, one of my friends had an 87 4x4 with a 460 in it from the factory. I could be off a year or two but I am sure it was a 460 because I gave him another motor out of a Lincoln I had and helped him replace it...Neil
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one other thing I thought about, my 78 F250 was a leaded fuel truck OEM so I think all it had was an EGR I am not positive on that but it didn't have much smog stuff when compared to the F150. I am not sure what year they started requiring the 3/4 trucks to run unleaded fuel with all the smog junk assoc. with it
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No 460 4x4 in 73-79 and this is a 79 truck we are talking about in the 73-9 forum. We are not talking 87 trucks. There are many threads here that will confirm this.
Unleaded fuel was tied to GVWR but I believe that 78 was the last year for an F250 with leaded fuel, my 78F250 runs leaded fuel also with EGR and no cats. The 79F250 probably requires cats, pumps, and EGR.
It sounds like his truck has a pump but no place to make it work.
Most inspectors would just reject it based on the lack of a 460 engine being available. They would have no specs on it. Some states would allow the vehicle to be tested to a later years specs when the 460 was available like "1987" but he would have to have all the equipment functioning as required for that year.
Unleaded fuel was tied to GVWR but I believe that 78 was the last year for an F250 with leaded fuel, my 78F250 runs leaded fuel also with EGR and no cats. The 79F250 probably requires cats, pumps, and EGR.
It sounds like his truck has a pump but no place to make it work.
Most inspectors would just reject it based on the lack of a 460 engine being available. They would have no specs on it. Some states would allow the vehicle to be tested to a later years specs when the 460 was available like "1987" but he would have to have all the equipment functioning as required for that year.
Last edited by Torque1st; May 17, 2006 at 06:57 AM.
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First, if the inspector asks what motor it is, look dumb and say "The door sticker says it's a 400".
Put it back together so the air injection "looks" connected.
Air injection is one of those "We think it will reduce a certain emission". Does it? Not really, it was just a theory ...
Notice all the new motors that don't have ANY air injection? because it doesn't do anything.
So, in a "sniffer test", air injection will do nothing to any emissions that they test for.
I think the MTBE/Ethanol blended (oxygenated) gasoline takes care of whatever they were trying to reduce with air-injection.
Put it back together so the air injection "looks" connected.
Air injection is one of those "We think it will reduce a certain emission". Does it? Not really, it was just a theory ...
Notice all the new motors that don't have ANY air injection? because it doesn't do anything.
So, in a "sniffer test", air injection will do nothing to any emissions that they test for.
I think the MTBE/Ethanol blended (oxygenated) gasoline takes care of whatever they were trying to reduce with air-injection.
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Get the engine running as efficient as possible.
That's the only way to pass the emission test.
Before you go,
Install New Air filter
Change The oil and filter
Adjust Carb and Timing to lean out mixture
Make sure sparkplugs are buring clean if not replace before test.
Have fresh gasoline in the tank.
That's the only way to pass the emission test.
Before you go,
Install New Air filter
Change The oil and filter
Adjust Carb and Timing to lean out mixture
Make sure sparkplugs are buring clean if not replace before test.
Have fresh gasoline in the tank.
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From: NOR CAL
First of all I live in California and the vin told me that it was made in San Diego so I have every single smog dodad ever thought of, and the strictest rules.
Also it is true that in 79 they started using unleaded and requiring cats, and other smog equipment on 3/4.
Finaly ford only offered the 460 on 4x2 trucks until the mid 80's.
Mine is a second engine thats why the smog stuff doesn't connect.
I pick it up Friday from ford and I can't wait to do a nice 20ft. burnout
since it did 15ft. with bad heads.
Also it is true that in 79 they started using unleaded and requiring cats, and other smog equipment on 3/4.
Finaly ford only offered the 460 on 4x2 trucks until the mid 80's.
Mine is a second engine thats why the smog stuff doesn't connect.
I pick it up Friday from ford and I can't wait to do a nice 20ft. burnout
since it did 15ft. with bad heads.
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Joined: Apr 2001
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From: Eustis FL
The test more likely to fail is the visual test; I.E. looking for the factory smog equipment. I think that is the point he is getting at, folks...
If every truck in that year had a certain smog device, you may need to get that stuff put on there, even though the 460 was alien in a 4X4 that year. Compare to the 2wd in that year that had a 460. Might find what you need in a California junkyard. Rip it off after the test!
I haven't seen an actual air injection system in use in a truck. I have seen the bosses cast in heads for that provision, however...
My '76 and '78 were leaded fuel trucks. 78 had EGR only. No A.I.R. or catalytic converter.
Mark
If every truck in that year had a certain smog device, you may need to get that stuff put on there, even though the 460 was alien in a 4X4 that year. Compare to the 2wd in that year that had a 460. Might find what you need in a California junkyard. Rip it off after the test!
I haven't seen an actual air injection system in use in a truck. I have seen the bosses cast in heads for that provision, however...
My '76 and '78 were leaded fuel trucks. 78 had EGR only. No A.I.R. or catalytic converter.
Mark
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From: NOR CAL
All of the equipment is there and nothing is missing. It all works perfect it just needs to look connected for the visual inspection. If nothing else is wrong it will pass the "sniffer."
In 79 they put on A.I.R, EGR, and cats all together.
In 79 they put on A.I.R, EGR, and cats all together.
Last edited by 1979FordF-250; May 18, 2006 at 12:09 AM.
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I have a 79 with a 400 in it the 400 was just put in new in 2000, and it has every smog part on it you can think of, egr and everything. i cant get it to pass smog but im working on it. whats the timing supose to be for this year? also i have a vacume leak so thats part of my problem. I also have a CAT. and I live in the great state or CA also
chris
chris