Failed smog today

[KKiley]

Well, it does close, got it hooked up. But it didn't take anywhere near 5 minutes. It was completely closed in less than 2- 3 minutes. Maybe it needs to stay open a little longer until the engine is fully warm? Does the adjustment do that?
Thanks
Kevin
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1978 Super Beetle convertible

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[busdaddy]

http://www.thesamba.com/vw/forum/viewtopic.php?t=645985&highlight=aar
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Rust NEVER sleeps and stock never goes out of style.

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[Randy in Maine]

I clean mine now with Gibbs Lubricant.

Your freezer and a hair dryer are tools to be used here.

[KKiley]

Ok gentlemen, I have verified the AAR is functioning correctly and we are back running. Cold start is fine. Once it is running for about 2 minutes, it still drops the idle. It will come back once it is warm.
Bill, I tried your suggestion tonight and unhooked the fuel pressure vacuum line tonight when it wouldn't idle and it idled perfectly. And the miss I was feeling went away. So making it richer is the goal.
What direction should I be looking at now?
Thanks
Kevin
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1978 Super Beetle convertible

Click to view image

[ps2375]

Have you tried the resistors yet?

[KKiley]

Haven't tried the resistors yet. I think it's a great idea. One thing bad about Radio Shack not being around, lol. I don't have anyplace close to go purchase some. Fry's is about 15 miles away up the 405, which is not fun...
I will buy a variety, just want some idea of which ones so I can do it in one trip.
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1978 Super Beetle convertible

Click to view image

[ps2375]

Like posted earlier, start with 100 ohms and add one or two to that if needed.

[KKiley]

Thanks ps2375, I will give that a try and pick up a variety pack. Understanding this system better, it makes perfect sense.
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1978 Super Beetle convertible

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[JKLNHYD]

Does this sound like an oxygen sensor?
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Jon
1971 1776

[KKiley]

No oxygen sensor on a '78, they were only on '79 CA versions
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1978 Super Beetle convertible

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[JKLNHYD]

Ah, ok.

I wrestled with smog on a '79 f250 for a year, so I am rootin for you.
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Jon
1971 1776

[Al Capulco]

For what it's worth....the state of Ca. makes it almost impossible to pass smog with pre '95 cars. I have a '79 bug that runs perfect and can't pass the current smog test unless I take it to my mechanic and let him dial it in with his old smog machine. Then he runs it down to the test station, it passes and then he has to dial it in to run right. Been doing this for 20 years!

[KKiley]

Well, it passes on the high speed with room to spare, just failed on the idle HC's. It does have a low idle tremble, that went away when when I unhooked the fuel pressure regulator, so I think the resistor will add fuel where it needs it to pass. Just a micro adjustment will do wonders I think.
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1978 Super Beetle convertible

Click to view image

[EVfun]

if the lean condition is just an idle problem you can keep closing the air bypass screw on the air flow meter. It changes the running mix very little, but has a pronounced effect on the idle richness. Adding some resistance to the temp sensor is another fine idea, but that should richen the mix at any rpm by making the "computer" think the engine has not fully warmed up.

You can make adjustments to the air flow meter too, there are 2 adjustments for the variable resistor, one changed the return spring tension while the other shifts the base point for the variable resistor. This is much more of a PITA though, best done only if you can tune the engine with a exhaust analyzer checking the mix prior to the catalytic converter.
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[JKLNHYD]

Is your bung plugged?
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Jon
1971 1776

[rockerarm]

Hi. That's good news Kevin. This is progression. As far as resistors go, in my general area there is an electronics store call All Electronics Corp, www.allelectronics.com, and you could shop their site at home and order. These resistors seem to be dirt cheap and looks like a minimum order is 10 pieces, at about .60 each. They are in Van Nuys, Ca.
I have a Frye's about a mile from me if you want I can go over there for you.

It would be nice to know if the removal of this vac line richened up enough to bring the HC down into compliance. Also the ability to sniff the exhaust prior to the cat and after would tell you how effective the cat is working.

Does the shop that did the initial smog offer free retest? Wonder if they would do a pre-test to see if the improvement brought the HC down, but, as important, did not raise the CO. If it did a minor adjustment to the AFM screw might bring the CO down.
Hope this helps, Bill.

[rockerarm]

[glutamodo]

[JKLNHYD]

Fed emissions and Cal emissions are totally different though, even to this day. I am not debating you, just saying. I didnt know that you could have a cat without having an O2 sensor.
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Jon
1971 1776

[glutamodo]

Put it this way, if VW was already making a O2 sensor California Beetle in 1979, they could have just made that as the 49 state model for model year 1980. They didn't.
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Andy T.


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