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> Smog Test, Can't pass cruise CO
jaminM3
post Apr 20 2011, 12:02 PM
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I have searched the forum and I can't find any info on getting your car to pass the smog test?

I have a '74 with a 2.0. It passed in fall of '09 and I drove it to RRC. The only thing I have done since then is relocate the gas pump to the front. This has successfully stopped the vapor locking issue.

Does somebody out there now what I need to do to adjust the FI? It passes the idle test fine but the cruising test fails for Carbon Monoxide. You can smell it too. I think it is running pretty rich.

(IMG:style_emoticons/default/confused24.gif)

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r_towle
post Apr 20 2011, 12:14 PM
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could be a bad or failing mps, an TPS adjustment issue, or a CHT issue.
It can also be your cold start may be stuck open, that also happens.

Check here for the tests on the TPS, CHT and MPS

http://members.rennlist.com/pbanders/DjetParts.htm
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r_towle
post Apr 20 2011, 12:15 PM
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Also, do the simple stuff first.
Tuneup, new points, plugs, cap and rotor.
Set valve adjustment
Set dwell
Set timing.
In that order...

Rich
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Andyrew
post Apr 20 2011, 12:38 PM
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Do you have the printout you can scan? Or tell us the numbers? This way we know how far off you are.
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championgt1
post Apr 20 2011, 12:41 PM
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Damn, I'm glad I don't have to do this.
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Mike Bellis
post Apr 20 2011, 12:47 PM
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If you buy a 1976 914 here you face this same crap.
Mine is exempt from testing! (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif)
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Drums66
post Apr 20 2011, 02:06 PM
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QUOTE(championgt1 @ Apr 20 2011, 11:41 AM) *

Damn, I'm glad I don't have to do this.


I hear you! (IMG:style_emoticons/default/poke.gif)
(IMG:style_emoticons/default/smoke.gif) (IMG:style_emoticons/default/bye1.gif)
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Eric_Shea
post Apr 20 2011, 02:36 PM
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Standard UT BS.

Mine are registered at my "SUMMER HOME" (cough-cough) in Heber.
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76-914
post Apr 20 2011, 03:34 PM
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IIRC, there was member here who had quite an extensive thread related to smoking in AZ. I think the member was Armyowalgreens???
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Rand
post Apr 20 2011, 03:43 PM
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QUOTE(Eric_Shea @ Apr 20 2011, 01:36 PM) *

Standard UT BS.
Mine are registered at my "SUMMER HOME" (cough-cough) in Heber.


Eric, does the registration address not have to match the one on your driver's license?

I was smog exempt in Seattle, but here in Reno it has to be smogged every year. (IMG:style_emoticons/default/headbang.gif)
I thought about using my friend's address in Gardnerville to get around it, but wasn't sure that would fly with a Reno address on my license. I thought they checked that.

I don't know how it works everywhere, but here a classic or historic registration and plate takes you out of the system... Get past smog once, get the status, then done.
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jaminM3
post Apr 20 2011, 04:04 PM
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It says the CO% standard is 5%, mine tested 7.36% and 10.4% last fall when I tried it the first time. I brought it to a local mechanic to install the 911 front suspension and brakes and had him look at the tune. That is why it went down.

It passed the year before and I only drove it like a thousand miles.
You can smell it, there is something wrong with the tune.
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r_towle
post Apr 20 2011, 04:13 PM
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valve adjustment
dwell
timing
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Dave_Darling
post Apr 20 2011, 09:20 PM
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Fuel pressure, CHT resistance, vacuum leaks (esp fuel injector seals, MPS hose, manifold), MPS failing...

Look through the articles on Brad Anders' website (link in Towlie's first reply).

--DD
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moparrob
post Apr 20 2011, 09:27 PM
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Long live Webers... (IMG:style_emoticons/default/poke.gif)
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ArtechnikA
post Apr 21 2011, 10:24 AM
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QUOTE(jaminM3 @ Apr 20 2011, 06:04 PM) *

It says the CO% standard is 5%, mine tested 7.36% and 10.4% last fall

Are you running premium gas?
Stop.
run the lowest octane that will prevent detonation, at least for the duration of the test.
Higher octane == more resistance to burning.
unburned fuel == high CO.
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Drums66
post Apr 21 2011, 11:31 AM
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QUOTE(r_towle @ Apr 20 2011, 03:13 PM) *

valve adjustment
dwell
timing


....Also get her good & hot....before testing (IMG:style_emoticons/default/idea.gif)
(IMG:style_emoticons/default/bye1.gif)
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