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Discussion Starter #1
I have a 92 FWD fleetwood 4.9 V8. w/ 120K miles.
I just failed a smog check in California.

@ 15 MPH, everything went alright, however;
@ 25 MPH, my CO% is 0.00 and my NO is measured at 703, with the State
s Max listed at 701. This is where I failed the smog check.

Any suggestion, any recommondation is greatly appreciated.

I have some problem with motor oil leak, and I suspect the fuel pump is failing also. Would they contribute to some problem in terms of smog check?

DSulu:confused:
 

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dsulu said:
I have a 92 FWD fleetwood 4.9 V8. w/ 120K miles.
I just failed a smog check in California.

@ 15 MPH, everything went alright, however;
@ 25 MPH, my CO% is 0.00 and my NO is measured at 703, with the State
s Max listed at 701. This is where I failed the smog check.

Any suggestion, any recommondation is greatly appreciated.

I have some problem with motor oil leak, and I suspect the fuel pump is failing also. Would they contribute to some problem in terms of smog check?

:confused: Have you tried running a tank of high octane through it before you take it for the test ? Also maybe a good injector cleaner. I would try the injector cleaner first, then the tank of good gas. Sometimes the crud that gets blown out by the injector cleaner, needs to be flushed out by the good gas. Good luck. martyp.
 

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White Diamond '03 DHS (with DTS floor shift)
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Check for any stored DTC's. Also be sure the engine is up to normal operating tempurature. Take it out for a good highway run before going in for the test.

I am not sure what those numbers mean but I believe it has been discussed before. Do a search and you might get more info.
 

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1991 Sedan deVille 4.9L/1994 Lincoln Town Car 4.6L
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258 Posts
Run some high octane fuel, and some serious (I recommend Lucas) injector cleaner. Then make sure your engine is up to operating temp. Since you only failed by a few points it should be easy to clean it up _just_ enough to pass. But you probably need a new catylytic convertor.
 

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1989 Fleetwood FWD / 2000 ETC / 2000 STS / 2006 STS V-8 1SF RWD
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475 Posts
Hello...

There are several things you can do to prepare for the retest:

-check for codes (press and hold "off" and "warmer")
-check that EGR is not clogged (R+R)
-check that O2 sensor is good (R+R)
-check that throttle body is clean
-check that spark plugs/wires are good (R+R)
-check air filter/pcv
-fill up with premium before retest (be careful with additives)
-turn off A/C during retest

This has helped me.
Post back your solution.
 

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'91 Fleetwood Coupe, '95 SLS
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196 Posts
dsulu said:
failed a smog check in California. Snip
NO is measured at 703, with the State
s Max listed at 701. This is where I failed the smog check. Any suggestion, any recommondation is greatly appreciated. DSulu:confused:
~ dsulu: Oil leak & fuel pump No. Have you tested the injectors? Bad injector/injectors can give that reading. These cars properly tuned can pass smog with-out a Cat, but..... Rule out the injectors!
Skullman {:{}
My Fleetwood Coupe
http://www.cardomain.com/ride/406096
 
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