Failed Smog, HC(PPM), CO, NO (PPM) too high
06-05-2012, 01:57 PM
#1
Failed Smog, HC(PPM), CO, NO (PPM) too high
Edited with working pics
1992 Honda Prelude 2.3si
Luckily I saved my test from two years ago
Test from 06/2010 - only thing changed after the test was on 11/2011 distributor, and a few screws on my gas tank (also had a stock filter on in 2010, 2012 I have KN reusable cone filter)
2010 test - pass
2012 test - failed
My 2012 results are so high compared to my 2010 tests. Any ideas, the guy says my timing looks off. Do I need to advance the timing on my car? Would that only fix one of those? Should I run any fuel cleaner or seafoam through the car? Thanks for advice.
think I'm going to retard the timing first, and change the air filter, oil, and seafoam it.
1992 Honda Prelude 2.3si
Luckily I saved my test from two years ago
Test from 06/2010 - only thing changed after the test was on 11/2011 distributor, and a few screws on my gas tank (also had a stock filter on in 2010, 2012 I have KN reusable cone filter)
2010 test - pass
2012 test - failed
My 2012 results are so high compared to my 2010 tests. Any ideas, the guy says my timing looks off. Do I need to advance the timing on my car? Would that only fix one of those? Should I run any fuel cleaner or seafoam through the car? Thanks for advice.
think I'm going to retard the timing first, and change the air filter, oil, and seafoam it.
Last edited by Bearcat94; 06-05-2012 at 11:08 PM. Reason: fixed pics & merged posts
06-05-2012, 11:10 PM
#2
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'92 Prelude (not 3G TL). Moved to Car Talk.
06-06-2012, 12:11 AM
#3
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Yes, you should adjust the timing due to the change of the distributor back in Nov. Set the timing to stock specs if it isn't set there now.
While you're at it, might as well adjust the valves if they haven't been adjusted in the past 30K or so miles.
Make sure the car is warmed up before the smog test.
BTW, some smog places will test, let you tune/adjust, and then retest without an additional fee.
While you're at it, might as well adjust the valves if they haven't been adjusted in the past 30K or so miles.
Make sure the car is warmed up before the smog test.
BTW, some smog places will test, let you tune/adjust, and then retest without an additional fee.
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