failed smog thread.....
03-15-2011, 01:59 PM
#2
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Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: failed smog thread.....
Notice your NOX is low and HC high, that usually means the 02 might not be working, or a bad injector, check them with an ohm meter, should be 12-18 ohms.
When the NOX is low, that indicates cool combustion ie. rich mixture.
When the NOX is low, that indicates cool combustion ie. rich mixture.
03-15-2011, 02:32 PM
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Car: 1987 tpi camaro not sure of motor
Engine: 5.0 tpi
Transmission: 5spd
Axle/Gears: posi track rear end gears unknown
Re: failed smog thread.....
well when i failed emissions on my car everything failed. So what i did was i bought some techron fuel injector cleaner and filled my tank then poured it in and ran it for about 100 miles then i bumped my idle up to about 900 and the day i was scheduled to take the sniffer test i drove it on the freeway for about a half hour till it got nice and warm and then went right to the testing station and had them pull it in without shutting off the car. Since i did that it passed with flying colors also check your plugs and timing
03-15-2011, 05:06 PM
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Car: 1986 Grand Prix TPI
Engine: 350 TPI
Transmission: 200 4R
Re: failed smog thread.....
Which of your cars is that so I can add it to my chart.
make, model, year, engine, year, trans,
make, model, year, engine, year, trans,
03-15-2011, 08:00 PM
#7
Re: failed smog thread.....
That was my issue as well.I retarded the timing a couple (maybe more) degrees & raised the idle speed a couple hundred too.Plus the unsual, inpect/clean plugs,check/replace cap & rotor.I also poured a bottle of that Lucas fuel/octane booster thing.
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03-18-2011, 12:33 AM
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Car: '92 Camaro
Engine: 350 TPI
Re: failed smog thread.....
do you have the A.I.R. system in? I didn't when I inspected and that's how my smog failed.... just throwin' the idea out there
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