my hc(ppm) is too high.. what do I do?!


Dyno Don
Supreme Member
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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.
i have brand new injectors bosch III old ones were ohming low...maybe it killed my o2?
Junior Member
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
Supreme Member
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,
Supreme Member
Quote:
If the engine is stock, are you using 22lbs injectors?Originally Posted by 92purplehaze
i have brand new injectors bosch III old ones were ohming low...maybe it killed my o2? 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.
theyre 22lb injectors the car has a 350 but is tested as 90 irocz 305 700r4
oh and i picked up the totalled 02 ss today will post pics tomorrow
Could having the fan running with key on have had hurt my #s? I go for a retest tomorrow................
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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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Quote:
Originally Posted by 92purplehaze
Could having the fan running with key on have had hurt my #s? I go for a retest tomorrow................ That does typically fail you. It causes the car to run rich and throws everything else off
My car likes to run about 140-160 around town.So i took the air dam off to spike the temp into the 200-210 range.
swapped wires, cap, rotor, coil, plugs, and 02 sensor still didnt pass. ended up paying under the table, no lube.

I know the feeling.Least now you dont have to worry about the registration while doing the swap.




