My 4 banger failed hydro carbon side of Emissions test, what can I do to pass?
2006-09-11 06:33:21 · 6 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
Install new spark plugs, add a couple of octane boosters, or put in 5 or so gal. of Premium gas. Check your coolent level and coolant, fill with strait coolant if not up to the top. How's that air filter, replace if dirty, its only 3.00 bucks. How's the oil? If it's filithy grab 4-quarts and a new filter. Look there you've only spent $22.50 now go pass that Emissions test!
2006-09-11 06:51:24 · answer #1 · answered by Anonymous · 3⤊ 0⤋
You aren't specific about the make/model of your car, so here are some general points:
1) HC is unburned fuel, It went into the engine, and right back out again. Never lit off.
2) CO is partially burned fuel, got lit up but the fire went out before complete combustion and consumption.
NOx is the result of high pressure (compression) + extreme (> 2500 deg F) heat.
CO2 is the result of COMPLETE combustion. (along with water vapor).
If you failed the HC, you MAY need a tune-up, but probably not. More than likely, a vacuum leak, advanced ignition timing, dirty air filter, excessively dirty oil, failing oxygen sensor, inaccurate temp sensor, Mal-adjusted carburetor, weak fuel pressure, stuck EGR pintle. AS you can see, there are a host of things that will cause this.
Each car / manufacturer has its own pattern failure weak spot. But at least mow you know where to look.
If this is all a bit foreign to you, or beyond the scope of your ability, it would be wise to take it to a LICENSED smog shop for diagnosis and repair.
They want to keep their license, so they are LESS likely to scam you. They will make necessary repairs and/or adjustments to see that the vehicle passes.
Good Luck
2006-09-11 14:15:37 · answer #2 · answered by Ironhand 6 · 1⤊ 0⤋
are you in California ?
sounds like it needs a major tune up and sensors go to a reputable shop or the car makes service department
tell the service writer what happened
get an estimate
might be time for a newer car if the bill is to high to repair this one
what is the age of your car?
2006-09-11 13:38:52 · answer #3 · answered by jimbo_456 1 · 0⤊ 0⤋
High HC indicates a misfire. Get a good tune up and include a compression test for the general engine condition.
2006-09-11 13:37:40 · answer #4 · answered by yes_its_me 7 · 0⤊ 2⤋
if all else fails,they make a can of stuff that you pour in your tank that gaurantes it passes inspection,ask your auto parts place
2006-09-11 13:46:08 · answer #5 · answered by john doe 5 · 0⤊ 0⤋
Get a tune up... buy some Smoke-B-Gone from autozone...put in hi ocatane gas...that should help.
2006-09-11 13:36:21 · answer #6 · answered by FORD on FIRE 4 · 0⤊ 1⤋