fail emission test

[brian]

Please help
1989 Trans am 5.7 I have fail emission test for the 3 time. I have all ready replace or change a vavle job , cat, plugs, wires, cap&rotor, pvc, air filter, timing chain , o2, check timing, injectors, injector cleaner, coolant, oil, sensor, mass sensor and still 2 time the HC limits 1.80ppm. the CO's are very low. I havent change the egr valve but I thing it only controls NOX. Any ideas or help would be great.


Thank's
Brian

[Jeff_in_Atl]

How far did you drive the car before you got the emissions checked?

[brian]

fail emission test

Drove car about 20 mins opening it up on highway.

[Jeff_in_Atl]

Well that should be plenty to get the converter hot. I didn't one time and failed. I then went and drove it for about 10 minutes, came back and it passed with flying colors. You still have the converters on right? What temperture thermostat is in it?

I saw this stuff at the store that said guaranteed to pass inspection. It was a fuel additive.

I'm hoping someone else here can suggest something.

[brian]

emision test fail

Still have the cat on. thermo stat unknown.

Thank for your help.

Brian

[Mirroredshades]

In NC there is a limit of either $250 or $500. If you have receipts proving that you have tried, they have to pass you for another year. Maybe Ill has a similar provision.

[ital_stalion]

try your gas cap b/c i failed my immisions test with that little problem. you should get your injectors cleaned out or even to polish out your block, to remove any of the carbon build up throught the years of wear and tear.

[raul.garcia]

Failed

My sister had the same problem with her 89 suburban, she ask me if there was anything she could do, she had done all you did less the valve job, I told her, "you've done all you can, take it to the station I sent mom to," she past with flying colors.

[Joe 1320]

Try the pass the emissions test in a bottle. Seen it work several times on cars in the state of tune about like yours.

[Maverick_82]

Please help
1989 Trans am 5.7 I have fail emission test for the 3 time. I have all ready replace or change a vavle job , cat, plugs, wires, cap&rotor, pvc, air filter, timing chain , o2, check timing, injectors, injector cleaner, coolant, oil, sensor, mass sensor and still 2 time the HC limits 1.80ppm. the CO's are very low. I havent change the egr valve but I thing it only controls NOX. Any ideas or help would be great.

How about listening to someone from illinois himself!?

Excessive levels of hydrocarbons(HC) are caused by an insufficient level of oxygen in your pressurized air, leaving behind unburned fuel (hydrocarbons). The problem's in your air pump. A new air (smog) pump for an '89 t/a can be ordered off of RockAuto.com for $49.79. A new pump should greatly lower your Hydrocarbon levels.

Mirrorshades brings up another point. In illinois i believe it's at least $450.

Check out this site!
http://www.epa.state.il.us/air/vim/e...d-testing.html

[DeWynter]

I sure am glad I have no emissions here....

[Jay 02 TA ws6]

I sure am glad I have no emissions here....

Me too YAY Michigan!!!!

[Injuneer]

..... and still 2 time the HC limits 1.80ppm. the CO's are very low.

Thank's
Brian

Not sure I understand what you said.... are you saying you failed on HC becasue it was too high, and passed on CO because it was low? Do you have and can you post both the "standard" they measure against (what is required to pass) and the actual values for your tests, for HC, CO and NOx?