So...I failed Emissions

[buhnahnuh]

Well i failed emissions today, and I am looking to see if people have had the same problem or have any remedies. Basically what the guy said is that I have to much un-burnt gas out of the back pipe.

I am starting a sem-list of what might cause that, please correct me if wrong.

-Vacumme Leak
-Air/Fuel filter
-Fuel pressure regulator
-Loss of compression or compression change? not sure about this one
-Injectors???

Please help, any input is appreciated and Jordan I have heard you know your stuff and have an m42, please weigh in if possible


Thanks

[Farbin Kaiber]

Please post your numbers so I can tell you whats wrong.

[Erick]

O2 Sensor

[buhnahnuh]

HC (PPM)
cruise limt: 160
Cruise emissins: 125
Cruise result: PASS

Idle: 220
Idle Emissions: 852
Idle result: FAIL

Just the idle emissions did not pass

[Farbin Kaiber]

I need CO%, NO (ppm), HC (ppm).

[Farbin Kaiber]

High HC is rich condition.

[buhnahnuh]

CO% -- CO+CO2% -- O2%
crusie limit -- 1.2 -- 6 -- N/A
cruise emissions -- .32 -- 15.72 -- .3
cruise result --PASS -- N/A -- N/A
idle limit -- 1.2 -- 6 -- N/A
idle emiss. -- .14 -- 14.54 -- 1.64
idle result -- PASS -- N/A -- N/A

[Jparkr]

HI MATT!!!! in before your banned

[strad]

My M42 showed 198 out of 220 HC at idle on the emissions test performed before I bought it. After correcting the biggest vacuum leak (valve cover-four way hose was unplugged at four way hose) the next test showed 88 out of 220. Your problem is a helluva lot bigger than that though so I don't know all the places you might need to look besides vacuum leaks.

[buhnahnuh]

I Think I Know What Is Wrong

I took it to a shop and he ran checks on all possible scenarios and all of them were inconclusive. I did not realize the performance chip i put in would affect it that much. I am going to take it out tomorrow and go through DEQ again. hopefully everything goes smoothly.