Emissions help
#1
Emissions help
Recently failed MA emissions and need help figuring out why. I recently replaced my O2 sensors so I know its not that. I even had installed a NRP catback s.s. exhaust. I'm hoping that the problem isn't with the catalytic converters. Anyone have any information?
The exhaust really stinks (like rotten eggs (literally)).
thanks
Oh and the test results:
CO2 at 2390 RPM was 13.6
at idle they were 13.2
CO was 3.05 at 2428 RPM
at idle they were 2.93
HC was a range of 140 to 149
the test failed at CO because the cut point was a 2 and I scored a 3.05 so i'm not sure what the cut point for CO2 was.
The exhaust really stinks (like rotten eggs (literally)).
thanks
Oh and the test results:
CO2 at 2390 RPM was 13.6
at idle they were 13.2
CO was 3.05 at 2428 RPM
at idle they were 2.93
HC was a range of 140 to 149
the test failed at CO because the cut point was a 2 and I scored a 3.05 so i'm not sure what the cut point for CO2 was.
#3
RE: Emissions help
I had been running the highest octane available since i've bought the truck and I haven't done anything tune wise. What do you suggest and how do I go about doing it? I've looked at many other threads and they all seem to point to running rich but with no explanation on how to solve the problem. thanks for your help!
1992 R.R.C.
2002 SE7
1992 R.R.C.
2002 SE7
#6
Join Date: Apr 2006
Location: Denver, Colorado
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RE: Emissions help
That probably tele part of the story. If you are running on old p;ug wires and tired plugs, this would be the first place to start along with a new cap and rotor.
I would consider an engine flush a big plus as well as an induction cleaning and a tank full of good gas additive.
If you want more details, send me your tele number and a good time to call and i would be glad to walk you thru this.
Also pul one spark plug from each cylinder head and not their condition before we talk.
Mike
mikeljcaobs@comcast.net
I would consider an engine flush a big plus as well as an induction cleaning and a tank full of good gas additive.
If you want more details, send me your tele number and a good time to call and i would be glad to walk you thru this.
Also pul one spark plug from each cylinder head and not their condition before we talk.
Mike
mikeljcaobs@comcast.net
#7
RE: Emissions help
Thanks for the great info Mike. You mentioned "I would consider an engine flush a big plus as well as an induction cleaning," How would I go about doing that? Is the induction cleaning taking off the plenum chamber cap and using brakeclean or something to clean out the deposits?
#8
Join Date: Apr 2006
Location: Denver, Colorado
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RE: Emissions help
With your mileage, a engine flush would cut alot of sludge from the engine and crank case, raise the compression a little, improve the oil flow and get rid of a lot of hydacarbons.
I would do the 6 qt.s of ATF flush and clean it out good.
As for the induction cleaning, doing this will remove alot of carbon from the intake valves, also clean the throttle body to improve engine response.
If you decide you want to do some of this get in touch with me and I'll walk you thru it.
Mike
I would do the 6 qt.s of ATF flush and clean it out good.
As for the induction cleaning, doing this will remove alot of carbon from the intake valves, also clean the throttle body to improve engine response.
If you decide you want to do some of this get in touch with me and I'll walk you thru it.
Mike