Still failing emissions test
#1
Burning Brakes
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Car still will not pass emissions. In fact, it's getting worse. I have the dat from last year when it passed(Dec 2002), then where it failed(Dec 2003) and again today(May 2004)
I replaced the injectors, CAT is new from Dec 2002, new plugs, new O2 sensor 2002, new fuel rail, new fuel reg and damper, fresh oil.
The funny thing is, the car runs great.
Where should I look?????
Sorry about the size,,,I have reduced it by 75% and it still shows up HUGE...
I replaced the injectors, CAT is new from Dec 2002, new plugs, new O2 sensor 2002, new fuel rail, new fuel reg and damper, fresh oil.
The funny thing is, the car runs great.
Where should I look?????
Sorry about the size,,,I have reduced it by 75% and it still shows up HUGE...
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Looks like the engine is running a rich mixture. The HC (hydrocarbons) is high which means that some unbruned gas is getting through. And the CO (carbon monoxide) is also high, which means that the engine is not burning the HC completely (it would become CO2 then).
That's about as far as I can go with the analysis. Maybe worn injectors would cause this. Could a vacuum leak cause it, too?
How certain are you that the catakytic convertor is working? The cat is there to convert HC and CO to CO2, IIRC. Any chance that it has failed already? Also, did you check the fuel pressure at the rail? High pressure would cause more fuel in the cylinders than the DME expects.
That's about as far as I can go with the analysis. Maybe worn injectors would cause this. Could a vacuum leak cause it, too?
How certain are you that the catakytic convertor is working? The cat is there to convert HC and CO to CO2, IIRC. Any chance that it has failed already? Also, did you check the fuel pressure at the rail? High pressure would cause more fuel in the cylinders than the DME expects.
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Burning Brakes
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Yea, I can tell it is running rich,,,you can smell it.
Brand new injectors. It is an aftermarket CAT from Midas. I don't know, maybe it could fail after only 1500 miles.
I'm thinking maybe the AFM. Will have to pull it and ohm it out this weekend.
We adjusted the mixture full lean today. (Took out the plug to expose the allen screw) Did not seem to do anything.
Brand new injectors. It is an aftermarket CAT from Midas. I don't know, maybe it could fail after only 1500 miles.
I'm thinking maybe the AFM. Will have to pull it and ohm it out this weekend.
We adjusted the mixture full lean today. (Took out the plug to expose the allen screw) Did not seem to do anything.
#4
Drifting
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High CO and HC is an indication of a rich mixture. Low CO and high HC indicate a lean mixture.
At 9% CO post-cat your car should have black smoke out the tailpipe and/or the rear of your car around the tailpipe be black also. I am surprised that you say it runs great? I wouldn't expect it to run all that well if those numbers are truly representative of the tailpipe emissions. The plugs should be fouling out at a minimum.
At 9% CO post-cat your car should have black smoke out the tailpipe and/or the rear of your car around the tailpipe be black also. I am surprised that you say it runs great? I wouldn't expect it to run all that well if those numbers are truly representative of the tailpipe emissions. The plugs should be fouling out at a minimum.
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Burning Brakes
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At 9% CO post-cat your car should have black smoke out the tailpipe and/or the rear of your car around the tailpipe be black also. I am surprised that you say it runs great? I wouldn't expect it to run all that well if those numbers are truly representative of the tailpipe emissions. The plugs should be fouling out at a minimum.
Runs like a bat outta hell.
Little soot inside tailpipe. New plugs. Old ones looked real good, they only had 1500 miles on them.
Hard to believe the numbers went worse since Dec?????
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I just thought of something. Why did you have the cat replaced by the Midas unit?
#12
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Damn your not making this very easy........ What, other than what you have mentioned, has changed since it last passed?
It makes no sense to me that at 9% it dosen't smoke at all. That is what we call "pig rich", it's VERY fat. If you pull a plug it's not black? Let me think about this for a few minutes..........
It makes no sense to me that at 9% it dosen't smoke at all. That is what we call "pig rich", it's VERY fat. If you pull a plug it's not black? Let me think about this for a few minutes..........
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This was a tailpipe test, right? After the cat, not before?
Got a warranty with that cat?
OTOH, there's too much gas going through there. Maybe you're on the right track with the AF. Might check the TPS, too.
Got a warranty with that cat?
OTOH, there's too much gas going through there. Maybe you're on the right track with the AF. Might check the TPS, too.
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The single biggest change is the new injectors.
They are Bosch, BUT, they have a Chrysler part number. The pittle cap on the end is different that the plastic "hat" that were on the original. These have a concave metal pittle that's crimped on. The company I bought them from "assured" me the are a direct compatable swap.
Only thing I could imagine is they are the wrong pressure/flow rate...??
They were installed AFTER it failed in Dec 2003. Today was the first test with them installed.
Well, my throwout/release bearing is about to go out....not related,,in a normal world!!!!!
I will pull a plug and shoot a pic of it later tonight or tomorrow.
They are Bosch, BUT, they have a Chrysler part number. The pittle cap on the end is different that the plastic "hat" that were on the original. These have a concave metal pittle that's crimped on. The company I bought them from "assured" me the are a direct compatable swap.
Only thing I could imagine is they are the wrong pressure/flow rate...??
They were installed AFTER it failed in Dec 2003. Today was the first test with them installed.
Well, my throwout/release bearing is about to go out....not related,,in a normal world!!!!!
I will pull a plug and shoot a pic of it later tonight or tomorrow.
#15
Drifting
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Is there someone close to you that would be willing to swap injectors and let you retest? What part number is on the injectors? I am willing to bet they are flowing more fuel than the OE units.