4-Wire CEL/MIL Eliminators - 04/19/06 08:05 PM
Can someone tell me what these thing do? Do they like tell the computer that the cat's are there when they are not or what do they do? Thanks!
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Originally posted by projectSHO89:
Tony,
Chicken... Egg... Chicken ... Egg ...
Which came first?
You're assuming that, in your case, that the cat codes caused the poor fuel economy.
More likely, the conditions that caused the poor fuel economy, ie, misfire, lazy upstream O2 sensor, or whatever caused an excessively rich exhaust, caused the cat to fail due to all the unburned fuel that was dumped into it. This then set the efficiency codes..
Makes more sense...doesn't it?..
Originally posted by projectSHO89:
...Plugged cats usually cause other problems, not efficiency codes.
...
Originally posted by hotrod90019:
That's the code my car sent (P0420) will the mil eliminators fix my problem? If so how many do I need to buy.
Originally posted by Tony2005:
Originally posted by projectSHO89:
...Plugged cats usually cause other problems, not efficiency codes.
...
Correct.
Here is something from the TSB (in our own backyard for documentation).
"P0420 - Catalyst System Efficiency Below Threshold (Bank 1) Indicates Bank 1 catalyst system efficiency is below the acceptable threshold.
�· Malfunctioning ECT/CHT
�· High fuel pressure
�· Damaged exhaust manifold
�· Cylinder misfiring
�· HO2S wiring concerns (shorted or chafed, bent pins, etc.)
�· Damaged exhaust system pipe
�· Damaged muffler/tailpipe assembly
�· Retarded spark timing
Damaged Catalytic Converter:
�· Use of leaded fuel
�· Oil contamination/consumption
�· Silicone contamination (sealants/cleaners)"
It appears, if the P0420/P0430 is caused by the top eight items, yes, the engine is already running rich or lean and the engine is sent to the limp mode (I am correct here). If it is caused by the bottom three items, it should not run in the limp mode until it causes other issues. So the P0420/P0430 codes does not necessarily cause the engine to run in a limp mode immediately all the time (you are correct here).![]()
Originally posted by Big Jim:
Don't forget that many times (I even think most times) that cat effeciency codes on a Duratec Contour is a flase positive. There may not really be anything wrong. I have p[osted on that in the past.
Originally posted by CSVT#49:
Originally posted by Big Jim:
Don't forget that many times (I even think most times) that cat effeciency codes on a Duratec Contour is a flase positive. There may not really be anything wrong. I have p[osted on that in the past.
I can atest to this. I had the CEL come on a few weeks ago showing a O2 bank lean. I used the scan tool and erased the code and it hasn't showed up again yet so I don't know about those sensors sometimes.
Originally posted by ChiliSVT:
Well, I'm currently going throught the P0430 code and i can DEFINITELY say that my gas mileage is affected. I took a trip just before the CEL came on. I managed about 390miles on one tank. Since it's been on, I've taken the same trip and only managed about 300miles/tank =(
I'm going to install my MIL Elminators as soon as I can. (already got them. just don't have a jack yet)
I'll keep you informed on my results!
chili
Originally posted by ChiliSVT:
..
I'm going to install my MIL Elminators as soon as I can. (already got them. just don't have a jack yet)
..
Originally posted by Tony2005:
Tape connection well with duct tape (water in connectors will give you P0136 or P0156 CEL codes).
Originally posted by CSVT#49:
Originally posted by Tony2005:
Tape connection well with duct tape (water in connectors will give you P0136 or P0156 CEL codes).
Do not use Duct tape. If anything use electrical tape, but if you want to do it right use shrink wrap (can be picked up at radio shack for dirt cheap).
Originally posted by ChiliSVT:
why don't u use the MIL eliminators on the FRONT 2 o2 sensors?