|
|
Joined: Jun 2005
Posts: 5,345
Addicted CEG\'er
|
Addicted CEG\'er
Joined: Jun 2005
Posts: 5,345 |
Originally posted by yellowalfa:
...now I've put on mileliminators, thinking that it would fix the problem, but when I started the car, the check engine light is still on. I haven't had the code read to see if it is still P0420, but before that code there was no check engine light and it's never had a problem before, so... I was just wondering if the P0420 code could still be coming up because one of the oxygen sensors was bad?...
If you disconnected the battery while installing the mileliminators, all previous codes should have been erased. Incidentally, what type of mileliminators did you install? And did you install them correctly? Scan for the CEL code(s) and then you (and we) will have a better idea what the problem is. Right now, it is only a guess, broken connection, installed incorrectly, other codes not related to precats......
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
|
|
|
|
|
Joined: Jun 2005
Posts: 5,345
Addicted CEG\'er
|
|
Addicted CEG\'er
Joined: Jun 2005
Posts: 5,345 |
Originally posted by Big Jim:
...I have no idea what was in the mind of the engineers when they put the downstream oxygen sensors (cat monitor sensors) in front of the main cat. It is a mystery to me.....
I can speculate.
If the downstream O2 sensor is behind (after) the main cat, then if you get a P0420 code, you can't determine if it is a bad Bank 1 precat, Bank 2 precat or Main cat issue. You have to change all three to fix the problem.
The way it is designed now, you can determine if it is Bank 1 or Bank 2 precat going bad. Being able to determine 2 out of 3 isn't too bad.
Of course, the problem would be solved if they had 2 precats and 2 "main" cats.
Then, with an upper O2 sensor being above the Bank 1 precat and a lower O2 sensor being below the Bank 1 main cat, if the code shows up, this bank needs a new precat and main cat. ditto for Bank 2.
I'm sure an additional main cat, piping and flex pipe would cost a little too much for it to be acceptable to the accountants at Ford.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
|
|
|
|
|
Joined: Dec 2003
Posts: 1,899
Hard-core CEG\'er
|
|
Hard-core CEG\'er
Joined: Dec 2003
Posts: 1,899 |
so driving around with that code isnt a problem if you dont have emissions.. or can it cause damage to the engine?
|
|
|
|
|
Joined: Jun 2005
Posts: 5,345
Addicted CEG\'er
|
|
Addicted CEG\'er
Joined: Jun 2005
Posts: 5,345 |
Originally posted by Tour4reak:
so driving around with that code isnt a problem if you dont have emissions.. or can it cause damage to the engine?
Depends on what the reason(s) is/are for the code.
�· 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)
If it is from the first 8, then it could cause damage to the engine. If it is because of a damaged precatalytic converter, then, no, it shouldn't cause problems to the engine (unless the precats get plugged).
Of course, if you have a Check Engine Light on, you don't know if it is only for the P0420/P0430 or if there are other codes too unless you scan it on a regular basis (maybe everyday and having that yellow Check Engine Light on is distracting and annoying).
Last edited by Tony2005; 06/07/06 03:05 AM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
|
|
|
|
|
Joined: Dec 2003
Posts: 1,899
Hard-core CEG\'er
|
|
Hard-core CEG\'er
Joined: Dec 2003
Posts: 1,899 |
i checked the code on monday it was for p420.. exhaust is fine.. motorcraft plugs Ford racing wires.. (less than 2 months old). car might burn a little oil (muffler tips are black) no blue smoke comes outta my exhaust when i'm driving. or it could be carbon buring up..
|
|
|
|
|
Joined: Jun 2005
Posts: 5,345
Addicted CEG\'er
|
|
Addicted CEG\'er
Joined: Jun 2005
Posts: 5,345 |
If you are out of the 8 year/80k mile warranty, then I would suggest clearing the code and see if it comes back. If it comes back, I would suggest trying Berrymans B12 fix. If that doesn't work, then mileliminators.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
|
|
|
|
|
Joined: Dec 2003
Posts: 1,899
Hard-core CEG\'er
|
|
Hard-core CEG\'er
Joined: Dec 2003
Posts: 1,899 |
Originally posted by Tony2005:
If you are out of the 8 year/80k mile warranty, then I would suggest clearing the code and see if it comes back. If it comes back, I would suggest trying Berrymans B12 fix. If that doesn't work, then mileliminators.
yea I'm outta the warranty (131k) it keeps coming on.. I'm just wondering if its gonna damage my engine..
|
|
|
|
|
Joined: Jan 2003
Posts: 54
CEG\'er
|
|
CEG\'er
Joined: Jan 2003
Posts: 54 |
I managed to buy a used exhaust manifold with the pre-cat installed in it off of another CEG'er. Does anyone have a pic of what it should look like for the firewall side of the engine??? I don't want my cousin to help me take it apart only to realize we have the wrong part. LOL
|
|
|
|
|
Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
|
|
Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
the rear manifold is the same for all years, it is the one that doesn't look like a L and only has a bung for an O2 sensor as the cat monitor sensor is located on the y-pipe
I can provide a photo of a msds header for the one in question later tonight ...
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
|
|
|
|
|
Joined: Dec 2001
Posts: 6,910
Hard-core CEG'er
|
|
Hard-core CEG'er
Joined: Dec 2001
Posts: 6,910 |
the rear exhaust manifold next to the firewall should look something like this: 
- 95 Mystique LS - Zetec/5spd
- 99 Contour SeVT Sport - Duratec/5spd
Official NE-CEG Contour/Mustang Family
|
|
|
|
|
