2001 Mustang V6 3.8 DTC P0430 Which cat? help! - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 7 (permalink) Old 03-07-2011 Thread Starter
Rookie
 
socalchris's Avatar
 
Joined: Mar 2011
Location: Pasadena
Posts: 3
 
2001 Mustang V6 3.8 DTC P0430 Which cat? help!

I found what more than likely damaged my converter, it was either the misfire and/or the IMRC not working. I have repaired these issues, my final repair is the cat converter, yet I'm not sure weather I should replace both front AND rear converters. As you all know It has 4 converters, two on each side. According to the DTC- P0430 Catalyst system efficenciency below threshold (bank 2) I know the issue is on the left, yet not sure if I should replace both?

socalchris is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 03-07-2011
BOSS Member
V6 Member
 
davidcseifert's Avatar
 
Joined: Dec 2009
Location: White Hall
Posts: 3,775
 
I think, not sure, that its the first one, I'm not exactly positive on that though, it would make the most sense to be damaged being right up front or maybe both could be gone idk

Funny thing is I had that same code and it was just an O2 sensor going dead after 110K miles lol


BV heads, P&P lower, windstar upper, comp 218/226, 4.2 bottom end, 3k stall, flow 40's, O/R x-pipe, Pacesetter lt's, Xcal2, 65mm tb, CAI, 8.8 w/ 3.73's, MM LCA's
coming soon: blower cam and intercooled M112
dealer for Ortiz Performance; tunes, cams, etc. PM me!
davidcseifert is offline  
post #3 of 7 (permalink) Old 03-08-2011
SHELBY GT 350 Member
 
wmburns's Avatar
 
Joined: Sep 2010
Location: Houston
Posts: 6,847
         
On applications with two cats on each side, the front cat is a "pre-light" unit. It's designed to run at a hotter temperature to burn off excess hydro-carbons that may be in the exhaust.

The 2nd cat is the one that does the heavy lifting (SMOG wise).

Here's the problem. If the pre-light cat is NOT working, then the unburnt hydro-carbons in the exhaust will make the 2nd cat run too hot. This will ruin it.

There's a saying that goes, "cats never die, they are murdered". That means a cat should last the lifetime of the car. Unless something external causes cat failure.

Examples include, too rich, too lean, excessive oil in the exhaust, coolant in the exhaust, or anything that make the cat run too hot.

SO.... The challenge is to rule out an external cause for the cat failure. Otherwise the risk is premature failure of the replacements.

2003 GT Convertible (sold & missed)
2000 GT coupe (Craigslist project. Fixed. Now my DD). Windsor to Romeo swap.
wmburns is offline  
 
post #4 of 7 (permalink) Old 03-09-2011 Thread Starter
Rookie
 
socalchris's Avatar
 
Joined: Mar 2011
Location: Pasadena
Posts: 3
 
Quote:
Originally Posted by wmburns View Post
On applications with two cats on each side, the front cat is a "pre-light" unit. It's designed to run at a hotter temperature to burn off excess hydro-carbons that may be in the exhaust.

The 2nd cat is the one that does the heavy lifting (SMOG wise).

Here's the problem. If the pre-light cat is NOT working, then the unburnt hydro-carbons in the exhaust will make the 2nd cat run too hot. This will ruin it.

There's a saying that goes, "cats never die, they are murdered". That means a cat should last the lifetime of the car. Unless something external causes cat failure.

Examples include, too rich, too lean, excessive oil in the exhaust, coolant in the exhaust, or anything that make the cat run too hot.

SO.... The challenge is to rule out an external cause for the cat failure. Otherwise the risk is premature failure of the replacements.
Hey thanks for the info, I did find the issues that more than likely caused the damage and they have been repaired, yet the main question is, Do I replace BOTH front and rear cats? or how can I pin point the bad one?
socalchris is offline  
post #5 of 7 (permalink) Old 03-09-2011
Rookie
 
slickbullet5150's Avatar
 
Joined: Mar 2011
Location: Elk grove
Posts: 17
 
got a y pipe with 4 cats, of my 01, selling it, no problems let me know
slickbullet5150 is offline  
post #6 of 7 (permalink) Old 03-10-2011 Thread Starter
Rookie
 
socalchris's Avatar
 
Joined: Mar 2011
Location: Pasadena
Posts: 3
 
hey, is the y pipe the orignal or aftermarket? price?
socalchris is offline  
post #7 of 7 (permalink) Old 03-10-2011
BOSS Member
V6 Member
 
davidcseifert's Avatar
 
Joined: Dec 2009
Location: White Hall
Posts: 3,775
 
Quote:
Originally Posted by socalchris View Post
hey, is the y pipe the orignal or aftermarket? price?
$20 says it's factory since it has 4 cats and it's off his 01 lmao

BV heads, P&P lower, windstar upper, comp 218/226, 4.2 bottom end, 3k stall, flow 40's, O/R x-pipe, Pacesetter lt's, Xcal2, 65mm tb, CAI, 8.8 w/ 3.73's, MM LCA's
coming soon: blower cam and intercooled M112
dealer for Ortiz Performance; tunes, cams, etc. PM me!
davidcseifert is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 


Search Engine Friendly URLs by vBSEO 3.6.1