Thread: High Flow Cats help
View Single Post
  #3  
Old Wed, June 16th, 2010, 12:06 PM
cleatus12r's Avatar
cleatus12r cleatus12r is offline
F Your Yankee Blue Jeans
  
Join Date: Jan 2009
Location: Somewhere in Montana
Posts: 2,665
cleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to allcleatus12r is a name known to all
Default
Are you still in NM? Have you gotten your truck registered yet?

The problem with gutting the front two catalytic converters is that you WILL NOT pass emissions because you will get P0420 and P0430 codes due to catalyst efficiency (of which you will have none).

I just talked to Bill about this and his advice was to take your new rear cats, install them in the front locations since the front cats are the ones affected by A/F corrections. You WILL need new tunes to alter the diagnostic strategy for the high-flow cats and also to turn off the rear O2 sensor diagnostic.
__________________
Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.