CAT DELETE
Lead Driver
Joined: May 2009
Posts: 6,815
Likes: 707
From: Tobyhanma, PA
As stated before true duals will reduce your backpressure and hurt your low end, on top of that getting rid of the EGR will make you lose a few MPG. With all that, I figure I'd just as well go ahead and keep the EGR and go with pacesetter anda good Y-pipe.
Elder User
Joined: Dec 2008
Posts: 805
Likes: 1
From: Small town Iowa
Go on rpm outlet they have o2 simulators gettin a pair for my 96 and dads 96 due to pluged cats and 100 bucks for two sensors is better than the price of two new cats just find someone you can sell your other one to
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Duals or single got nothing to do with EGR, on the 5.8 it just comes down to whether the headers have an EGR port or not and even if they don't adding one isn't a big deal, and on the 5.0 it's totally irrelevent because the EGR doesn't connect to the exhaust.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
You can't replace the front O2 sensors with simulators, it's the only feedback the computer gets on the A/F ratio the engine is actually producing. This will also set codes and result in high fuel consumption.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
you probably need to get your pipe upgraded anyhow if its stock. take that time to go from 2 cats to 1 hi flow unit. we all breath better, performance is increased and the efi system is happy also.
Elder User
Joined: Dec 2008
Posts: 805
Likes: 1
From: Small town Iowa
I'm talkin about the third one between the two cats
Thread Starter
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Elder User
Joined: Nov 2007
Posts: 793
Likes: 1
From: Lincoln, Ne
so what your saying is keep the 1st O2 sensor and get simulators for the other 2. i will hafta check on a set of them
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Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
no, you must keep the first 2 sensors. they should be on either side of the current y pipe near the collector. you should then have 1 cat and the 3rd o2 sensor and another cat after that.
you can put a hi flow cat before the last o2 and then no cat after.
the computer reads from either bank right/left and makes adjustments then confirming those with the last o2. obd-II is complicated in some ways but very efficient for this reason.
you can put a hi flow cat before the last o2 and then no cat after.
the computer reads from either bank right/left and makes adjustments then confirming those with the last o2. obd-II is complicated in some ways but very efficient for this reason.
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