Runnin straight pipe off first cat- O2 sensor question
Thread Starter
|
Tuned
Joined: Aug 2004
Posts: 311
Likes: 4
From: Omaha, NE
Runnin straight pipe off first cat- O2 sensor question
Was looking to run straight pipe off the first cat (keeping the factory y connection), and just noticed the O2 sensor where i had planned on chopping. I am assuming that is an O2 sensor right? If so, how would be the best way of attaching it to the new straight pipe? Don't want to throw my EFI into wack.
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
On that one I would just cut it either right before or right after the rear catalyst. That's the first area where you can find round pipe to weld to. It also makes bending the pipe much easier. By the time you bend a pipe to go from the Y over the crossmember it will look just as crumpled up as the stock one.
Thread Starter
|
Tuned
Joined: Aug 2004
Posts: 311
Likes: 4
From: Omaha, NE
Well it's been cut right above the tranny crossmember, so the next piece of good round pipe it right next to the first cat and would remove the second O2 sensor.
Thought about just getting the Walker downpipe and starting from scratch.
Thought about just getting the Walker downpipe and starting from scratch.
Thread Starter
|
Tuned
Joined: Aug 2004
Posts: 311
Likes: 4
From: Omaha, NE
Well i will study Chilton's, haven't really references that yet, but there are very much so two sensors on the exhaust. One before the first cat, and one after the second cat right before the tranny crossmember.
Maybe one isn't an O2 sensor. Not very exhaust savvy, what other sensors do they put on the exhasut system?
Maybe one isn't an O2 sensor. Not very exhaust savvy, what other sensors do they put on the exhasut system?
Trending Topics
Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread Starter
|
Tuned
Joined: Aug 2004
Posts: 311
Likes: 4
From: Omaha, NE
Hmm, Checked Chilton's and you're right (never thought you weren't) in that they don't mention anything else on there... So what the hell is it? guess this weekend i'll crawl under there and unscrew it to see what it is.
Senior User
Joined: Jul 2003
Posts: 311
Likes: 2
From: Nashville
Think the connector between the two converters is the one for the EGR system. The 87-88 models I've seen had just one O2 sensor and it connects in the little balance tube welded between the two downpipes. I have an '88 factory Y-pipe on my van, and had to cap both holes.
My Y also came from the scrapyard cut behind the front converter above the crossmember. To connect the pipe back to the muffler I wound up taking a 2.25" to 2.5" exhaust adapter and having a muffler shop expand the 2.5" end up to a roughly 3" cone to fit over the end of the stock pipe [which isn't perfectly round]. Tack welded the adapter in place and bent it's rim down to better match the profile of the stock pipe, then welded it closed.
My Y also came from the scrapyard cut behind the front converter above the crossmember. To connect the pipe back to the muffler I wound up taking a 2.25" to 2.5" exhaust adapter and having a muffler shop expand the 2.5" end up to a roughly 3" cone to fit over the end of the stock pipe [which isn't perfectly round]. Tack welded the adapter in place and bent it's rim down to better match the profile of the stock pipe, then welded it closed.
Last edited by 83Van; Oct 10, 2006 at 07:33 PM.
Thread
Thread Starter
Forum
Replies
Last Post
cowboymustang
1987 - 1996 F150 & Larger F-Series Trucks
5
Mar 30, 2006 10:45 AM
