o2 sensor ?
Thread Starter
|
Senior User
Joined: Aug 2003
Posts: 389
Likes: 0
From: SOUTHEAST OHIO
o2 sensor ?
1987 2.9 with 206,000 mile. Original o2 sensor. It has been thru one completely blown motor and one blown intake gasket. Runs okay but I think it should be better. Should I replace or not? If it is partially bad what will I notice if I replace it? Better gas mileage, better idle, more power or what? I have read elsewhere that it should be changed every 75,000 to 100,000 miles. Thanks
Hotshot
Joined: May 2004
Posts: 12,170
Likes: 5
From: The hills of No. Calif.
Sounds like it's overdue. They're relatively cheap and not difficult to replace, so it couldn't hurt. Have you tried pulling the codes to see if anything turns up on the O2 sensor, just for the heck of it?
Postmaster
Joined: Jul 2004
Posts: 3,624
Likes: 1
From: Bixby, OK
I replaced my O2 sensor, cap, rotor, spark plug's and wires, and cleaned the TB last night. I need to fix my vacuum leaks and then I should be set. The difference is already night and day. Any body here have vacuum diagram for the 2.9?
Senior User
Joined: Aug 2004
Posts: 140
Likes: 0
From: Fort Wayne, IN
Originally Posted by RomerB2
I replaced my O2 sensor, cap, rotor, spark plug's and wires, and cleaned the TB last night. I need to fix my vacuum leaks and then I should be set. The difference is already night and day. Any body here have vacuum diagram for the 2.9?
I THINK this is how it is on my 88, I could be off on the fresh air hose. I've converted to MAF, and no longer need any vacuum lines on the passenger side of the intake.
The 3 lines on the passenger side of the upper intake plenum - MAP sensor, Air Box and the Fresh Air square hose.
The rest of the back/drivers side go to the transmission (not sure about standard), fuel pressure regulator and the brake booster.
You have 3 under the throttle body. 1 goes to the PVC valve on the passenger valve cover, the middle/small goes to the '**** can' (fumes from the fuel tank), and the last bigger one goes to the breather on the driver side valve cover.
Pete
