Check engine light on, oxygen sensor washing out cylinders?

Tiny
BOB FELTON
  • MEMBER
  • 1996 FORD BRONCO
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 159,000 MILES
Check eng light oxygen sensor washing out cylinders 3, 4, 7, 8.
Do you
have the same problem?
Yes
No
Wednesday, November 16th, 2022 AT 1:57 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Bob,

What code or codes are you getting? By washing out, do you mean its flooding? Please explain.

Let me know the codes and exactly what is happening so I can better help you. Also, if you have a live data scan tool, let me know what the short-term fuel trims are and what the coolant temperature sensor indicates when cold.

Take care,

Joe
Was this
answer
helpful?
Yes
No
Wednesday, November 16th, 2022 AT 8:54 PM
Tiny
BOB FELTON
  • MEMBER
Lean on one rich on the other.
Was this
answer
helpful?
Yes
No
Thursday, November 17th, 2022 AT 3:55 PM
Tiny
BOB FELTON
  • MEMBER
Lean and rich codes o2 sensor, replaced several parts.
Started knock in engine, replaced engine, checked, blocked fuel filter, blocked cat. Checked codes had a bunch replaced comp helped some, checked codes rich and lean, replaced, distributor, plugs wires, MAP, mas EGR, coolant temperature bypass valve, and fuel pump. It runs good cold warms up light comes on runs rough.
Was this
answer
helpful?
Yes
No
Thursday, November 17th, 2022 AT 4:08 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Do you have an exhaust leak on one side of the engine (exhaust manifold) before the catalytic converter? That can cause a lean mixture on one side. See pic below for sensor locations.

Joe

See pic.
Was this
answer
helpful?
Yes
No
Thursday, November 17th, 2022 AT 4:35 PM

Please login or register to post a reply.

Sponsored links