On a clog cat, why would it make the engine run lean?

Tiny
MIKELEE7772
  • MEMBER
  • 2001 FORD ESCAPE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 50,000 MILES
ON a clog cat why would it make the engine on that bank run lean? For all three have miss fire cly, and make that bank run lean?
Wednesday, December 22nd, 2010 AT 7:10 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
If anything it will run rich, may be the upstream O2 sensor is causing the ECU to lean it out due to a faulty signal, replace the bad cat and see what you get in the way of codes.

Mark (mhpautos)
Was this
answer
helpful?
Yes
No
Tuesday, December 28th, 2010 AT 2:47 AM

Please login or register to post a reply.

Sponsored links