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Low idle and slow acceleration

Tiny
BEAVERSONLY
  • MEMBER
  • 2005 FORD EXPLORER
  • 175,000 MILES
I took my SUV to AutoZone April, 27 codes set all the cylinders are misfiring. I think it said the engine cranking or positioning sensor.

Low idle, when I press on the gas to take off it sounds like it is running good just slow acceleration. I am wondering if you could be the catalytic converter because when I looked at it looks all reddish tint like it was getting hot. I had a 1995 Explorer that basically ran the same codes and I changed everything on it it ended up being the brain or computer. Is there any way to test that? Thank you for all your patience and advise.
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Monday, January 22nd, 2018 AT 1:39 AM

6 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
The catalytic converter should not run that hot. I would be checking for leaking injectors as well, and have the catalytic converter checked as it may be collapsed blocking exhaust flow.
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Monday, January 22nd, 2018 AT 1:53 AM
Tiny
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So leaking fuel injectors will make it run that hot?
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Monday, January 22nd, 2018 AT 10:04 AM
Tiny
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  • 4 POSTS
  • 2005 FORD EXPLORER
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
On my question before I cleaned the throttle body the throttle body sensor, I noticed that the spark plugs have a lot of a lot of carbon on them. I noticed when I start it now it smells like gas. It is making me think the catalytic converter. Can I get your input on it please? Thank you.
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Monday, January 22nd, 2018 AT 11:52 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,722 POSTS
Yes, it does sound like the catalytic converter is plugged. Here is a test you and to confirm to issue:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please let us know what you find.

Cheers, Ken

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Monday, January 22nd, 2018 AT 12:01 PM
Tiny
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Thank you and I appreciate the YouTube link you sent me. First thing tomorrow I will try and get back with you.
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Monday, January 22nd, 2018 AT 6:54 PM
Tiny
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  • MECHANIC
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Unburnt fuel from an over rich mixture will re burn in the catalytic converter causing it to overheat and this can make it fail.
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Monday, January 22nd, 2018 AT 10:34 PM

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