p0147 and rough idle when cold

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Dec 17, 2004 | 12:44 PM

tcoughlin

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p0147 and rough idle when cold

For the last few cold mornings when i start my explorer it will idle fine, then i will hear a click and it sounds like it wants to stall. After a moment, i think i hear the click again and the idle surges a little. Eventually after the engine warms, the explorer will idle fine. This morning while driving to work my CEL light came on. I had the code read and it is P0174. Do these symptoms point to bad oxygen sensors?

Thank you in advance for you help
Thomas

Dec 17, 2004 | 12:57 PM

Wal-N2brk

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clean your mass airflow sensor. It's a likely culprit.

Wal

Dec 17, 2004 | 03:34 PM

87 XLT

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From: SoCal

I cant find a PO147, are you sure thats the code that was pulled?
What are you driving & which engine?

Last edited by 87 XLT; Dec 17, 2004 at 03:38 PM.

Dec 17, 2004 | 04:45 PM

tcoughlin

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correction, the code was p0174, system to lean

thank you for the information already posted, i am going totry to clean the air sensor tonight

Dec 17, 2004 | 04:59 PM

87 XLT

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From: SoCal

It's probably sucking air from a vacuum leak somewhere. The SOHC's-if thats what you have- are known for leaky intake manifold O-rings.

Dec 17, 2004 | 08:08 PM

tcoughlin

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i have a 97 explorer with the the sohc and 117k miles. I do remember that around 39k, I had a similar problem except the CEL light never came on. I had the oxygen sensors and gaskets replaced under warranty. Tonight, I cleaned the mass airflowsensor and reset the computer by disconnecting the batter for 5 mins. Will see what happens in the morning. I really appreciate the responses I have received