2000 Dodge Dakota Rough Running and Code P0171

JIMBUCKINGHAM

MEMBER
2000 DODGE DAKOTA
V8
2WD
AUTOMATIC
185,000 MILES

Juat all of a sudden it started idleing real rough and running poor. It has set Code P0171. This code can be a lot of things I understand. I did not find any vacumn leaks, the power sterritng has not leaked down on the O2 sensor connection. Not sure where else to go. I think there is a rattlign sound that I guess could be the converter.

Thanks,

jim

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Lean condition P0171

A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

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Thursday, April 23rd, 2009 AT 7:44 AM

JIMBUCKINGHAM

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2 POSTS

I will put a vacumn gage on it and see. What is the best place to hock that in?

I will pull the MAF and see also.

The O2 or converter does not cause this?

I will have to find the procedure to check the EGR valve.

Thanks,

Jim

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Thursday, April 23rd, 2009 AT 7:53 AM

RASMATAZ

MECHANIC
75,992 POSTS

I will put a vacumn gage on it and see. What is the best place to hock that in?

Somewhere in the middle of the intake/pass the throttle plate-make sure its full vacuum not ported vacuum.

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Thursday, April 23rd, 2009 AT 8:33 AM