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Posted on Jun 04, 2009
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Check engine light won't go away!!!

I have a 2002 mercury cougar 4 cylinder and the check engine light is on and won't go off. i have replaced the o2 sensors and the mass air flow meter. the same code pops up everytime i try to go through emmisions. the code is p0171 system is too lean (bank 1) what could it be and how do i fix it.

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  • Posted on Jun 05, 2009
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Joined: Jun 04, 2009
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Might be number one fuel injector not letting enough gas enter the # 1 cylinder.

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I have a 2002 mercury cougar, the engine starts, but the RPMs do not remain consistent. The engine hesitates and will not go above 30 mph.and starting and running, if I let the RPMs go down, the engine...
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Jan 19, 2011 • 2002 Mercury Cougar
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I have a 2002 6 cyl Mercury Cougar. I need to replace the o2 sensor... How would I do that?
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Aug 10, 2010 • 2002 Mercury Cougar
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Have 2002 mercury couger and need to figure out which coil pack is number 3
Facing the engine ,in front of the engine,where the pulleys are,number three cylinder is the third one back,on your left.It goes on the left 1 2 3,,,and on your right 4 5 6,if it is a 8 cylinder it is on your left 1 2 3 4 and on your right 5 6 7 8..If this was helpful,please rate,and thank you.
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Jun 29, 2010 • 2002 Mercury Cougar
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Cougar 2.5 liter cylinder numbering?
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Nov 03, 2009 • 2002 Mercury Cougar
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I have a 2002 mercury cougar and my check engine light comes on after a hard rain and usually goes off after a day or two. Sometimes it flashes which according to the manual means that it is...
thats when you need to get it scanned sounds like water is getting in a sencer o2 perhapes but scan it for the code it should be stored in the memory
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Sep 01, 2009 • 2002 Mercury Cougar
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I mixed up the fireing spark plug cables on my 6 cylinder 2002 mercury cougar. I need the right order please.
On the 2002 Mercury Cougar
For the 2.5L V6 DOHC:

Firing Order:
1-2-3-4-5-6

Cylinders:
.....(back)
1......2......3
4......5......6
.....(front)

Ignition Coil:
.(back)
4...6...5
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Jun 13, 2009 • 2002 Mercury Cougar
0helpful
1answer

Question about buying a car
http://consumerguideauto.howstuffworks.com/1999-to-2002-mercury-cougar.htm

http://www.edmunds.com/mercury/cougar/review.html

http://www.carsurvey.org/reviews/mercury/cougar/2002/

Some websites to read up on it

Robert
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Jan 12, 2009 • 2002 Mercury Cougar
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I have a 2002 mercury cougar, the engine starts, but the RPMs do not remain consistent. The engine hesitates and will not go above 30 mph.and starting and running, if I let the RPMs go down, the engine...

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