Question about 1999 Ford Crown Victoria

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1999 Crown victoria.codes P0174-P0171 It's reactions are the following.i have to try 2 or 3 times the ignition before it start's press gas when it starts to heat up and keep running.the most crucial is when going up hill for quite a while it looses power till it dies even worst when ac is on

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P0174 System Too Lean Bank 2
P0171 System Too Lean Bank 1

Have you tried to work on the fuel system side? Have you tried
fuel injector cleaner from a bottle into the gas tank?

i.e., fuel filter, fuel pump, fuel pressure readings from the rail,
fuel injectors:
Fuel Injectors Testing The easiest way to test the operation of the fuel injectors is to listen for a clicking sound coming from the injectors while the engine is running. This is accomplished using a mechanic’s stethoscope, or a long screwdriver. Place the end of the stethoscope or the screwdriver (tip end, not handle) onto the body of the injector. Place the ear pieces of the stethoscope in your ears, or if using a screwdriver, place your ear on top of the handle. An audible clicking noise should be heard; this is the solenoid operating. If the injector makes this noise, the injector driver circuit and computer are operating as designed. Continue testing all the injectors this way.
CAUTION
Be extremely careful while working on an operating engine, make sure you have no dangling jewelry, extremely loose clothes, power tool cords or other items that might get caught in a moving part of the engine.
All Injectors Clicking If all the injectors are clicking, but you have determined that the fuel system is the cause of your driveability problem, continue diagnostics. Make sure that you have checked fuel pump pressure as outlined. An easy way to determine a weak or unproductive cylinder is a cylinder drop test. This is accomplished by removing one spark plug wire at a time, and seeing which cylinder causes the least difference in the idle. The one that causes the least change is the weak cylinder.
If the injectors were all clicking and the ignition system is functioning properly, remove the injector of the suspect cylinder and bench test it. This is accomplished by checking for a spray pattern from the injector itself. Install a fuel supply line to the injector (or rail if the injector is left attached to the rail) and momentarily apply 12 volts DC and a ground to the injector itself; a visible fuel spray should appear. If no spray is achieved, replace the injector and check the running condition of the engine.
One or More Injectors are not Clicking Unplug the fuel injector connector 1999 Crown victoria.codes P0174-P0171 It's - 91055p01.jpg
Probe the two terminals of a fuel injector to check its resistance 91055p04.jpg
Plug the correct "noid" light directly into the in1999 Crown victoria.codes P0174-P0171 It's - 91055p02.jpgss connector 91055p02.jpg
If the correct "noid" light flashes while the eng1999 Crown victoria.codes P0174-P0171 It's - 91055p03.jpgng, the injector driver circuit inside the PCM is working 91055p03.jpg
If one or more injectors are found to be not operating, testing the injector driver circuit and computer can be accomplished using a "noid" light. First, with the engine not running and the ignition key in the OFF position, remove the connector from the injector you plan to test, then plug the "noid" light tool into the injector connector. Start the engine and the "noid" light should flash, signaling that the injector driver circuit is working. If the "noid" light flashes, but the injector does not click when plugged in, test the injector’s resistance.
If the "noid" light does not flash, the injector driver circuit is faulty. Disconnect the negative battery cable. Unplug the "noid" light from the injector connector and also unplug the PCM. Check the harness between the appropriate pins on the harness side of the PCM connector and the injector connector. Resistance should be less than 5.0 ohms; if not, repair the circuit. If resistance is within specifications, the injector driver inside the PCM is faulty and replacement of the PCM will be necessary.

Posted on Jul 14, 2010

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Related Questions:

1 Answer

P0171 and p0174


Those are Oxygen Sensor Codes, you can google
& look up

They need to be replaced every 100,000 miles, but won't
cause a no start condition or be effected by outside temp

Spark Plugs -- have to be replaced every 3 years,can't just
drive until you have a problem

Sounds like lack of Preventative Maintenance to me

Too many items to check or test ,to go into here

Apr 08, 2014 | 1999 Ford Crown Victoria

1 Answer

I would like to know what these codes mean


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P0174 System Too Lean (Bank 2)
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What are the probable causes of DTCs P0171, P0174, and P0455?


Smoke testing for codes P0171 P0174 - YouTube

? 5:48
www.youtube.com/watch?v=kZsqEfP-5zM
Jan 18, 2011 - Uploaded by realfixesrealfast Smoke testing for codes P0171 P0174 .... I have a 1995 ford mustang gt 5.0 and it keeps having a Fault code 176 pop up. ....Ford Explorer P0174 code intake air leak check engine light by froggy - Duration: 16:11. by froggy ...

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How to fix codes P0171 & P0174


Determining exactly what of the thousands of parts on a modern car is broken is as difficult as doing the repairs many times. IN this video you'll learn how to diagnose and fix error codes P0171 and P0174 on a 2001 Ford Escape, which indicate vacuum problems.http://www.lightdeal.co.uk/

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Codes- P0171, P0174, P2106, P0351, P0355 and P061C the car is a 2006 ford five hundred. The car runs good at times. any suggestions?


P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
P2106 Throttle Actuator Control System - Forced Limited Power
P0355 Ignition Coil "F" Primary/Secondary Circuit
May be your car run normally now, but you must check and repair the fault in advance.
____________
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1 Answer

1999 Crown Victoria.Codes P0174-P0171 It's reactions are the following.I have to try 2 or 3 times the ignition before it start's, press gas when it starts to heat up and keep running.The most crucial is...


something is wrong with fuel delivery system ,this could be anything from a mass air flow sensor to a fuel delivery pressure problem even a blocked fuel filter ,best advice is to ask a local mechanic to have a look

Jun 15, 2010 | 1999 Ford Crown Victoria

1 Answer

1999 Crown Victoria: What is the schedule for replacing the timing belt...


this car does not have a timing belt! its a chain ! 2 timing chains ! normally at 100.00 0 miles you will hear them making noise

May 17, 2010 | 1999 Ford Crown Victoria

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