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Posted on Oct 17, 2017
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I have a 93' Ford Taurus that failed emissions

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Bill Boyd

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  • Ford Master 53,816 Answers
  • Posted on Oct 17, 2017
Bill Boyd
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Joined: Jan 04, 2013
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Run the fault codes to find the faulty sensor
sensors that control the exhaust emissions are the HO2S ( heated oxygen sensors in the exhaust manifold/s
the O2 sensor ( oxygen sensors after the cat converters ) and the EGR unit that recycles exhaust gas back through the engine to re-burn the gasses

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emissionwiz

Marvin

  • 85242 Answers
  • Posted on Jun 03, 2009

SOURCE: failed emissions test

looks like you need a new catalytic converter and an injector pressure clean, also clean the throttle body and the airbypass valve..

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Anonymous

  • 1111 Answers
  • Posted on Aug 26, 2009

SOURCE: FAILED EMISSIONS

possible but could be head gasket or valves , or worn rings and is by passing the pistons going straight out the end ...or maby settings are wrong ? try carb cleaner and inspect visually air-filter etc.

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0helpful
1answer

95 taurus with re manufactured 3.0l engine from ford runs rich at idle fails emission test. no codes, new motor from ford has 750 miles since install. o2 sens have been replaced no change still no codes...
check fuel pressure/volume, injectors, engine temp sensor for computer to know what the engine temp is, map sensor, timing, throttle position sensor. what emission did it fail might help.
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Feb 12, 2015 • Ford Cars & Trucks
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Taurus diagram 02 sensors
Check it out on you tube !
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Jul 09, 2014 • 2002 Ford Taurus
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Failed emissions test
You might check out the links below good luck:


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May 13, 2014 • 1992 Ford Taurus
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Runs rich
Bad fuel pressure regulator.
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99 Taurus drive cycle without scan tool
Technical problem that needs manufacture.
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My 1989 Mercedes 260E has no EGR valve and CA emission test failed NOX. What's next?
It does have an EGR valve
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Apr 10, 2013 • Cars & Trucks
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My son's 1995 Ford Taurus failed the HC-hydrocarbon emissions. How do I fix this?
did the car have an oil change before the test? has the throttle vlave ever been cleaned of accumulated carbon build up, is the engine reaching normal operating temperature? if not these are common reasons for the HC failure.
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Sep 22, 2010 • 1995 Ford Taurus
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I need diagram for evap system for 2003 Ford
You DO NOT necessarily need special testing and tools to fix this. Many auto parts stores have scan tools that they'll hook up for free as a diagnostic aide. Your evap system is solely to keep fuel vapors from escaping into the atmosphere when your car is OFF, but you will fail emissions testing with a leak.
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Dec 04, 2009 • 2003 Ford Taurus
3helpful
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I have a 2002 Ford Taurus, and an engine sign showed up. However, I pulled out the code which is P0442. what is the problem, how much would that cost me and when do I need to fix it, can I wait for the...
P0442 code relating to the EVAP (Evaporative Emission System).a small emissions leak. also check the gas cap .Try cleaning the seals first and then try putting a little vaseline on the seals before getting a new gas cap. -------------
 Code P0442-Evaporative emission control system. Canister Purge system failed the monitor test indicating a large leak (over 0.040”). Enabling conditions: Engine running after a 6 to 8 hour engine off period called a cold soak. The test runs when engine load is between 15 to 45% and inlet air temperature between 40 and 130°F. Blocking Action: This code can block the following monitors: Fuel Control, O2 monitor, Catalyst Monitor, misfire monitor. Testing: Check the purge hoses for leaks, leaking vapor management valve or loose gas cap.

This simply indicates that there was no flow from the evap system when the purge valve was energized. This could be cause of a few different reasons. First, check for leaks by visually looking at all evap lines for cranks rips or any tears. Basically, anywhere that fuel vapors can escape.
----------- Here is the test that will smoke the system for leaks with a smoke machine.

Evaporative Emission System Leak Test

SPECIAL TOOL(S)

CAUTION: The evaporative emission system must not be pressurized to more than 3.48 kPa (14 inches H2O)or damage to the evaporative emission system may occur.
  1. Connect the Evaporative Emission System Leak Tester to the evaporative emission test port.
  2. Close the canister vent solenoid.
  3. Pressurize the evaporative emission system to 3.48 kPa (14 inches H2O) .
  4. Monitor the system for two minutes . The system fails the leak test if the pressure falls below 2.0 kPa (8 inches H2O) .
  5. Repair any leaks as necessary.
  6. Repeat the leak test until the system remains above 2.0 kPa (8 inches H2O) after the two-minute test period.
---------- get it repaired ASAP because if you drive the car in same condition the emisson system can get damaged.and code will be p0445 ,now the code is p0442 its for leak in the emisson system. ---------------- This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.
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Oct 15, 2009 • 2002 Ford Taurus
0helpful
1answer

Emmisions?
catalytic converter most likely
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Jul 30, 2008 • 1993 Ford Ranger SuperCab
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95 taurus with re manufactured 3.0l engine from ford runs rich at idle fails emission test. no codes, new motor from ford has 750 miles since install. o2 sens have been replaced no change still no codes...

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