Question about 1997 Ford Taurus

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My engine light is on all the time after i warm it up when i start driving its misfireing bad once i let up on it the light stops blinking and it stops missfireing until i push on the gas

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  • Ford Master
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Sounds normal when you have a cylinder miss.
The flashing light means the problem is serious.
You would have the computer scanned for trouble codes then research the codes. You should get a code telling you which cylinder is not providing power and you check the ignition and fuel injector for that cylinder or cylinders.

Posted on Jan 08, 2013

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Posted on Jan 02, 2017

  • 115 Answers

SOURCE: Mondeo 55 plate starting problems when the engine is warm

Hi Warren,,
These cars are fitted with a Delphi common rail system that is known for various faults including yours, you need to have a sealed rail test done on the injectors as they are probably leaking off to much causing low pressure in the common rail,when the car is warm,they also suffer with injector code loss ,no reason they get confused this normally gives poor performance and high fuel consumption ,if the injectors are fine check the system for air leaks in the fuel supply pipes and check the leak off pipes for leaks,even the smallest leak can let air in,if the engine light has come on get the codes read ,
Darren DCS

Posted on Aug 12, 2009

REDOIL
  • 355 Answers

SOURCE: 2003 Ford Escape Won't Idle

well it could be idle control valve but i would check for vacuum leaks first see if any hose fell off but could be egr valve stuck open hope this leads you some where

Posted on Sep 18, 2009

Testimonial: "Very thourough and helpful. Thanks!!!"

jturcotte
  • 7699 Answers

SOURCE: i have a 2004 ford freestar 3.9 The engine light

Hi, the first step I recommend is to check for spark. You can do this by starting the car and then carefully pulling up the boot to the #1 ignition wire at the coil. If sparks are jumping inside the boot, you have spark and the ignition system is working.
jturcotte_504.jpg
1. Ignition: If there is no spark, shut of the engine and use an ohmmeter to check the impedance of the coil. Take the boot off, and connect your ohmmeter from the coil terminal to the engine ground. The resistance should be around 10-20 kohms. If not, replace the coil. If yes, the problem is the ignition module under the coil.

Now, assuming you have spark (which I believe you do, because the coil runs 2 cylinders, and you only have one cylinder that is misfiring), the problem will be a lack of compression or a bad injector (or possibly the injector wiring).

Note: I will provide repair steps once the troubleshooting is complete and the problem identified.
Also, if you do not have a multimeter, you can get one for $10-20 at radio shack or even Walmart. It will save you money overall--or maybe you have a friend that you could borrow a meter from.

2. Injector: The next easiest test to run is to see if the injector solenoid is clicking. You can do this by holding a long screwdriver to the injector and hold the other end of the screwdriver to your ear. With the engine running, you should hear the injector clicking. If not, you have a bad injector or a wiring problem. To determine whether the problem is the injector or the wiring, pull the connector off the injector and measure the AC voltage in the connector with the engine running. The voltage should be 1-2 volts or similar to that voltage of any other injector connector.
If the voltage is good, but the injector is not clicking, replace the injector.

3. Valves/compression: the last possible reason for a misfire is a lack of compression. The intake valve must open to accept a fuel/air charge, and both valves must be closed for the cylinder to fire. Sometimes an exhaust valve will burn and not hold compression. A blown head gasket can also cause this problem. The test we use to check the valves is a compression test. You can borrow or purchase a compression tester if you get to this point. Remove a few of the spark plugs including the cylinder that is misfiring. Screw the compression tester into the spark plug hole and crank the engine for a few revolutions. Record the pressure on the gauge, release the pressure, and go on to the next cylinder. If the pressure is much lower on any cylinder as compared to the highest cylinder, the cylinder head will have to be removed to correct the issue.

Please let me know the results of your troubleshooting and feel free to ask questions as you go.

Posted on May 20, 2011

  • 37 Answers

SOURCE: Engine Runs Rough at Idle

go to auto zone,its free ck.throtle senser

Posted on Feb 19, 2012

emissionwiz
  • 74945 Answers

SOURCE: 2001 ford taurus 3.0 v6 code p0306 misfire

Please go to this page for engine misfire causes.

Posted on Aug 08, 2012

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