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Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Car
Satisfied Customers: 35134
Experience:  16 years of experience
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2002 ford Taurus 3.0 24 valve no spark changed coil PAC crank

Customer Question

2002 ford Taurus 3.0 24 valve no spark changed coil PAC crank an cam sensor still no spark
Submitted: 1 year ago.
Category: Car
Expert:  Chris (aka-Moose) replied 1 year ago.

Hello, I'm Chris. Thanks for visiting Just Answer.

 

While the key is in the run position is the (CEL) check engine light on or off?

While cranking is the CEL on or off?

 

Customer: replied 1 year ago.
Light is on
Expert:  Chris (aka-Moose) replied 1 year ago.

The CEL is on during both tests?

 

Customer: replied 1 year ago.
Cranking light is off
Expert:  Chris (aka-Moose) replied 1 year ago.

Great, this means the PCM is getting a crank signal. Unplug the ignition coil, turn the key to run, is the Red wire at the coil showing battery voltage?

 

Customer: replied 1 year ago.
Yes it is
Expert:  Chris (aka-Moose) replied 1 year ago.

How exactly are you testing, to verify there is no ignition spark?

Do you own a test light?

 

Customer: replied 1 year ago.
Have a spark teste
Expert:  Chris (aka-Moose) replied 1 year ago.
Do you own a test light?
Customer: replied 1 year ago.
Yes I have a test light
Expert:  Chris (aka-Moose) replied 1 year ago.

Great, unplug the coil, connect your test light to the battery positive wire. Have someone crank the engine while you probe the other 3 pins at the coil connector, not the Red wire. While cranking does the test light flash when testing these 3 wires for a pulsing ground?

 

Customer: replied 1 year ago.
No they dont
Expert:  Chris (aka-Moose) replied 1 year ago.

Thanks, XXXXX XXXXX verified the crank sensor signal is getting to the computer, and we have verified the coil is getting power. This last test verifies the PCM is not triggering the internal coil ground switches. At the PCM we need to verify its getting all needed powers and grounds, if there good then the PCM is bad. See the below diagrams.

https://dl.dropboxusercontent.com/u/90220402/02pcm1.jpg

https://dl.dropboxusercontent.com/u/90220402/02pcm2.jpg

 

Chris (aka-Moose), Technician
Category: Car
Satisfied Customers: 35134
Experience: 16 years of experience
Chris (aka-Moose) and 7 other Car Specialists are ready to help you
Customer: replied 1 year ago.
Where do I look now
Expert:  Chris (aka-Moose) replied 1 year ago.

Are you asking where is the PCM?

 

Customer: replied 1 year ago.
No I know where it is I don't know how this happen over nite
Expert:  Chris (aka-Moose) replied 1 year ago.

If it is the PCM itself, then its just like any other computer, one minute working then not the next. Electrical or electronic failures give no warning usually.

 

Customer: replied 1 year ago.
Could this possibly be anti-theft?
Expert:  Chris (aka-Moose) replied 1 year ago.

The anti theft shuts down the fuel injectors and on some the fuel pump as well. None disable the spark. If there is also a theft issue. The theft light will flash 3 times a second while trying to start.

 

Customer: replied 1 year ago.
PCM cks out must be bad
Expert:  Chris (aka-Moose) replied 1 year ago.

When you replace the PCM ,you will need to get the replacement programmed to the vehicle before the vehicle will start.

 

Expert:  Chris (aka-Moose) replied 1 year ago.
Hello again Chris here.

It has been a few days, so I am just checking in with you to see if you still need help with the concern we worked on, and if not to say Thanks.

Also note we have about 80 categories from medical to boats to small engines to legal to whatever you can think of. If you have any other questions give us a shot with another question.

Thanks Chris
.
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Chris (aka-Moose)
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