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Dan, ASE Certified Technician
Category: Ford
Satisfied Customers: 1694
Experience:  Auto Technician
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2004 ford freestar. Stalled getting on freeway. now won't

Customer Question

2004 ford freestar. Stalled getting on freeway. now won't start. turns over but no spark.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: yes it's good. only 1 month old.
JA: Are you fixing your Freestar yourself? What have you tried so far?
Customer: Yes. Fuel pump is fine. Tried replacing alternator and ignition coil. still no spark.
JA: Anything else you want the mechanic to know before I connect you?
Customer: worried it might be the pcm.
Submitted: 1 year ago.
Category: Ford
Expert:  Dan replied 1 year ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.

Expert:  Dan replied 1 year ago.

I would scan this for codes. A faulty crank sensor can also cause a no spark condition.

Customer: replied 1 year ago.
I hooked up a scanner and it pulled no codes. Checked the crank sensor with voltometer it seemed to be working fine.
Expert:  Dan replied 1 year ago.

Crank sensor is checked in Hz.

Customer: replied 1 year ago.
The guy working with me on it is an electrical engineer - he was using his machine not mine. We compared the output to that of a brand new one they let us check at the auto parts store. I'm not sure how he checked it.
Expert:  Dan replied 1 year ago.

Could be an ecm issue, check the triggering signal at the coil. Also check the power and ground at the coil. Do you need a wiring diagram of the engine harness?

Check all fuses and relays.

Customer: replied 1 year ago.
The freestar is notorious for water getting in the pcm. Coil was good. All fuses and relays were good.
Expert:  Dan replied 1 year ago.

Check the rpm signal on the scan tool while cranking.

Expert:  Dan replied 1 year ago.

Hello again Dan here,

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