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2006 Ford Escape crank no start

  • jon.lane
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01 Jul 2019 17:29 #31295 by jon.lane
2006 Ford Escape crank no start was created by jon.lane
Hello. I have a 2006 3.0 Ford Escape that has a no start condition due to loss of spark to all coils. No stored or active pcm codes. I do have 12v on all front coils just no ground signal from ecm while cranking. Check engine light turns off while cranking so I’m guessing that means crank sensor is good. I’m at loss what I need to check for to get it running again. I’m limited on amount of tools I have. Just test light, multimeter, and obd 2 basic scanner. Thanks.

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01 Jul 2019 18:01 #31298 by Cheryl
Replied by Cheryl on topic 2006 Ford Escape crank no start
Does your scanner read an rpm signal while cranking? I’m assuming probably but never hurts to check

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01 Jul 2019 18:05 #31299 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start
Yes around 200 rpms

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01 Jul 2019 18:11 #31300 by Cheryl
Replied by Cheryl on topic 2006 Ford Escape crank no start
Check powers/grounds at pcm if all good I’d call it

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01 Jul 2019 18:45 #31301 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start
Are the Injectors pulsing?

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01 Jul 2019 19:00 #31302 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start
Don’t know yet just pulled upper intake to get to them and back coils

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01 Jul 2019 21:19 #31307 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start
Without a scope I would eyeball the crank sensor, trigger wheel, make sure the missing tooth is there. If during cranking the check engine light goes out that means the PCM is getting an RPM signal, but it doesn't mean the sync notch is there.

imgur.com/a/Ch6OMdT

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01 Jul 2019 22:20 #31313 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start
Can anyone tell me why there would be no check engine codes stored, this happened while I was driving the vehicle, thought it was fuel pump at first (no check engine light, no rough idle etc ever occurred). Coils appear to be separately fired by ecm I pulled it yesterday no strange smells was going to send it off to have it rebuilt but put it back in to do further testing as I talked to a tech that rebuilds them and he said that it would probably be a waste to send to them due to what it was doing. From my understanding it normally takes one bad coil to fry the rest and i have pulled them all and visually appear good, will test further in morning.

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02 Jul 2019 03:58 - 02 Jul 2019 04:03 #31318 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start

jon.lane wrote: Can anyone tell me why there would be no check engine codes stored

Any signs of keep alive power disruption? Maybe codes are getting cleared. Have stuff like the emissions monitors run yet? Clock get reset?
Last edit: 02 Jul 2019 04:03 by jreardon.

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02 Jul 2019 09:50 #31324 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start
That explains that part. Had to put in new battery. Update just checked pins 1 and pin 13 at ecm. With no key in ignition they are showing they have grounds on both pins (test light lights) so I'm guessing that only means the computer is fried? Is my thinking correct?

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02 Jul 2019 12:36 #31327 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start
I think a more proper test would be to install an ammeter in series with the load side of relay that powers the coils or injectors. Turn the key on, and if there's current flow to the coils when they have no business turning on you found your problem.

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02 Jul 2019 12:43 #31328 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start

I do have 12v on all front coils just no ground signal from ecm while cranking

Plugged in, if you had 12 and 12, that would suggest no ground at the PCM.

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02 Jul 2019 13:32 #31329 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start

jreardon wrote:

I Plugged in, if you had 12 and 12, that would suggest no ground at the PCM.

not following this reply. I have 12 v at front 3 coils koeo with test light grounded...it lights on red wire....no ground on other side while cranking

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02 Jul 2019 13:50 #31330 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start

jon.lane wrote:

jreardon wrote:

I Plugged in, if you had 12 and 12, that would suggest no ground at the PCM.

not following this reply. I have 12 v at front 3 coils koeo with test light grounded...it lights on red wire....no ground on other side while cranking

I was following up on your finding that the PCM was grounding your test light, at pin 1 and 13. I was saying that can't be if you have power on the red wire going into the coil, and power coming out, hence 12 and 12. I understand you're saying you have no control to the coils, correct?

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02 Jul 2019 14:19 - 02 Jul 2019 14:25 #31331 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start
Are there any other odd symptoms to this car? What was the last maintenance item? Did you check for any blown fuses? Why did you change the battery? Is it possible the check engine light going out while you were cranking something else entirely, like loss of power to the computer? Check the crank signal at the computer and if that's there I'm with Cheryl, time to check computer power and grounds. Seems like maybe Cheryl was 10 steps ahead of me :)

edit: Never mind on the crank signal, you already said you had scanner reporting 200 rpms. And you would have lost communication to the scanner if the computer lost power.

I see 6 grounds and 3 power feeds to do voltage drop on. See any I missed?

Last edit: 02 Jul 2019 14:25 by jreardon.
The following user(s) said Thank You: jon.lane

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02 Jul 2019 14:30 #31332 by jon.lane
Replied by jon.lane on topic 2006 Ford Escape crank no start
Correct no ground control at coils as that’s what I think Ecu is supposed to supply to provide spark while cranking on those pins. There’s obviously 4 more but figured since already is ground on those wires with key out of ignition that there is something wrong in ecu or am I thinking wrong?

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02 Jul 2019 14:39 #31333 by jreardon
Replied by jreardon on topic 2006 Ford Escape crank no start
Coil driver a and injector 3? With circuits unpowered you may be getting a backfeed. That ignition transformer capacitor is a path to ground too is it not? If you unplug that, does the ground go away?

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